Best Free Open-Source Security Software

Private, end-to-end encrypted messaging.

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

A secure password manager for 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

Secrets detection for GitHub, GitLab and Bitbucket repositories

Fast and secure backup and versioning for files and directories

Network-wide ads & trackers blocking DNS server

Free open-source Android app for secure 2-step verification tokens.

Secure password management on Android

Fast, secure, efficient backup program

High-performance reverse proxy for NAT traversal

Generate Software Bill of Materials from container images and filesystems

Free backup software to store encrypted backups online

Secure password vault built for teams, with instant sharing and audit trails.