

Cisco Umbrella is described as '(formerly OpenDNS) provides the first line of defense against threats on the internet wherever users go' and is a very popular DNS Resolver in the network & admin category. There are more than 50 alternatives to Cisco Umbrella, not only websites but also apps for a variety of platforms, including Windows, Linux, Mac and Android apps. The best Cisco Umbrella alternative is NextDNS, which is both free and Open Source. Other great sites and apps similar to Cisco Umbrella are 1.1.1.1, Cloudflare, MullvadDNS and AdGuard DNS.


Runs as a Windows service, supports any TCP/IP device. Display a blocked page as result of any domain name matched in the keywords list. Prevent installation of file sharing/P2P clients, spyware, or other malicious software - a technique referred to as DNS sinkhole or blackhole.

DNSReactor provides FREE Public DNS servers that you can use as an alternative to your local isp DNS servers. Take advantage of this FREE added layer of security NOW.
DNSReactor incl. VPNReactor.com and DNSReactor.net is no longer available.You get some advertising.

Point is a fully managed DNS solution trusted by thousands of users and responsible for more than 220 000 domains worldwide.
Authoritative, dynamic and geo-DNS, traffic balancing, CDN offload, domain services and DNS firewall. With full DNSSEC support.


SmartViper is a web mining company dedicated to analyze web pages. They let anyone use their DNS servers for free. They log personal information with their website but it’s not clear what they log with their DNS service. They don’t share that information with third parties.
CaptainDNS centralizes DNS management, diagnostics, and monitoring for developers and IT teams managing domain infrastructure.

VNIS is a comprehensive security solution for Websites, Applications, and APIs, built on AI and Machine Learning to counter increasingly sophisticated cyberattacks such as zero-day exploits, DDoS, SQL Injection, and OWASP Top 10 vulnerabilities.

HaGeZi DNS offers free, non-commercial public DNS resolvers designed and operated by a private individual for the European community. It provides robust DNS-based blocking of ads, trackers, scam, phishing, fake, and malware domains - helping users achieve greater privacy and...
This is not a DNS filter. This is just another DNS server. As far as I can tell it does not provide any additional security whatsoever.