Best Windows Free Security Software

Private, end-to-end encrypted messaging.

The world’s most popular messaging app.

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

Free backup software to store encrypted backups online

A simple, fast, and secure note-taking app

A secure password manager for teams

Fast, secure, efficient backup program

Fast and secure backup and versioning for files and directories

Secure, fast file transfers from the command line

Lightweight Intranet Penetration Proxy Server

Interactive, scriptable man‑in‑the‑middle proxy for HTTP, HTTPS and WebSocket traffic

Cross-platform password manager compatible with Keepass 2.x

General purpose TLS and crypto library

Open-source antivirus engine for detecting malware across platforms

High-performance reverse proxy for NAT traversal

An open platform for various uses

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

Secure dotenv for developers

A modern, secure password manager

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