Best Linux Open-Source Security Software

Open-source password manager with a generous free tier.

Private, end-to-end encrypted messaging.

Secure dotenv for developers

Cross-platform password manager compatible with Keepass 2.x

Simple vaultless password manager in Go

An open platform for various uses

Secure and fast microVMs for serverless computing

Private and secure note-taking app

Open-source antivirus engine for detecting malware across platforms

Patch-level verification for Bundler

Advanced offline password cracker supporting hundreds of hash types

Interactive, scriptable man‑in‑the‑middle proxy for HTTP, HTTPS and WebSocket traffic

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

Unified XDR and SIEM protection for endpoints and cloud workloads

Run data science on remote data without moving it.

Fast and lightweight DNS proxy as ad-blocker for local network

Automate OSINT for threat intelligence and attack surface mapping

Secure, fast file transfers from the command line

A note-taking app with a focus on security and simplicity

Fast and secure backup and versioning for files and directories

Network-wide ads & trackers blocking DNS server

Secure access to all infrastructure

Easy, secure WireGuard networking with 2FA

Fast, secure, efficient backup program