Alternatives

Products that do what Authy does

Dead simple two-factor authentication optimized for devs

1. 1AO
   Authian – Open Source 2-Factor Authentication Using Instant Messengers▲37

   2017 · authian.org

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

   2014 · developer.mepin.com

3. 3
   Authentiq▲157

   Strong authentication, without the passwords

   2017

4. 4AT
   Acme-tiny, a tiny 200-line Let's Encrypt client▲280

   2015 · github.com

5. 5SA
   SpicyPass – A free and open-source minimalist password manager▲241

   2020 · github.com

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

   2016 · github.com

7. 7
   Master Password▲147

   A stateless password management solution app

   2015

8. 82A
   2FA, a one-file 2-factor authentication app written in Python▲8

   2020 · gist.github.com

9. 9SS
   SharedOTP – Shared two-factor authentication mechanism▲29

   2021 · sharedotp.com

10. 10
    Passible (iOS)▲122

    Password management made simple

    2014

11. 11KA
    Keratin AuthN – Accounts and Auth Microservice in Go▲104

    2017 · keratin.tech

12. 12AM
    A microservice that makes adding authentication to your app easy▲89

    2017 · github.com

13. 13
    Bulwark▲117

    Beautifully simple 2FA

    2021

14. 14BA
    Bare Auth – a ready-to-deploy stateless authentication server▲7

    2015 · github.com

15. 15
    YoAuth▲92

    Two-step authentication using Yo

    2014

16. 16S2
    Secrets 2 – Simple, secure password manager for Mac and iOS▲54

    2016 · outercorner.com

17. 17T2
    Twothy: 2FA Authenticator for CLI. Compatible with Google Authenticator▲6

    2018 · github.com

18. 18NA
    NoKey, a Distributed Password Manager Without a Master Password▲37

    2018 · github.com

19. 19AB
    Authenticator by 2Stable▲28

    2021 · authenticator.2stable.com

20. 20TF
    Two-Factor Auth with Emojis▲6

    2021 · authmoji.com

21. 21MS
    masterkey – secure interactive password manager using Go and NACL▲47

    2016 · github.com

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

    2017 · nullauth.org

23. 23SS
    SpringZKAuth – Spring project utilizing zero-knowledge password proof▲7

    2018 · github.com

24. 24PL
    Password-less authentication via Ramanujan's 1/π series and Nvidia-B200▲5

    May 2026 · zenodo.org

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