Best Android Open-Source Security Software

Open-source password manager with a generous free tier.

Private, end-to-end encrypted messaging.

Cross-platform password manager compatible with Keepass 2.x

Private and secure note-taking app

Secure, Simple and Scalable Video Conferences

Secure password manager with zero‑knowledge encryption for individuals and teams

The privacy-first browser and search engine that blocks trackers, ads, and cookie pop-ups by default.

Free open-source Android app for secure 2-step verification tokens.

Easy, secure WireGuard networking with 2FA

Secure password management on Android

Open-source, ad‑free ClashMeta proxy client for all major platforms

Open‑source V2Ray client for Android, giving power users full proxy control

Stateless password manager

Secure password management for Android

Secure CommsOS for mission-critical operations