Best Free DNS Security Software of 2025

Control D is a customizable DNS filtering and traffic redirection platform that leverages Secure DNS protocols like DNS-over-HTTPS, DNS-over-TLS and DNS-over-QUIC, with support for Legacy DNS. With Control D you can: block malicious threats, block unwanted types of content network wide (ads & trackers, IoT telemetry, adult content, socials, and more), redirect traffic using transparent proxies and gain visibility on network events and usage patterns, with client level granularity. Think of it as your personal Authoritative DNS resolver for the entire Internet that gives you granular control over what domains get resolved, redirected or blocked.

At SafeDNS, we are committed to creating a safer and more secure online environment for SMBs, enterprises, ISPs, MSPs, OEMs, and Education. We have a global footprint, making the internet safer for millions of users in over 60 countries. With years of experience in the field of cybersecurity and DNS filtering, we offer cutting-edge solutions to safeguard your digital life. Our innovative technologies help you stay protected against malware, phishing attacks, inappropriate content, and more. SafeDNS currently serves over 4000 institutions and home users around the world.

Cloudflare is the foundation of your infrastructure, applications, teams, and software. Cloudflare protects and ensures the reliability and security of your external-facing resources like websites, APIs, applications, and other web services. It protects your internal resources, such as behind-the firewall applications, teams, devices, and devices. It is also your platform to develop globally scalable applications. Your website, APIs, applications, and other channels are key to doing business with customers and suppliers. It is essential that these resources are reliable, secure, and performant as the world shifts online. Cloudflare for Infrastructure provides a complete solution that enables this for everything connected to the Internet. Your internal teams can rely on behind-the-firewall apps and devices to support their work. Remote work is increasing rapidly and is putting a strain on many organizations' VPNs and other hardware solutions.

It is very difficult to find data to show people who don’t care about malware. Although people may not be able to provide the exact details, almost everyone is aware that it's a serious threat. FlashStart blocks botnets, ransomware, malware, and other threats using global, top-class protection streams. You can block any web content that you find inappropriate by using content filtering. These sites could be dangerous, distracting, and unsavoury. Pro+ includes a secure, downloadable app. All devices are protected by centralized FlashStart protection at the home-office, cafe, and anywhere else. No router dependency. The idea is to optimize the filter to meet your individual needs. This is not an appliance. It is a lightweight application that runs on the existing IT systems of the end user. It should allow a low latency performance of less than 5ms.

NextDNS offers comprehensive protection from various security risks, effectively blocking advertisements and trackers across websites and applications while ensuring a secure and monitored online experience for children on all devices and networks. You can assess your security needs and customize your protection by activating over ten different safety measures. By utilizing reliable threat intelligence feeds that contain millions of harmful domains and update constantly, you can enhance your defense mechanisms. Our system goes beyond merely tracking domains; it evaluates DNS queries and responses instantaneously, allowing for the swift identification and prevention of harmful activities. Given that there is often only a brief window of hours from when a domain is registered to when it is used in an attack, our advanced threat intelligence framework is designed to identify malicious domains more efficiently than traditional security methods. Additionally, you can effectively eliminate advertisements and trackers in both websites and applications, including even the most sophisticated ones, by leveraging the most widely used ad and tracker blocklists, which include millions of domains that are refreshed in real-time. Ultimately, NextDNS empowers users with tools to create a safer browsing environment tailored to their specific security needs.

Cisco Umbrella offers robust defense mechanisms against various online threats, including malware, phishing, and ransomware. OpenDNS serves as a collection of consumer-oriented tools designed to enhance your internet experience by making it faster, safer, and more dependable. Through our extensive network of global data centers and strategic peering collaborations, we optimize internet routing, significantly speeding up access. With options for filtering and pre-set protections, families can shield themselves from inappropriate content and other risks. This service provides a straightforward method for implementing parental controls and content filtering across all devices in your household. Setting up OpenDNS in your home is quick and uncomplicated, with no advanced technical expertise required. Our user-friendly guides and comprehensive knowledge base ensure that installation is simple and efficient. The system effectively blocks over 7 million harmful domains and IP addresses while maintaining excellent performance levels. Additionally, it identifies more than 60,000 new malicious destinations, including domains, IPs, and URLs, on a daily basis. With an impressive capacity to handle over 620 billion DNS queries each day, our global network stands as a reliable guardian against online threats. This level of security and efficiency makes OpenDNS an essential tool for anyone looking to enhance their internet safety.

Imagine a world where your SPF record updates itself seamlessly. Even better, envision a service that takes on this task for you, allowing you to set it and forget it completely. With AutoSPF, you simply need to add a single include directive in your SPF record that directs to our server, and we handle everything from there. AutoSPF consistently delivers a flattened SPF record in response to public DNS queries, leveraging real-time data sourced from the include statement. It encompasses all the essential functionalities you would expect from an SPF flattening service, automatically flattening every domain within the include. By using AutoSPF, there's no longer a need for you to frequently adjust your DNS records for SPF updates. You can effortlessly add new networks or authenticate additional senders with just a click. Unlike other services that bundle SPF flattening as merely one feature of expensive software suites, AutoSPF is exclusively crafted to address this specific concern. This focused approach means you won’t be burdened with unnecessary costs, saving you hundreds or even thousands of dollars each month. In essence, AutoSPF simplifies SPF management while optimizing your resources effectively.

Quad9 offers a complimentary service that substitutes your standard ISP or enterprise Domain Name Server (DNS) settings. Whenever your device engages in any online activity that relies on DNS—an occurrence that is quite common—Quad9 effectively obstructs access to harmful domain names by utilizing a constantly updated database of threats. This proactive blocking shields your computers, mobile devices, or IoT systems from various dangers such as malware, phishing attempts, spyware, and botnets, while also enhancing performance and ensuring your privacy. The Quad9 DNS service is managed by the Quad9 Foundation, which is based in Switzerland and is dedicated to fostering a safer and more resilient Internet for all users. Furthermore, when utilizing Quad9, your IP address is never recorded in any of their systems, ensuring an additional layer of privacy protection. This commitment to user safety and anonymity makes Quad9 an appealing choice for individuals and organizations alike.

UltraDNS is a robust, cloud-based authoritative DNS service designed for enterprises, providing reliable and swift query responses for websites and essential online resources. This managed DNS solution guarantees complete website uptime and incorporates advanced security features for enhanced protection. As users around the globe demand uninterrupted and secure digital interactions, the complexities of DNS management have escalated significantly. The rise of Internet of Things (IoT) devices, coupled with various online threats, has made it challenging for organizations to devise an effective DNS strategy tailored to their IT requirements. It is increasingly difficult to maintain a knowledgeable in-house team for DNS management, and securing the necessary resources to establish a coherent strategy that aligns with current Internet challenges is often unfeasible. Ensure your website and digital assets remain accessible at all times with UltraDNS, which is supported by a commitment to 100% uptime and top-tier service-level agreements, all on a worldwide platform. This commitment empowers businesses to focus on their core operations while trusting that their online presence is managed by experts in the field.

IBM NS1 Connect offers premium, authoritative DNS & advanced traffic steering to deliver the high-performance, reliable, secure network connectivity that businesses need to meet increasingly sophisticated customer expectations through our: Global anycast network: Providing massive capacity & scale needed to keep users reliably connected across the world. API-first Architecture: Easily integrate & automate all NS1 Connect function. HTTPS Redirects: Manage every element of your HTTPS redirects from one platform. GSLB and RUM-based traffic steering: Balance loads at a global scale & reduce latency with near-real-time device performance data DDoS Attack Protection: Ensuring sufficient capacity to absorb traffic spikes & controls in place to guard against automated “junk” queries. NS1 Connect offers add-on options to suite your business needs including: DNS Insights: Providing the data you need to quickly identify & deal with misconfigurations impacting application performance. Dedicated DNS: Stay up & running with a native secondary DNS resolution infrastructure for seamless continuity of operations. DNS Traffic Steering: Optimize connections to applications, services & content based on geography, RUM data, load and more.

Taking preventive measures is far more effective than dealing with issues after they arise, particularly in the realm of cybersecurity. It’s wise to identify and eliminate malware domains before they can compromise your device, wouldn’t you agree? The DNS Firewall serves as an ideal solution for this challenge! It effectively prevents malware by blocking access to known harmful websites, ensuring that malware cannot infiltrate your system. KeepSolid DNS Firewall safeguards your online activities by actively blocking malicious domains in real-time while you navigate the internet. You can customize the types of websites or content you want to restrict, including categories like gambling, games, fraudulent news, and adult content, or even create a personalized block list. Additionally, KeepSolid DNS Firewall is adept at identifying and thwarting phishing websites that aim to capture your personal information, which are frequently utilized in email scams, providing you with enhanced online security. With its user-friendly and straightforward interface, the app requires no technical expertise to operate. Setting it up is a breeze, taking only a few simple steps to get started. This makes it accessible for anyone looking to bolster their cybersecurity measures.

Safeguard your digital information, privacy, and lifestyle with just a single click. MonoDefense offers a suite of security applications designed to cover every aspect of your online existence. With these four essential tools, you can securely store your login information, shield your browsing habits, protect against dubious DNS threats, and effortlessly access your favorite content. This comprehensive package makes it virtually impossible for anyone to monitor or spy on your activities. Enjoy secure internet surfing, anonymous data sharing, and private communications across social media and forums. Don’t put yourself at risk of becoming a victim of online harassment, targeted bullying, or ideological persecution for your views. Engage in digital conversations and share your opinions openly and without anxiety. We commit to defending your data, personal details, and devices from cyber threats. Utilizing AES-256 encryption, your internet traffic, passwords, and sensitive information will be obscured from prying eyes. Additionally, robust firewall features will help you steer clear of harmful websites while enhancing your online security. With MonoDefense, you can navigate the internet with confidence and peace of mind.

Intra allows you to bypass websites and applications that have been restricted due to Domain Name System (DNS) manipulation, a prevalent method of online censorship. Additionally, Intra offers protection against phishing attempts and malware attacks, which are designed to capture sensitive information such as usernames and passwords or to install malicious software on your devices by redirecting you to fraudulent sites. Using Intra is incredibly straightforward — simply activate it and you can forget about it. Furthermore, Intra does not impede your internet speed and there are no data caps involved. Your privacy is safeguarded with Intra, as it does not monitor the applications you utilize or the websites you browse. You also have the option to customize your DNS server provider, enhancing your control over your internet experience. Intra encrypts your connection to a public DNS server for added security. Essentially, DNS servers function like a contact list for the internet, supplying the precise addresses you need to access websites or open applications. With Intra, you can feel secure and confident while navigating the online world.

GSLB.me offers a cloud-hosted, dependable DNS and Global Server Load Balancing service that encompasses comprehensive authoritative DNS capabilities, geographic traffic distribution based on DNS, failover mechanisms, enhanced availability, geographic routing, dynamic DNS, DNSSEC, and recursive DNS. There’s no need for installation; simply configure your DNS services, and you’re set to go. It’s a seamless and robust solution, providing all the necessary tools in one place. With programmability and orchestration easily accessible, GSLB.me can function both as an interactive tool or as an integrated element within your application or network service. Global Server Load Balancing has never been simpler or more effective, thanks to six balancing algorithms that offer complete control over service delivery. Built upon a swift, dependable, and globally distributed infrastructure, GSLB.me significantly accelerates DNS resolution times, ensuring optimal performance for users worldwide. Furthermore, its user-friendly interface makes it accessible for both beginners and seasoned professionals alike.

A contemporary method for DNS-based content filtering and security allows users to easily manage what content is accessible online. This solution is particularly beneficial for families and also serves as a robust tool for businesses. CleanBrowsing provides a DNS-based filtering service designed to ensure a safe browsing experience by preventing unwanted surprises. It accomplishes this by intercepting domain requests and blocking sites according to your specific filtering preferences. For instance, the complimentary family filter effectively prevents access to pornographic, obscene, and adult material, while still permitting safe access to popular sites like Google, YouTube, Bing, and DuckDuckGo. The service offers three distinct filters that cater to a global audience—namely, Security, Adult, and Family filters. The Family filter not only blocks adult and obscene content but also enforces Safe Search settings on various search engines like Google, Bing, and Yandex. On the other hand, the Security filter is exclusively aimed at limiting exposure to malicious websites, ensuring a safer online experience overall. By utilizing these tools, users can create a tailored internet environment that aligns with their individual needs and values.

F5 Distributed Cloud DNS guarantees optimal performance and reliability for your applications, streamlining DNS services across various cloud platforms and contemporary applications. This solution offers a globally distributed, SaaS-based primary DNS that ensures your applications achieve the highest levels of scalability and responsiveness across the globe. With automatic capacity scaling, you can deploy and manage applications anywhere with ease, as our DNS is designed on a worldwide data plane that adapts to fluctuating demands seamlessly. The rapid deployment process allows for configuration and provisioning within minutes, utilizing a unified set of APIs and a single user interface that simplifies the DNS setup for any application deployment. Additionally, it incorporates multiple layers of security, featuring dynamic protection and automatic failover mechanisms to safeguard against distributed denial-of-service (DDoS) attacks and potential manipulation of domain responses, ensuring the integrity of your applications. This comprehensive approach not only enhances security but also boosts overall operational efficiency.