Portmaster is a free and open-source privacy suite that puts you back in charge of your computer.

An OpenSnitch-inspired firewall and network monitor + a pi-hole-inspired DNS over HTTPS client with blocklists.

Visualize network activity in detail, get notified when new apps access the network, look out for malware, and block badly behaving apps.

A firewall protects your computer against unwanted guests from the Internet. But who protects your private data from being sent out? Little Snitch does!

Simple firewall for MS Windows.

NetGuard provides simple and advanced ways to block access to the internet - no root required.

OpenSnitch is a GNU/Linux application firewall.

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.

Lockdown Privacy is an Open Source and free firewall for your iOS device. We built the product to help protect users from app developers and analytics companies that are monetizing user data without consent or transparency.

ZenMate Web Firewall is a security solution that blocks malware, trackers and security threats, plus free Ad Blocker against Malvertising!.

Firewalla is a vital security addition to every home and small business with network and IoT devices.