The best Firewall alternative to NextDNS is Pi-hole, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to NextDNS and 15 are Firewalls so hopefully you can find a suitable replacement. Other interesting Firewall alternatives to NextDNS are AdGuard, Portmaster, RethinkDNS and AdGuard Home.
Blocks ads for all connected devices at the DNS layer without client setup. Provides web control, in-app ad and tracker blocking, DHCP and API support, regex filtering, privacy modes, audit logs, and long-term query analytics for network management.
The same in both purpose and method
Ad-blocking solution eliminating intrusive ads and preventing tracking, with malware protection. Filters pop-ups, banners, and more for clean browsing. Works in the background for ad-free surfing, protects data privacy with Spyware filter, and controls ad display in apps.
AdGuard is a good alternative but NextDNS seems more trustworthy.
AdGuard is an Adblock browser extension not a DNS service.
Free, open-source privacy suite monitoring all network activity, blocking unwanted connections, using trusted filter lists for ads and malware, enforcing DNS-over-TLS, providing custom app and global rules, and supporting advanced privacy management.
An OpenSnitch-inspired firewall and network monitor + a pi-hole-inspired DNS over HTTPS client with blocklists.
Like NextDNS, RethinkDNS is a DNS resolver that aim to provide a safer and more private browsing experience by offering ad-blocking and tracking protection. On the plus side it is open source and the free tier with unlimited queries. The free tier of NextDNS is limited to (I think) 300,000 queries. If you want a free and open source alternative this is it. At the time of writing, their website does state that paid plans are on their way.
RethinkDNS allows you to check if a domain is blocked or not in the lists you choose, but it doesn't allow for personalized allowlists or blocklists, nor does it have a comprehensive log (besides using the app).
AdGuard Home is a network-wide software for blocking ads & tracking. After you set it up, it'll cover ALL your home devices, and you don't need any client-side software for that.
InviZible Pro uses DNSCrypt Protocol, Tor and i2pd (I2P Daemon) (PurpleI2P) to achieve maximum security, privacy and comfortable use of the Internet.
Zen is an open-source system-wide ad-blocker and privacy guard for Windows, MacOS, and Linux. It works by setting up a proxy that intercepts HTTP requests from all applications, and blocks those serving ads, tracking scripts that monitor your behavior, malware, and other...
DNS66 blocks advertisements on Android by intercepting DNS requests using Android's VPN layer and blocking requests for blacklisted hosts.
A fundamental re-design of user Data Privacy. Your multi-tool for online protection. So easy your grandma could use it. Costs less than a cup of coffee per year.
CacheGuard Gateway is a free, open-source network security appliance for startups, growing businesses, and SMEs/SMBs that need enterprise-grade protection without the complexity or cost.
Firewalla is a vital security addition to every home and small business with network and IoT devices.
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Basically a Self Hosted NextDNS. Its meant for more advanced users.