The best Ad Blocker alternative to Portmaster is NextDNS, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to Portmaster and 12 are Ad Blockers so hopefully you can find a suitable replacement. Other interesting Ad Blocker alternatives to Portmaster are AdGuard, Pi-hole, RethinkDNS and OpenSnitch.
NextDNS protects you from all kinds of security threats, blocks ads and trackers on websites and in apps and provides a safe and supervised Internet for kids — on all devices and on all networks.
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.
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.
Their is a comparison blog on safing.io suggesting when to use what solution https://safing.io/blog/2021/12/09/portmaster-vs-pi-hole/
An OpenSnitch-inspired firewall and network monitor + a pi-hole-inspired DNS over HTTPS client with blocklists.
OpenSnitch is much more superior to any other software, especially astro-turfed Portmaster. Portmaster doesn't detect even a fraction of what is actually happening on your system, whereas OpenSnitch catches it all. It's an application firewall everyone should have! You'll be amazed how many stuff pretending-to-be-FOSS software is phoning home on you.
InviZible Pro uses DNSCrypt Protocol, Tor and i2pd (I2P Daemon) (PurpleI2P) to achieve maximum security, privacy and comfortable use of the Internet.
Even though the firewall for this is less sophisticated, I still think it's a good alternative because of the dnscrypt protocol and anonymizing proxies. They're both "swiss-army knives" when it comes to privacy, but it's implemented in slightly different ways.
Comodo Firewall is a personal firewall, a genre of security software that secures PCs by policing Internet traffic on an app by app basis. The most prominent feature of a personal firewall is generating popup notifications when an unknown program attempts to access the Internet...
The upribox Software turns your RaspberryPi into a privacy-enhancing Wireless router with adblocking, Tor, and a VPN server.
Firewalla is a vital security addition to every home and small business with network and IoT devices.
Free adblocker, anonymity, traffic and battery saver, firewall, and Internet speed increase.
AdProtect is free adblock tool that blocks ads in apps, games, browsers and has a built-in firewall for Internet access control in your apps.
ROOT not required!
Block unwanted ads for faster browsing with Total Adblock. Remove banners, pop-ups, and video ads. SAVETIME by decreasing data usage and improving privacy while prolonging battery life. Easy iOS setup requires a paid account, offering custom filters and an Allow list for trusted sites.
United States
Cyprus
EU
Italy
Ukraine
United Kingdom
AdGuard is great, but it's not a firewall/port system.