Best Free Security Software

Private, end-to-end encrypted messaging.

The world’s most popular messaging app.

Comprehensive authentication framework

Secure dotenv for developers

A privacy-focused web browser that blocks trackers and secures your data by default.

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, two‑factor Bitcoin wallet for mobile and web

Distributed operating system for blockchain app builders

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

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

Open source password manager for teams

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.

Free open-source disk encryption with strong security, successor to TrueCrypt.

A lightweight KDE web browser built for privacy, security and deep customization

Advanced offline password cracker supporting hundreds of hash types