RethinkDNS is described as 'An OpenSnitch-inspired firewall and network monitor + a pi-hole-inspired DNS over HTTPS client with blocklists' and is a popular Ad Blocker in the web browsers category. There are more than 25 alternatives to RethinkDNS for a variety of platforms, including Android, iPhone, Linux, iPad and Windows apps. The best RethinkDNS alternative is Portmaster, which is both free and Open Source. Other great apps like RethinkDNS are AdGuard, NextDNS, Pi-hole and Athena - Firewall & Adblocker.
RethinkDNS alternatives are mainly Ad Blockers, but if you're looking for
Firewalls or Privacy Tools you can filter on that. You can also filter by region, for example
EU-based alternatives if you prefer software developed in the European Union. These are just examples - use the filter bar below to find more specific alternatives to RethinkDNS.
Very powerful and clean firewall.