Best Free Security Software

Private, end-to-end encrypted messaging.

The world’s most popular messaging app.

Simple vaultless password manager in Go

An open platform for various uses

Secure and fast microVMs for serverless computing

Secure, two‑factor Bitcoin wallet for mobile and web

A portable OS that preserves your privacy and anonymity

Secure, Simple and Scalable Video Conferences

Bitwarden‑compatible vault hosted on Cloudflare Workers for free

Patch-level verification for Bundler

A decentralized, end-to-end encrypted messenger that needs no phone number or email to use.

Automate cloud security and compliance

Free, complete implementation of the OpenPGP standard for encrypting and signing data.

Twilio's two-factor authentication app with secure cloud backup and multi-device sync.

Companion app that generates 2FA codes stored securely on a physical YubiKey.

A secure password manager for teams

Peer-to-peer file transfer with no size limits and nothing stored on servers

A fast, secure, and feature-rich web browser with built-in AI tools.

A fast, private, and secure web browser that blocks trackers by default.

A privacy-focused web browser built on the source code of Firefox.

A highly customizable and feature-rich web browser built for power users.

Single Sign-On Multi-Factor portal for web apps

Generates a detailed profile of your installed software and hardware.

The latest Kali Linux release with updated tools for penetration testing and security research.