Compare Claws Mail vs. Letterbox

Secure your company’s communications with Proton Mail — the business email solution trusted by over 50,000 organizations. With end-to-end encryption built in, your internal and external communications stay confidential by default. Proton Mail helps your business meet GDPR, HIPAA, and other compliance standards, while giving you full control over your data under strong Swiss privacy laws. Empower your team with encrypted email and calendar, support for your custom email domains, professional branding, and simple migration from providers like Google Workspace or Microsoft 365 — no IT team required.

Google Workspace is an all-in-one cloud productivity platform developed by Google to help businesses manage communication, collaboration, document creation, and workflow automation from a centralized environment. The platform combines professional email, cloud storage, video conferencing, document editing, team messaging, scheduling, and AI-powered assistance into one subscription-based ecosystem optimized for modern work environments. Google Workspace includes applications such as Gmail, Google Drive, Google Meet, Docs, Sheets, Slides, Calendar, Chat, Keep, Forms, Sites, NotebookLM, and Gemini AI, enabling teams to work together seamlessly across devices and locations. One of the platform’s core strengths is its built-in AI functionality powered by Gemini, which helps users draft emails, summarize meetings, generate research insights, automate repetitive tasks, and improve productivity using contextual awareness from workplace data. Google Workspace also supports advanced collaboration features including real-time editing, appointment scheduling, eSignatures, document sharing, cloud storage management, and AI-assisted research tools. Businesses benefit from enterprise-grade security features such as AI-powered threat protection, data classification, endpoint management, Data Loss Prevention, secure access controls, and compliance support for enterprise environments. The platform offers scalable pricing plans suitable for startups, small businesses, enterprises, educational institutions, nonprofits, and government organizations. Google Workspace also simplifies data migration and onboarding with built-in migration tools and partner support for transferring emails, files, and business information securely into the cloud.

MobiOffice (formerly OfficeSuite) is an easy-to-use office suite alternative, used by over 250 million users across 195 countries. Available on Windows, Android, iOS, and macOS, MobiOffice includes MobiDocs, MobiSheets, and MobiSlides. MobiOffice helps you manage text documents, spreadsheets, and presentations with ease. It's compatible with all major file formats including Microsoft Office (DOCX, ODT, PPTX), Google (Docs, Sheets, Slides), Apple iWork, and more. Explore each component: MobiDocs: Create and modify documents with comprehensive formatting options. MobiSheets: Simplify data management and analysis to visualize insights and generate reports effortlessly. MobiSlides: Craft impressive presentations with customizable templates and multimedia capabilities. MobiOffice integrates with MobiDrive, MobiSystems’ cloud storage solution for easy document saving and synchronization. Try it free for 7 days to see how this office suite meets your needs. Optimized for all major platforms, MobiOffice’s components - MobiDocs, MobiSheets, and MobiSlides - are available as a complete suite or as standalone apps on Windows, delivering tailored and affordable solutions that suit individual needs.

Shift puts you in control of your browser. Arrange apps, bars, and controls exactly where you want them, building a personalized workspace that works around you — not the other way around. Connect over 1,500 web apps, jump between dedicated Spaces for work, side hustles, and personal browsing, and manage multiple accounts without ever logging in and out. As a pioneer in carbon-neutral browsing, Shift is committed to rethinking what a browser can be — for the people who use it and the world they live in. Started in Victoria, British Columbia in 2016, Shift is a Certified B Corp and proud member of the Redbrick portfolio. What you can do with Shift: - Build your browser: Design a layout tailored to how you use the internet. - Create Spaces: Keep work, side hustles, and passion projects in their own lane. - Integrate Apps: Bring your favorite web apps together in one place. - Templates: Pick from 6 ready-made layouts to get started fast. - Shift AI: A built-in AI assistant that helps you get more done across every tab and app.

NewOrg is a robust platform that allows non-profit organizations to integrate information from all areas of their operations. This allows them to better manage clients, volunteers, services, donors, donations and outcome. It also provides the ability to schedule activities, sign-ups, communications, surveys and fundraising activities. NewOrg is a powerful platform that can help you manage your committees, donors, events, and memberships to ensure that your organization runs smoothly.

Install-free PDF editing, form filling, redaction, signing, viewing, and more on your website with RAD PDF! Packaged as an easy to use library / WebControl (compatible with .NET 3.5+, .NET Core, and .NET 5+), RAD PDF can be used with just about any flavor of ASP.NET including MVC, Razor, Blazor, WebForms, and more. RAD PDF is compatible with 99% of internet browsers, including those on Linux, Mac OS X, Microsoft Windows, and mobile. No plugins. No Adobe Reader. RAD PDF is more than a PDF to HTML converter. It natively supports all the most common PDF features including annotations, bookmarks, form fields, page labels, and more. With advanced PDF options, RAD PDF allows you to selectively enable and disable features not available with Adobe Acrobat Reader, like protecting a PDF from being downloaded while still viewable online. RAD PDF users can use PDF form fields directly from the web browser by enabling PDF form filling and PDF form saving without having to install any software. Integrating directly with ASP.NET, RAD PDF allows your web application to capture input data, build custom workflows, and provide an intuitive graphical user interface (GUI) for just about any online PDF interaction imaginable!

BrandMail®, created by BrandQuantum, is an innovative software tool that integrates seamlessly with Microsoft Outlook, enabling all employees within the organization to automatically generate emails that consistently reflect the brand through an easy-to-use toolbar that grants access to brand guidelines and the most current pre-approved materials. With this solution, email signatures are crafted according to your branding requirements, ensuring a uniform appearance regardless of the device or platform used to view them. These signatures are secure and managed from a central location, providing peace of mind regarding their integrity. Notably, users can view their signatures, banners, and surveys when composing, replying to, or forwarding emails. Unlike other solutions, BrandMail does not redirect emails through external servers nor does it modify the rules within your exchange environment, functioning entirely within Microsoft Outlook. By utilizing BrandMail, organizations can turn every email into a branding opportunity while also reducing the security vulnerabilities linked to the manipulation of HTML signatures, thereby enhancing both brand consistency and cybersecurity. This not only streamlines communication but also reinforces the brand identity across all employee interactions.

PostScan Mail is a virtual mailbox service that provides individuals and businesses with a convenient and secure way to manage their postal mail online. With PostScan Mail, users can access their physical mail from anywhere in the world through their digital devices. The service allows users to view and manage their mail, receive notifications of new mail items, forward mail to any address, scan and shred unwanted mail, and even deposit checks remotely. PostScan Mail eliminates the need for physical mailboxes and offers a practical solution for people who are always on the go or live in multiple locations. It is a modern and efficient way to manage your postal mail, making your life easier and more streamlined.

Click2Mail transforms traditional mail with its online and on demand, SaaS print to-mail service. Click2Mail gives users access to tools that make it easy to create and mail postcards, letters, and other printed materials. Individuals and organizations can use Click2Mail's easy-to-use Mailing Online Publisher to create, address, and ship mailpieces from anywhere on the globe.

MobiPDF (formerly PDF Extra) is an intuitive reader and editor that allows you to read, edit, create, OCR, organize, annotate, fill and sign, convert, and share any PDF. This makes MobiPDF an excellent choice for users seeking a budget-friendly alternative to Adobe Acrobat Pro. HERE’S WHAT YOU GET WITH MOBIPDF: Multiple Page View Modes: Enjoy a distraction-free "Read Mode". Advanced Editing Tools: Experience a Word-like PDF editing environment. Two-Way Conversions: Convert PDFs to and from Word, Excel, PowerPoint, or image formats. OCR Support: Make scanned documents searchable. Markup Tools: Highlight, comment, strikethrough, stamp, and more to enhance your documents. Effortless PDF Organizer: Reorder, compress, split, and combine PDFs with ease. Sign & Secure: Add signatures, create and fill forms, and protect your PDFs with passwords, encryption, and digital certificates. Offline Mode: Work freely on your projects, even offline. Seamless translation: One-click translate any PDF into 50+ languages.