Privacy Policy

Last updated: March 17, 2026

Overview

AuthRelay is an open-source tool that lets you use your phone's Google account to sign in on desktop browsers. This privacy policy covers this website and the relay server. For app-specific privacy policies, see: Mobile App · Chrome Extension.

We are committed to protecting your privacy. AuthRelay is designed with a zero-knowledge architecture — we never see, store, or have access to your credentials.

Relay Server

  • The relay server facilitates communication between your phone and desktop browser via WebSocket connections.
  • All data passing through the relay is encrypted end-to-end. The server cannot decrypt any payloads.
  • Sessions are ephemeral and expire automatically. No session data is persisted to disk or database.
  • The relay server does not log message contents, IP addresses, or any identifying information.

Third-Party Services

  • Firebase Analytics — Used in the mobile app, Chrome extension, and this website to collect anonymous usage data. See Firebase Privacy.
  • Firebase Crashlytics — Used in the mobile app to collect anonymous crash reports. See Firebase Privacy.

Data Collected by Firebase

Firebase Analytics may automatically collect the following anonymous data:

  • Device type, operating system, and browser version
  • Approximate location (country/region level, derived from IP address)
  • App or page usage events (e.g. screens viewed, buttons tapped)
  • Crash logs and stack traces (Crashlytics, mobile app only)

Firebase does not collect your name, email, Google credentials, OAuth tokens, or any content you transmit through AuthRelay. For full details, see Google's Firebase data collection documentation.

Open Source

AuthRelay is fully open source. You can audit the complete source code, including the extension, mobile app, relay server, and this website, on GitHub.

Changes to This Policy

We may update this privacy policy from time to time. Changes will be posted on this page with an updated date.

Contact

If you have questions about this privacy policy or want to request data removal, please open an issue on our GitHub repository.