Best Windows Free Security Software

Private, end-to-end encrypted messaging.

The world’s most popular messaging app.

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

Open-source antivirus engine for detecting malware across platforms

Patch-level verification for Bundler

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

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

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

Fast, secure messaging on your computer

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

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.

A Chromium‑based browser packed with productivity‑boosting features

Generates a detailed profile of your installed software and hardware.

Unified XDR and SIEM protection for endpoints and cloud workloads