Best Open Source Security & Privacy Tools in 2026

Tools for protecting privacy, securing networks, and managing vulnerabilities and security threats.

3 open source security & privacy tools — ranked by GitHub stars. Browse all

Lightweight, self-hosted Bitwarden-compatible server written in Rust — runs on minimal hardware with full client support.

Network-wide DNS-based ad blocking that protects all devices on your network, including Smart TVs and IoT devices.

Network-wide DNS-based ad and tracker blocker with parental controls, DNS rewrites, and detailed query logging.