Best Linux Open-Source Security Software

Open-source, ad‑free ClashMeta proxy client for all major platforms

Free backup software to store encrypted backups online

Advanced offline password cracker supporting hundreds of hash types

A secure password manager for teams

A modern, secure password manager

Interactive application firewall for GNU/Linux

Patch-level verification for Bundler

Automate OSINT for threat intelligence and attack surface mapping

Simple vaultless password manager in Go

Deduplicating backup solution

Secure password manager with zero‑knowledge encryption for individuals and teams

Secure CommsOS for mission-critical operations

Private and secure note-taking app