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   * [crypteron.com](https://www.crypteron.com/) — Cloud-first, developer-friendly security platform prevents data breaches in .NET and Java applications
   * [Dependabot](https://dependabot.com/) Automated dependency updates for Ruby, JavaScript, Python, PHP, Elixir, Rust, Java (Maven and Gradle), .NET, Go, Elm, Docker, Terraform, Git Submodules and GitHub Actions.
   * [duo.com](https://duo.com/) — Two-factor authentication (2FA) for website or app. Free for 10 users, all authentication methods, unlimited, integrations, hardware tokens
+  * [Firebase Auth](https://firebase.google.com/products/auth/) — Free end-to-end identity solution, email and password accounts, Google, Twitter, Facebook, GitHub login, phone auth (up to 10k/month), and more.
   * [foxpass.com](https://www.foxpass.com/) — Hosted LDAP and RADIUS. Easy per-user logins to servers, VPNs and wireless networks. Free for 10 users
   * [globalsign.com](https://www.globalsign.com/en/ssl/ssl-open-source/) — Free SSL certificates for Open Source
   * [Have I been pwned?](https://haveibeenpwned.com) — REST API for fetching the information on the breaches.