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

Secure, Simple and Scalable Video Conferences

Bitwarden‑compatible vault hosted on Cloudflare Workers for free

Patch-level verification for Bundler

Automate cloud security and compliance

General purpose TLS and crypto library

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

Run data science on remote data without moving it.

Automate OSINT for threat intelligence and attack surface mapping

The web app for all your data manipulation and decoding needs

The authentication glue you need

Secrets detection for GitHub, GitLab and Bitbucket repositories