Best ClearOS Alternatives in 2026
Find the top alternatives to ClearOS currently available. Compare ratings, reviews, pricing, and features of ClearOS alternatives in 2026. Slashdot lists the best ClearOS alternatives on the market that offer competing products that are similar to ClearOS. Sort through ClearOS alternatives below to make the best choice for your needs
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NethServer
NethServer
€48 per yearThe system analyzes all web traffic and can block specific websites through both HTTP and HTTPS using the Squid proxy. It is integrated with ClamAV antivirus and employs site blacklists for enhanced security. The setup features a multi-domain web server powered by a ready LAMP stack, allowing for the hosting of multiple domain names on a single server. Built on NextCloud, it offers universal access to your files via the web, personal computers, or mobile devices, ensuring you can access your information from anywhere. Additionally, it provides a private alternative to Slack through the Mattermost platform, which facilitates secure collaboration among teams. The modern web interface, built on Cockpit, streamlines common administrative tasks and boasts a quick and straightforward installation process. This infrastructure is based on CentOS/RHEL, a widely used server distribution known for its routine security updates and exceptional stability, making it a reliable choice for various applications. With this setup, users can benefit from both functional versatility and robust security measures. -
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IPFire is an advanced, robust, and secure Open Source firewall built on the Linux platform. Its user-friendly interface, exceptional performance across various environments, and adaptability make it suitable for a wide range of users. Prioritizing security above all, IPFire is fortified to defend against online threats while simultaneously safeguarding your network from potential intrusions. The firewall's robust engine and its integrated intrusion prevention system work in tandem to shield your network from cyber attacks and denial-of-service threats. Developed as free software by a collaborative community, IPFire is trusted by hundreds of thousands of users globally. The core aim of IPFire is to ensure maximum security, and it is designed for easy configuration to establish a firewall engine that effectively blocks unauthorized access. By default, IPFire organizes the network into distinct zones with tailored security policies, such as LAN and DMZ, allowing for effective risk management and customized configurations to cater to specific requirements. This thoughtful design enhances the overall security posture of any network it protects.
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Clear Linux OS
Clear Linux Project
Clear Linux OS is a performance and security-focused open-source, rolling release distribution designed for customization and easy management, applicable from the Cloud to the Edge. It can function without any specific configurations, even on a generic host with a vacant /etc directory. Stateless systems distinctly separate the operating system's settings, individual system configurations, and user data stored on each machine. This design allows users to efficiently manage their personalized configurations in contrast to system-level settings. Clear Linux OS enhances performance across the entire stack, encompassing the platform, kernel, mathematical libraries, middleware, frameworks, and runtime components. Additionally, it features an automated tool that perpetually monitors for Common Vulnerabilities and Exposures (CVEs), ensuring they are promptly addressed. The clear distinction between User and System files not only simplifies customization but also facilitates easier management of the operating system's features and functionalities. As a result, users can enjoy a seamless experience while tailoring the system to their specific needs. -
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Zentyal
Zentyal
€195 per serverEasily connect Windows® clients to your domain with Zentyal, ensuring a seamless user experience without the need for user or device CALs. This solution incorporates reliable SMTP and POP3/IMAP mail servers, utilizing well-established technologies and protocols for optimal performance. It guarantees secure Internet access while effectively managing essential network infrastructure services. Users can benefit from software updates until the end-of-life date for each version, and support is readily available when needed. Zentyal serves as an intuitive alternative to Windows Server®, featuring native compatibility with Microsoft Active Directory® for straightforward management of Windows® clients. Furthermore, it allows for flexible deployment options, enabling Zentyal to function as a mail server, domain and directory server, or a comprehensive all-in-one server solution for your organization. This adaptability makes it an excellent choice for businesses looking to enhance their network management capabilities. -
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Clearo
2R Software GmbH
Digital waste management allows for transparency, control and optimization. Every day, you will face many challenges as a waste manager. Implementation of a sustainable waste management system. Mastery of legal obligations and requirements. Increasing the recycling rate Reduce waste costs Create meaningful reports Establishment of the zero waste vision. Clearo can help you improve your waste management. -
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ClearOS Mobile
ClearCenter
ClearOS Mobile empowers users to manage their digital identity, maintain privacy, and enhance security, all while granting access to essential Android applications. In the future, ClearOS Mobile aims to be compatible with a wide range of smartphone manufacturers, mobile network operators, and service providers. This versatility will further broaden its reach in the mobile ecosystem, making it accessible to a diverse group of users. -
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The ClearPath MCP and ClearPath OS 2200 operating systems offer a comprehensive and cohesive suite of software solutions tailored for managing your essential business operations. You will be well-prepared to handle even the most intensive applications with ease. Enjoy a variety of features, including advanced security measures, transaction management systems, databases, integration and development tools, among others. Additionally, you have the option to license the operating environment individually, allowing for transaction processing on public clouds, private clouds, or your preferred server hardware. The extensive selection of cross-platform software available within the ClearPath Forward ecosystem ensures that you will possess all the necessary resources to enhance and broaden the functionalities of both the ClearPath MCP and ClearPath OS 2200 systems. This versatility makes it an ideal choice for businesses looking to optimize their technology infrastructure.
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WinGate
WinGate
$109.95 one-time paymentWinGate Proxy Server serves as an efficient and versatile HTTP Proxy server, SOCKS server, and integrated Internet gateway, tailored to address the access control, security, and communication requirements of modern enterprises. With a diverse array of features, it offers flexible licensing options that can adapt to the budgets of different users, whether for a large corporation, a small business, or a residential network. This server enables the sharing of various types of Internet connections, permitting numerous users to browse the web, access email, and utilize other online applications as if they were directly online. Regardless of whether the connection is through a standard dial-up modem or a high-speed fiber line, WinGate Proxy Server enhances the overall usage of that connection. Furthermore, it is compatible with multiple Internet protocols, facilitating the functionality of applications including web browsers, messaging tools, FTP, and SSL. Overall, WinGate Proxy Server is an invaluable tool for any organization looking to streamline its internet access and improve security measures. -
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CommuniGate Pro
CommuniGate Software
Our comprehensive Unified Communications technology is anchored by the CommuniGate Pro platform. This system facilitates extensive Unified Communications through open APIs that allow seamless integration with various business applications. With the ability to scale to hundreds of millions of accounts, CommuniGate Pro is perfectly suited for large-scale alert systems, multimodal communications in web applications, or highly secure network architectures. Importantly, achieving such scale does not compromise efficiency or reliability; the platform is exceptionally agile and capable of supporting resilient applications in military and embedded environments. Furthermore, CommuniGate Pro has received approval for use by governmental agencies in both Europe and the USA. Its reputation for outstanding stability—boasting impressive uptimes akin to VMS—has made it a trusted choice among military, transportation, and research institutions. Additionally, the platform enables banks to efficiently manage email services for millions of clients while ensuring compliance with regulatory standards. The server's signaling capabilities can also be effectively implemented within a hybrid system, enhancing its versatility even further. This makes CommuniGate Pro a top-tier solution for organizations looking to optimize their communications infrastructure. -
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Courier
Double Precision, Inc.
FreeThe Courier mail transfer agent (MTA) serves as a comprehensive mail and groupware server that utilizes widely recognized protocols, including ESMTP, IMAP, POP3, LDAP, SSL, and HTTP. Within a unified framework, Courier delivers a range of services, such as ESMTP, IMAP, POP3, webmail, and mailing list functionalities, allowing users to easily enable or disable specific components as needed. Recently, the Courier mail server has introduced fundamental web-based calendaring and scheduling features within its webmail module, with plans for more sophisticated groupware calendaring capabilities to come shortly. Notably, the source code for the Courier mail server is designed to compile on most POSIX-compliant operating systems that utilize Linux or BSD-derived kernels, and it can also be successfully compiled on Solaris and AIX systems, provided users utilize the appropriate freeware add-on tools from Sun or IBM. The development of the Courier mail server is rooted in a combination of several interrelated projects that converged into its current form, and it also incorporates SMTP extensions specifically aimed at enhancing mailing list management functionality. In this way, Courier not only serves as a versatile mail server but also as a collaborative tool for users seeking effective communication solutions. -
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Scalix
Scalix
Enhance your Outlook experience through features like push email, personal information management, group scheduling, availability services, public folders, delegation, and additional functionalities. By utilizing fewer servers and attractive subscription models, you can boost your profit margins effectively. Furthermore, cut down on licensing expenses while capitalizing on your team's current expertise by adopting a Linux-based system. Scalix offers starter packs that serve as comprehensive, single-server messaging solutions tailored for smaller enterprises and organizations, delivering a complete suite of email and collaboration tools. The Scalix small business edition is specifically crafted for small enterprises, providing a rich array of business capabilities, including the ability to quickly recover deleted user-specific items, support for mobile devices, and various other essential features. This solution not only facilitates efficient communication but also empowers businesses to operate seamlessly in a competitive landscape. -
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mailcow
mailcow
FreeMailcow: Dockerized is a self-hosted email and groupware solution built on Docker technology. It incorporates a variety of established and reliable components that work together to create a hassle-free email server experience. Each application is encapsulated within its own container, all linked through a bridged network for seamless interaction and functionality. This modular approach enhances the scalability and maintainability of the server setup. -
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Mailtraq
Mailtraq
Mailtraq Professional mail server software serves as a comprehensive solution for businesses seeking efficient email management. It delivers all necessary functionalities at an affordable cost, eliminating common complications associated with email servers. As a perfect alternative to Microsoft Exchange, Mailtraq is user-friendly to deploy and straightforward to oversee. With attractive licensing fees, no server client access licenses (CALs), and reliable performance, Mailtraq is the go-to choice for small to medium-sized businesses and home offices. Email plays a crucial role in the operations of any organization, and the security of stored messages is essential for the sustained success of your company. Although managing your own email server can involve some level of complexity and costs, it provides you with total physical control over who accesses your email communications. In contrast, utilizing your internet service provider's email service raises privacy concerns, as their administrators can access and read your messages. Likewise, relying on a software-as-a-service (SaaS) provider for hosted email solutions means you may not only be unaware of who is accessing your emails but also lack information about the physical location of your data storage. Therefore, opting for Mailtraq ensures both control and peace of mind regarding your email integrity and confidentiality. -
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Oracle Communications Messaging Server is an Internet messaging solution built on standards, aimed at providing robust and high-capacity message handling for both service providers and their end-users. This versatile Messaging Server accommodates various email protocols and is capable of managing a wide array of content types, including embedded text, audio, graphics, video files, and other formats. Its design ensures reliability and efficiency in message delivery, making it a preferred choice for organizations seeking effective communication tools.
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Salix
Salix
FreeSalix is a streamlined GNU/Linux distribution that is derived from Slackware, emphasizing simplicity, speed, and user-friendliness, with a strong focus on stability. It maintains full compatibility with Slackware, allowing users to access Salix's repositories as an additional high-quality source for their preferred distribution. Comparable to a carefully cultivated bonsai, Salix is designed to be compact and lightweight, resulting from meticulous attention to detail. The ISO includes everything necessary for installation, featuring a complete desktop environment along with a well-rounded selection of applications that adhere to the principle of "one application per task." However, it includes only the essential components needed to initiate a console system, intentionally omitting a graphical interface. This makes Salix particularly suitable for advanced users who wish to tailor their installation for specific functions, such as setting up a web or file server, allowing for a highly personalized computing experience. Additionally, users can appreciate the flexibility offered by Salix to create a customized environment that meets their unique needs. -
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iRedMail
iRedMail
FreeThe optimal approach to constructing your mail server using open source software is to utilize platforms such as CentOS Stream, Rocky, Alma, Debian, Ubuntu, FreeBSD, and OpenBSD. By employing iRedMail, you can set up a FREE, OPEN SOURCE, and COMPLETELY FUNCTIONAL mail server in just a few minutes. We have taken care of the complexities by assembling all necessary open source components and implementing best practices, allowing our product to handle all essential tasks on your behalf. In addition, we provide professional support to assist you should you encounter any issues. You maintain complete ownership of your personal data stored on your hard drive, giving you the ability to control email security and review transaction logs. No external organization has access to the content of your communications. All components integrated into iRedMail are based on open source software, ensuring you receive bug fixes and updates from reputable Linux/BSD vendors. With iRedMail, you are not only building a mail server but also gaining peace of mind knowing that your email system is secure and private. In this way, iRedMail stands out as the definitive solution for those looking to establish a mail server using open source software. -
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hMailServer
hMailServer
Free 1 RatinghMailServer is a complimentary and open-source email server designed for the Microsoft Windows platform. It is utilized globally by various entities, including internet service providers, businesses, governmental organizations, educational institutions, and individual users with a passion for technology. The server accommodates standard email protocols such as IMAP, SMTP, and POP3, making it compatible with numerous existing webmail systems. Additionally, it features a customizable score-based spam protection system and can be integrated with virus scanners to ensure that all incoming and outgoing emails are thoroughly checked for threats. This versatility makes hMailServer a popular choice for those seeking a reliable email solution. -
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Mailu
Mailu
FreeMailu is a versatile and straightforward mail server offered through a collection of Docker images, designed as free and open-source software that encourages user feedback and contributions. The objective of this project is to deliver an easy-to-install and maintain mail server that is comprehensive and avoids the inclusion of proprietary tools or unrelated features that are frequently part of mainstream groupware solutions. Key functionalities of Mailu encompass: A standard email server setup supporting IMAP and IMAP+, SMTP, and Submission with automated configuration profiles for various email clients. Sophisticated email capabilities, including aliases, domain aliases, and custom routing options. Web-based access featuring multiple webmail interfaces alongside an administrative dashboard. User-centric functionalities such as aliases, auto-reply, auto-forward, and the ability to fetch accounts from other servers. Administrative features that cater to global management, making announcements, domain-specific delegation, and setting quotas. Robust security measures that enforce TLS protocols, integrate DANE and MTA-STS, utilize Let's Encrypt for certificates, provide outgoing DKIM signatures, and incorporate an anti-virus scanner alongside Snuffleupagus for enhanced protection against malware and harmful attachments. Effective anti-spam tools that include auto-learning algorithms, greylisting techniques, DMARC and SPF support, and measures to prevent email spoofing. Overall, Mailu stands out as a comprehensive solution for users seeking a reliable and secure mail server environment. -
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Windows Server
Microsoft
$501 one-time payment 1 RatingWindows Server 2022 brings forth enhanced multi-layered security features, hybrid functionalities with Azure, and a versatile application platform. Begin by fortifying your organization's security framework right from the operating system. Expand your data center capabilities to Azure to achieve improved IT efficiency. Equip developers and IT professionals with a robust application platform designed for building and deploying a range of applications. Discover how using Azure can lead to significant cost reductions through programs like the Azure hybrid benefit and extended security updates. Transform your workloads using Azure, recognized as the reliable cloud solution for Windows Server. Seamlessly connect your on-premises Windows Servers to Azure via Azure Arc. Upgrade to the latest operating system to enjoy superior security, enhanced performance, and increased value. By leveraging Azure, you can now fully tap into the myriad advantages of cloud computing. Starting is free, enabling you to manage servers, clusters, hyper-converged infrastructure, and Windows 10 PCs effectively with Windows Server, making your transition to cloud services smoother and more efficient than ever before. -
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MidnightBSD
MidnightBSD
FreeIt encompasses all the essential software necessary for your everyday activities—such as email, internet browsing, document editing, gaming, and a plethora of additional applications. MidnightBSD, supported by a small yet passionate group of developers, aims to build an accessible operating system that is available for everyone to use at no cost. This system is compatible with x86, AMD64 architectures, and can also be run as a Virtual Machine. While the FreeBSD project has established a robust server operating system, it frequently neglects the usability and performance aspects required for desktop environments. It is crucial to customize scheduling, resource allocation, security measures, and application support to better serve desktop users. Many BSD-based projects are designed primarily for server use or older systems, and while some offer FreeBSD with a user-friendly graphical interface, they still suffer from an underlying server-oriented structure. Our decision to fork FreeBSD was not due to any conflict, but rather because we saw it as an exceptional foundation to build upon. Ultimately, our goal is to bridge the gap between server efficiency and desktop user experience. -
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GMS (Gordano Messaging Suite)
Gordano
As a business on the rise, maintaining strong connections is essential, and that means you definitely need email services. However, managing daily operational hurdles can be overwhelming, and that's where we come in. You're in the perfect place for assistance. GMS has been a trusted name since the dawn of email, bringing a wealth of experience in catering to customer needs. We understand your challenges because we share your commitment to your business. Our approach is straightforward: we avoid complex jargon and strive for clarity. With GMS, you receive the perfect email solution tailored for small enterprises, along with comprehensive support. Transitioning to the Cloud means businesses and individuals can eliminate concerns about power needs, physical space, or software upgrades. With cloud computing, the burden of physical storage and ongoing maintenance is lifted, resulting in a markedly lower total cost of ownership. Ultimately, this shift empowers you to focus more on your business and less on IT concerns. -
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SOGo
SOGo
SOGo is a reliable and well-supported groupware server designed with an emphasis on scalability and adherence to open standards. Released under the GNU GPL/LGPL v2 and later, SOGo features an advanced AJAX-based web interface while accommodating various native clients by utilizing standard protocols like CalDAV, CardDAV, and GroupDAV, in addition to Microsoft ActiveSync. Acting as the crucial link within your infrastructure, SOGo provides users with a cohesive and comprehensive interface for accessing their data. Its effectiveness has been demonstrated in production settings that cater to thousands of users, ensuring robust performance and efficiency. Overall, SOGo enhances collaboration and information retrieval within organizations of any size. -
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Unisys ClearPath Forward MCP
Unisys
For computing needs that require the highest levels of security, resilience, availability, and scalability while ensuring maximum business agility, ClearPath Forward serves as a key platform for simplification, cost management, and digital transformation. Enhance your workforce, improve efficiency, and accelerate the digital transformation of your ClearPath Forward environment through a managed service solution with cloud hosting that is expertly managed, maintained, and optimized by Unisys. Develop a clear and actionable plan that details how to adapt your applications to meet evolving demands with the assistance of ClearPath Forward Advisory Services and ClearPath Forward Application Evolution Services. Take advantage of a comprehensive array of advisory and implementation services designed to facilitate the smooth transition of your ClearPath Forward environment to either private or public cloud solutions, ensuring that you remain competitive in a rapidly changing market. By leveraging these services, organizations can achieve a seamless integration of their systems into the modern cloud landscape. -
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OpenSMTPD
OpenSMTPD
FreeOpenSMTPD serves as a free implementation of the SMTP protocol for server-side email communication, as laid out in RFC 5321, and incorporates several additional standard extensions. This software enables standard machines to facilitate email exchanges with other systems that also utilize the SMTP protocol. Born from a desire for a more satisfactory alternative to existing solutions, OpenSMTPD offers a comprehensive SMTP implementation. The project is mainly driven by developers Gilles Chehade and Eric Faurot, alongside contributions from numerous OpenBSD developers and collaborators from various other communities. Its development reflects a commitment to improving email server functionality and reliability across different platforms. -
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MailEnable
MailEnable
$349MailEnable offers a comprehensive solution for secure email and collaboration services, gaining recognition in a recent independent survey as the leading Windows Mail Server Platform globally. Whether you are a large hosting provider catering to numerous users or a small business managing a single domain, MailEnable delivers a solution that is sure to satisfy your email users. The Windows Mail Server software from MailEnable boasts features that rival those of Microsoft Exchange, including robust messaging protocols like Exchange ActiveSync, IMAP, SMTP, and POP3, along with collaborative tools such as calendaring (CalDAV), contacts (CardDAV), tasks, and notes. This extensive feature set ensures that users have access to everything they need for seamless communication and organization. -
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Dovecot
Dovecot
FreeDovecot stands out as a remarkable option for installations of any size, whether small or large. Notably, it ranks among the top IMAP servers, offering robust performance while seamlessly supporting both mbox and Maildir formats. Its mailboxes come with transparent indexing that enhances speed and retains full compatibility with traditional mailbox management tools. Adhering to industry standards, Dovecot successfully passes all compliance tests for IMAP servers, unlike many of its competitors that often fall short. One of its impressive features is the self-optimizing indexes, which provide just the necessary information that users typically require without excess. Additionally, Dovecot incorporates self-healing capabilities, autonomously addressing many issues it detects, such as corrupted index files, while ensuring that any problems encountered are logged for further investigation by administrators. Furthermore, Dovecot is designed with user-friendliness in mind, as it aims to present common error messages in a straightforward and comprehensible manner, making it easier for administrators to resolve issues. Overall, Dovecot's combination of performance, compliance, and user-centric features makes it a top-tier choice for email server solutions. -
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Modoboa
Modoboa
FreeTake back your autonomy and safeguard your personal information by setting up your own email server, a process that can be completed in under 10 minutes! With Modoboa, you can establish your email server at no cost in less than 10 minutes. When it comes to establishing a mailbox, you typically have a few choices: - Rely on services provided by internet and infrastructure companies (like Orange, Vodafone, OVH, or Gandi), which often require a monthly or annual fee, but they come with limitations on customization, configuration options, and the number of domains and mailboxes you can use. - Opt for free email services (such as Gmail, Live, or Yahoo), which come with restrictions and often exploit your data for commercial gain. - Set up your own email server, although this usually demands a significant level of technical expertise for proper installation and configuration. Modoboa presents a viable alternative to these three options. It liberates you from the constraints of traditional email providers, allowing anyone to create a secure email server independently. Best of all, this entire process takes less than 10 minutes and is completely free of charge. Embrace the freedom of managing your own email with ease! -
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IBM z/VM
IBM
IBM z/VM is a sophisticated operating system that features a hypervisor and virtualization technology, designed to effectively manage guest servers like Linux, z/OS, and z/TPF virtual machines, as well as Red Hat OpenShift on IBM Z and LinuxONE systems. This platform is capable of operating hundreds or even thousands of guest servers on a single IBM Z or LinuxONE server with remarkable efficiency and adaptability. It accommodates various machine images and architectures, which streamlines the migration process, eases application transitions, and enables the consolidation of multiple systems onto one server. By excelling in resource sharing among virtual machines, IBM z/VM provides outstanding scalability, security, and efficiency, resulting in significant cost reductions and creating a solid foundation for cognitive computing. Its implementation supports on-premises cloud computing within a hybrid cloud framework, allowing organizations to efficiently scale and manage thousands of Linux and container workloads. Moreover, it aids in maintaining continuous availability through IBM's robust resiliency offerings, ensuring that businesses can rely on their infrastructure without interruption. This versatility makes IBM z/VM a critical asset for modern enterprises looking to optimize their IT environments. - 29
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SmarterMail
SmarterTools
$500.00/one-time SmarterMail is the ideal Microsoft Exchange alternative. First, it's the only business email server on the market that offers native support for the protocols that power Exchange: MAPI, EWS, and EAS. It does this without the need for any additional software or plug-ins for Microsoft Outlook or other clients -- desktop and mobile! Best of all, it offers all of the features of Exchange, but at a FRACTION of the cost. In addition, features like audio and video group chat, and Online Meetings for team meetings and group collaboration are included at no extra charge. It's designed to provide the functionality businesses need, without sacrificing secure, reliable access to business, and personal, communication. -
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MDaemon Email Server
MDaemon Technologies
$360 per year 7 RatingsMDaemon Email Server supports IMAP and SMTP protocols. It delivers solid performance thanks to its feature-rich, user-friendly design. The email server software is low in total cost of ownership (TCO), and is specifically designed to meet the needs small- to medium-sized businesses. MDaemon supports multiple languages, content filtering, and multiple domains. It also offers flexible administration and an open standard design. -
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HP-UX
Hewlett Packard Enterprise
Experience a robust UNIX operating system and its associated tools that ensure unparalleled availability, reliability, and security for mission-critical HPE Integrity servers. By leveraging this highly integrated UNIX platform, you can enhance operational efficiency while maintaining the highest standards of reliability and security for your essential HPE Integrity servers. HP-UX creates a dynamic and secure environment, seamlessly integrated into mission-critical HPE Integrity servers, allowing you to address your specific UNIX demands. With four distinct operating environments, HP-UX is designed to cater to diverse needs effectively. The system also emphasizes comprehensive server security and management, incorporating HPE Systems Insight Manager, which provides essential functionalities such as power management, health monitoring, and deployment tools. Furthermore, it includes extensive performance analysis resources for both kernel processes and applications, ensuring optimal functionality. Safeguarding your organization’s most vital applications and services is crucial in maintaining your business's trajectory toward success. With these capabilities, you can confidently navigate the complexities of modern computing environments. -
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Cyrus IMAP
The Cyrus Team
FreeCyrus IMAP serves as a server for emails, contacts, and calendars, and is available as free and open-source software. Among its many features are high-speed performance, strong security measures, and efficient resource management. Additionally, it includes powerful search capabilities and supports both CardDAV and CalDAV protocols. The platform ensures robust data storage and offers replication features, making it suitable for large-scale installations. Flexible filtering through Sieve allows for customizable email handling, while integration with antivirus and antispam toolkits enhances its security. Moreover, Cyrus IMAP effectively manages deliverability standards such as SPF, DKIM, and DMARC. It provides extensive authentication possibilities through Cyrus SASL and includes support for JMAP, alongside a comprehensive array of supported standards that enhance its versatility. Overall, Cyrus IMAP is an ideal solution for organizations seeking a reliable and feature-rich email server. -
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MailSite Fusion
Rockliffe Systems
$90 per yearMailSite Fusion serves as a comprehensive email, calendar, and contact server for Windows, offering seamless over-the-air synchronization with various smartphones, full native Outlook integration, an advanced AJAX web client, and a server for sharing calendars and contacts, which can also sync and publish to multiple other clients. For three consecutive years, it has consistently ranked among the top three mail server products according to the readers of Windows IT Pro Magazine. Given the essential nature of email services to your organization, it is crucial to choose a reliable product from a company that has demonstrated expertise in communication software. So, what makes this mail server stand out? Rockliffe has dedicated itself to the development and enhancement of email server and security solutions for businesses and service providers since 1995, addressing your concerns with a sense of urgency. Engineered from the ground up to prioritize speed, stability, and security, MailSite Fusion is equipped to fulfill your most pressing needs and expectations effectively. Moreover, its robust features ensure that you can manage your communications seamlessly while maintaining a high level of security. -
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Ubuntu Server
Ubuntu
Ubuntu Server offers both economic and technical scalability for your data center, whether it is public or private. Whether your goal is to establish an OpenStack cloud, a Kubernetes cluster, or a massive 50,000-node render farm, Ubuntu Server provides unparalleled scale-out performance that delivers exceptional value. You can seamlessly deploy a variety of applications, including NoSQL databases and web farms, without any hassle. With certification from leading hardware manufacturers and a robust set of deployment tools, you can maximize the efficiency of your infrastructure. The regular release cycle ensures that you always have access to the latest and highest performing open-source solutions. Additionally, its lightweight initial installation combined with integrated deployment and application modeling technologies positions Ubuntu Server as an ideal choice for straightforward deployment and scaled management. Ultimately, this makes it an excellent option for organizations seeking to optimize their operational efficiency and resource utilization. -
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iMin OS
iMin Technology
Upon powering on the device, the settings and preferences menu appears immediately, allowing for quick and convenient configuration of settings. The iMin UI is an operating system that has been extensively optimized from the Android system to cater specifically to intelligent commercial equipment, enhancing overall system performance based on interactive experiences and real-world applications. Users can activate private mode to prevent applications from operating without the system navigation bar and to block unsolicited notifications. For troubleshooting any product usage issues, the user manual serves as a valuable resource, offering straightforward and efficient solutions. Should users encounter any difficulties with the product, consulting the user manual is highly recommended for immediate assistance. Additionally, the remote control function enables technicians to offer help remotely, making it almost as convenient as hands-on operation. Furthermore, the hardware butler feature allows users to quickly grasp the status of the device at a single glance, ensuring they stay informed about its performance. This comprehensive approach ensures that users have all the necessary support at their fingertips. -
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FreeBSD
FreeBSD
FreeFreeBSD stands out with its sophisticated networking, exceptional performance, security, and compatibility elements that many other operating systems, including several top commercial options, still lack. It serves as a prime choice for both Internet and Intranet servers, delivering reliable network services even under extreme loads while efficiently managing memory to ensure excellent response times for numerous simultaneous user processes. Moreover, FreeBSD extends its advanced operating system capabilities to both appliance and embedded systems, accommodating a diverse range of hardware platforms such as higher-end Intel-based devices, as well as ARM, PowerPC, and MIPS architectures. Vendors globally depend on FreeBSD for their embedded products, which encompass everything from mail and web appliances to routers, time servers, and wireless access points, thanks to its integrated build and cross-build environments. Additionally, the Berkeley open-source license allows these vendors the flexibility to determine the extent of their contributions back to the community, fostering collaboration and innovation. This combination of features makes FreeBSD an invaluable asset for developers aiming to create high-performance embedded solutions. -
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Apache James
The Apache Software Foundation
FreeJames represents the Java Apache Mail Enterprise Server, featuring a modular structure that utilizes a comprehensive collection of contemporary and effective components. This architecture ultimately delivers fully-functional, stable, secure, and extendable mail servers that operate on the Java Virtual Machine (JVM). You can craft a tailored email management solution by selecting the necessary components, thanks to the Inversion of Control mail platform it offers. Additionally, you can enhance your email processing capabilities by customizing filtering and routing rules through the James Mailet Container. The Apache James project integrates various libraries that constitute James, ensuring that the services are readily available for download from Apache mirrors, making it easier for users to implement their email solutions. As a result, this flexibility allows for significant customization to meet diverse communication needs. -
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Axigen
Axigen Messaging
$266 per yearProvide your clients with reliable, enterprise-grade email hosting alongside a range of additional services. This outstanding option caters to service providers and is adaptable for a user base ranging from thousands to millions. Attract more clients by presenting a top-tier email server solution renowned for its flexibility, seamlessly integrating with your current systems. You can oversee your email, coordinate and share calendars, and synchronize your mobile devices, all supported by a robust and secure mail server. This solution is ideal for organizations of any scale. Axigen possesses extensive expertise; explore its diverse functionalities and select the ones that align with your needs. Effortlessly manage your emails while enhancing productivity with tools for calendars, tasks, and notes. Experience user-friendly browser functionality with features like keyboard shortcuts, drag-and-drop capabilities, real-time email viewing, frequently accessed folders, customizable email filters, vacation replies, and personal blacklist/whitelist options, ensuring a comprehensive email management experience. With such a versatile system, businesses can streamline their communication effectively. -
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Eudora Internet Mail Server
Eudora Internet Mail Server
FreeThe relay restrictions have been entirely reimagined to feature a more user-friendly interface that allows for enhanced control over relay security measures. Additionally, EIMS introduces its own Domain Name Resolver (DNR), designed to address issues present in the Open Transport DNR and to improve performance compared to the OS X DNR, although it currently lacks support for non-recursive DNS configurations. Furthermore, a new SMTP Submit port has been added, operating on TCP port 587 by default, mirroring the functionality of the standard SMTP port; this is particularly beneficial for clients whose ISPs restrict access to port 25. An option to set a maximum number of recipients per message has been incorporated, and the previously mandatory Expand SMTP Addresses feature can now be disabled, a change from EIMS versions 3.1 and earlier where it was always enabled. In addition, the SMTP server on both ports 25 and 587 is now equipped to log Telnet connections and recognize activities resembling port scans, enhancing security monitoring capabilities. Overall, these updates aim to provide users with greater flexibility and security when managing their email services. -
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Mercury Mail Transport System
Pegasus
Mail from external sources is collected by Mercury and deposited into the designated mailbox of the recipient, enabling the user to retrieve it whenever they wish. When local users wish to send messages to the outside, these messages are forwarded to Mercury, which manages the delivery process, alleviating the workload on the user's device and permitting them to focus on other tasks. With a dialup connection, only the mail server needs to have access to that link, meaning individual workstations do not require their own modems or Internet connections. This setup allows the mail server to continue managing email even if the client workstations are powered down, thereby supporting functionalities that require constant service availability, such as automatic replies and auto-forwarding. As a result, users enjoy a seamless experience without the need for constant vigilance over their email communications. -
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EnviMonitor
DTM Datentechnik Moll
€3,000Sophisticated monitoring solutions designed for server rooms and data centers are now available through a web-based application that requires no software installation and is manufacturer-independent. This application is accessible from any device with web capabilities, allowing users to conduct remote monitoring seamlessly. EnviMonitor empowers users to oversee environmental conditions in server rooms using smartphones and tablets from Android, Apple, and Windows platforms, all without the need for additional software installation. Its user-friendly interface and well-organized layout have earned it recognition from the professional jury of the German Data Center Award, thanks to its exceptional cost-to-performance ratio. With EnviMonitor, users can easily visualize the status of monitored components through an intuitive display featuring graphic tiles that represent various sensors, which can be grouped for better organization. This innovative software solution not only enhances monitoring efficiency but also simplifies the management of critical data center environments. -
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SUSE Linux Enterprise Real Time
SUSE
$2,199 per yearSUSE Linux Enterprise Real Time serves as a real-time operating system that minimizes latency and enhances the predictability and reliability of time-sensitive, essential applications, whether it’s an IoT sensor keeping tabs on industrial equipment or an edge system that requires immediate responses to external stimuli. Various sectors, including banks, manufacturers, and government entities, depend on applications that must function with precision and reliability under all circumstances. For distributed systems to operate cohesively, they require time synchronization not just within individual servers but also among all interconnected servers. The Precision Time Protocol (PTP) achieves this by synchronizing servers over high-speed networks, boasting accuracy down to sub-microsecond levels. It also features support for device interrupt threads, allowing for optimization at the device level, along with hardware latency detectors to maintain consistent application behavior. With SUSE Linux Enterprise Real Time, you gain a crucial competitive edge in timing efficiency, ensuring your applications run smoothly and reliably. This ensures that your business can respond agilely to market demands while maintaining high standards of performance. -
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Scientific Linux
Scientific Linux
Scientific Linux, a project backed by Fermilab, primarily serves the High Energy and High Intensity Physics community, although its user base extends across various industries globally, and occasionally into space. This operating system is essentially a rebuild of Red Hat Enterprise Linux, which is owned by Red Hat Inc (NYSE:RHT), and is often referred to as “The Upstream Vendor” or “TUV” within our communications. By using the term TUV, we emphasize that Scientific Linux operates independently and is neither formally associated with nor endorsed by the upstream entity, thereby clarifying this important distinction. Designed to provide a stable, scalable, and extensible platform, Scientific Linux supports scientific research by offering methodologies that facilitate the integration of scientific applications with their operating environment. The initiative encourages the free exchange of ideas, designs, and implementations, all aimed at establishing a robust computing platform for future advancements in technology. Ultimately, this collaborative effort strives to foster innovation in scientific computing, paving the way for breakthroughs that can benefit a diverse range of fields. -
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SUSE Linux Enterprise Server (SLES) is a powerful and secure operating system tailored for enterprises and organizations, providing a scalable and reliable foundation for critical workloads and applications across diverse environments, whether physical, virtual, or cloud-based. This operating system boasts advanced capabilities like high availability, virtualization, and seamless cloud integration, making it well-suited for the deployment of sophisticated IT infrastructures. Renowned for its stability and long-term support, SLES ensures that organizations can maintain a secure and consistent operational environment over extended periods. Moreover, SUSE's management tools facilitate efficient configuration and automation, which greatly simplifies server deployment and ongoing maintenance tasks. It accommodates a variety of hardware architectures, including x86_64, ARM, and IBM Power, thus offering the necessary flexibility to meet differing business demands. Additionally, SUSE Linux Enterprise Server is designed for optimal performance and comes equipped with robust security features to protect valuable data and resources. With its comprehensive support and innovative features, SLES stands out as an exceptional choice for businesses aiming to enhance their IT capabilities.