Life & fun · alternatives · 2026

Simply Auth is an authentication tool for Rails developers that enables quick user management setup. It allows developers to add user authentication to their Rails applications in approximately five minutes. The… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Simply Auth – Add users to your Rails app in 5 minutes launched in 2018; newer entries below may have overtaken it.

1. 1
   SimpleID▲150

   Add decentralized auth and storage to your app in 10 minutes

   2019 · simpleid.xyz · its alternatives →

2. 2
   DAuth▲142

   Authentication for the decentralized web in 60 seconds

   2018 · dauth.co · its alternatives →

3. 3AI
   Action.io - 0 to Rails in 60 seconds in your browser▲210

   2012 · action.io · its alternatives →

4. 4
   Cotter 2.0▲165

   A simple & lightweight passwordless auth for your site/app

   2020 · its alternatives →

5. 5
   Copper▲818

   Password-free signups. No social network required.

   2016 · its alternatives →

6. 6
   SuperTokens Passwordless▲173

   Fully flexible, open source auth in 15 minutes

   2022 · supertokens.com · its alternatives →

7. 7
   Instant 2FA▲139

   Add two-factor auth to any site in minutes

   2016 · instant2fa.com · its alternatives →

8. 8
   Firstline▲125

   Authentication made simple

   2023 · firstline.sh · its alternatives →

9. 9
   Fast▲472

   World's fastest login and checkout

   2019 · its alternatives →

10. 10
    Pre-built Auth UI for React▲349

    Install Auth UI and start authenticating users with Supabase

    2022 · supabase.com · its alternatives →

11. 11
    DashboardAuth▲85

    User management for Retool, Streamlit & more

    2022 · its alternatives →

12. 12
    MojoAuth 2.0▲263

    Easiest way to add passwordless login to your apps & website

    2022 · mojoauth.com · its alternatives →

13. 13
    Rails UI▲208

    AI writes your Rails code. Rails UI makes it look like a real product. Complete, coherent product flows for Rails SaaS: auth, dashboards, billing, and email, designed as one system.

    Jan 2026 · railsui.com · its alternatives →

14. 14
    Octauthent▲129

    Add a login form to any website, without a line of code

    2021 · octauthent.com · its alternatives →

15. 15
    DID▲180

    The simplest way to add passwordless auth to websites & apps

    2020 · its alternatives →

16. 16
    Simple OTP▲104

    Simple passwordless authentication for your website

    2023 · its alternatives →

17. 17
    One Account▲176

    1 click sign-ups

    2021 · oneaccount.app · its alternatives →

18. 18
    MojoAuth▲263

    Simple & Easy passwordless authentication for website & apps

    2021 · mojoauth.com · its alternatives →

19. 19
    Easyoauth▲73

    Securely connect your front-end web app to APIs, in minutes

    2021 · its alternatives →

20. 20
    Passage by 1Password▲236

    Frictionless security: auth & user management with passkeys

    2023 · 1password.com · its alternatives →

21. 21
    Feather Auth▲184

    Build an entire sign-in flow in 5 minutes or less.

    2020 · feather.id · its alternatives →

22. 22
    Userbase – Add user accounts and persistence to your static site▲206

    Userbase is the easiest way to add user accounts and data persistence to your static site. No backend necessary.

    2020 · userbase.com · its alternatives →

23. 23
    Easily add a NSA backdoor to your Rails app▲188

    Easily add an NSA backdoor into your Rails app. Contribute to goshacmd/nsa_panel development by creating an account on GitHub.

    2013 · github.com · its alternatives →

24. 24
    Magic Link Auth (by WorkOS)▲164

    Fastest way to add passwordless login to your app for free

    2020 · workos.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →