Alternatives

Products that do what AuthPlane – OAuth 2.1 and PKCE authorization server for MCP does

1. 1HO
   Hydra – Open-Source OAuth2 Server▲190

   2019 · gethydra.sh

2. 2OO
   oso – Open-Source Policy Engine for Authorization▲44

   2020 · osohq.com

3. 3KA
   Keratin AuthN – Accounts and Auth Microservice in Go▲104

   2017 · keratin.tech

4. 4FO
   Fosite – OAuth2 framework for Go▲38

   2016 · github.com

5. 5BA
   Bare Auth – a ready-to-deploy stateless authentication server▲7

   2015 · github.com

6. 6TA
   Twofu: A Two-Factor Authenticator Command-Line App▲11

   2016 · github.com

7. 7AM
   A microservice that makes adding authentication to your app easy▲89

   2017 · github.com

8. 8TE
   The easiest 2-factor auth▲27

   2014 · developer.mepin.com

9. 9EI
   Emauth.io – Free service for Slack-style passwordless login links▲36

   2020 · emauth.io

10. 10WA
    Wasp Auth UI – The first full-stack auth with self-updating forms▲5

    2023 · wasp-lang.dev

11. 11PU
    PKI User Authentication as a Service▲5

    2022 · zalter.com

12. 12DI
    Drov.io – plug-and-play user authentication and management platform▲15

    2015 · drov.io

13. 13TA
    Tankman – An Open Source User Management and Authorization MicroService▲7

    2023 · github.com

14. 14AA
    Authentic: Authentication for Microservices▲13

    2015 · github.com

15. 15KS
    Keyper – SSH Key Based Authentication Manager is now open source▲7

    2020 · keyper.dbsentry.com

16. 16MS
    MCP Server for secure code execution (Python, Ruby, C, and more)▲7

    2025 · github.com

17. 17KA
    Kubernetes: A single OAuth2 proxy for multiple ingresses▲5

    2020 · callumpember.com

18. 18OS
    Open Source Auth w/ Passkeys▲5

    2024 · github.com

19. 19PA
    Phido2 – A PHP Library for Authentication by Windows Hello▲13

    2016 · github.com

20. 20OS
    Open Source Edge Proxy for Low Latency Distributed Authorization▲7

    2022 · github.com

21. 21AW
    A web app authorization crawler and scanner using Puppeteer▲5

    2019 · github.com

22. 22NA
    NullAuth – A proposal for password-less authentication▲13

    2017 · nullauth.org

23. 23AM
    A minimal web-based IMAP client for use on untrusted machines▲18

    2016 · github.com

24. 24SA
    SimonSays, a Rails gem for declarative, role-based authorization▲7

    2014 · simonsays.onsimplybuilt.com

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