Alternatives

Products that do what Clerk – all of user management as-a-service, not just authentication does

1. 1
   Clerk▲238

   More than authentication, complete user management

   2022

2. 2
   Stack Auth (YC S24)▲424

   Open-source Auth0/Clerk alternative

   2024

3. 3SA
   Stack, an open-source Clerk/Firebase Auth alternative▲144

   Hey HN! Happy to finally launch Stack. We made it because we like to put apps into production quickly, and authentication & user management was taking up way too much time. We have components like and that automatically adapt to whatever theme & design system you're using. Check the blog post to see the example with Radix UI and Joy UI. Also, there's an admin dashboard for monitoring and editing accounts. Stack is 100% AGPL/MIT-licensed, so you can self-host it. Cheers!

   2024 · stack-auth.com

4. 4
   Userbase▲465

   Add user accounts & data persistence to your static site.

   2020

5. 5
   Clerk▲280

   Authentication and user management for React and Next.js

   2021

6. 6LO
   Logto, OSS to build sign-in experience and user identity within minutes▲57

   2022 · logto.io

7. 7
   Theneo▲246

   The API management platform for humans and agents

   May 2026 · theneo.io

8. 8
   OskarOS▲269

   Make anything bookable in minutes

   2023

9. 9
   Notion Freelancer OS▲347

   Manage and grow your freelance business in Notion

   2022

10. 10
    Assembly 2.0▲250

    Build modern client portals for service businesses

    Mar 2026

11. 11
    Student OS▲310

    Your buddy in everyday student life

    2023

12. 12
    Faces▲459

    Create a people directory for your community 👫

    2017

13. 13
    Authorizer▲296

    Open source authentication and authorization solution

    2021

14. 14
    Book Like A Boss▲247

    Simple platform to sell your services & book appointments

    2017

15. 15
    Hire OS▲132

    The ultimate hiring workflow solution for efficient hiring

    2023

16. 16
    Startup OS▲136

    The all-in-one solution for managing businesses with Notion

    2023

17. 17
    Assembly▲160

    Empower your team with employee recognition

    2020

18. 18
    Kinde▲211

    Infrastructure for authentication, feature flags & billing

    2022

19. 19LB
    Logto beta – build universal sign-in, auth, and identity with ease▲59

    2022 · github.com

20. 20
    Logto Cloud▲121

    Develop, manage and secure your product’s user identities

    2023

21. 21
    adminMongo▲117

    An open source admin user interface for your MongoDB

    2017

22. 22
    Onboardbase▲162

    Secrets for your entire team

    2021

23. 23DU
    DailyCred: User Accounts as a Service▲101

    2012 · dailycred.com

24. 24HA
    Hellō, a cooperative approach for online identity▲97

    We are looking for feedback on a novel way to build and run a service for you to manage and share your identity. Demo: https://greenfielddemo.com

    2022 · hello.coop

Ranked by how close each launch is in meaning, then by votes. Refine with a description →