How do you verify a Proton VPN build? Download from trusted channels, compare checksums or signatures, and delete mismatches.

Open source ≠ every APK is clean. Primer: open source. Start at download. Check Windows publishers, macOS notarization, Android hashes, Linux repo keys (CLI, keyring note). Failed verification: do not install; rotate credentials if you already did. Signup limits: email limits. Install: guide; audit.

Related: open source