Best Free Security Software

A note-taking app with a focus on security and simplicity

A privacy-focused, freedom-loving fork of the Mozilla Firefox browser.

Single Sign-On Multi-Factor portal for web apps

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

Defend yourself against tracking, surveillance, and censorship online.

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

Open source password manager for teams

Free, open-source password manager

Password management for macOS

Secure password management for Android

Secure password management on Android

Stateless password manager

Fast, simple, and secure web browsing

Fast, secure, efficient backup program

Fast and secure backup and versioning for files and directories

Network-wide ad blocking DNS server for homes and small businesses

Secure, private budgeting for individuals and households

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

Comprehensive authentication framework

Secure dotenv for developers

Cross-platform password manager compatible with Keepass 2.x

Lightweight Intranet Penetration Proxy Server

General purpose TLS and crypto library

High-performance reverse proxy for NAT traversal