Best Free Security Software

General purpose TLS and crypto library

Open-source antivirus engine for detecting malware across platforms

High-performance reverse proxy for NAT traversal

Secure and fast microVMs for serverless computing

An open platform for various uses

Secrets detection for GitHub, GitLab and Bitbucket repositories

The world’s foremost network protocol analyzer for deep packet inspection

Secure, automated dependency management for Node.js projects

Secure, self‑hosted development environments for teams

Secure dotenv for developers

Interactive application firewall for GNU/Linux

A modern, secure password manager

Password management for macOS

Comprehensive authentication framework

A fast, secure, minimalist note‑taking app for students and freelancers

Secure, private budgeting for individuals and households

Fast, simple, and secure web browsing

Simple vaultless password manager in Go

Stateless password manager