Best Open-Source Security Software

Open-source password manager with a generous free tier.

Lightweight, privacy-friendly web analytics.

Private, end-to-end encrypted messaging.

Comprehensive authentication framework

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

Distributed operating system for blockchain app builders

Private and secure note-taking app

Secure, Simple and Scalable Video Conferences

Open-source antivirus engine for detecting malware across platforms

Bitwarden‑compatible vault hosted on Cloudflare Workers for free

Patch-level verification for Bundler

Open source password manager for teams

Automate cloud security and compliance

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

Single Sign-On Multi-Factor portal for web apps

Unified XDR and SIEM protection for endpoints and cloud workloads

Free, open-source password manager

The privacy-first browser and search engine that blocks trackers, ads, and cookie pop-ups by default.