Alternatives

Products that do what Authian – Open Source 2-Factor Authentication Using Instant Messengers does

1. 1
   Authy▲177

   Dead simple two-factor authentication optimized for devs

   2014

2. 2SS
   SharedOTP – Shared two-factor authentication mechanism▲29

   2021 · sharedotp.com

3. 3TA
   Twofu: A Two-Factor Authenticator Command-Line App▲11

   2016 · github.com

4. 4TE
   The easiest 2-factor auth▲27

   2014 · developer.mepin.com

5. 5NA
   Nod – Anonymous proximity messenger▲53

   2015 · yougotthenod.com

6. 62A
   2FA, a one-file 2-factor authentication app written in Python▲8

   2020 · gist.github.com

7. 7SA
   SpicyPass – A free and open-source minimalist password manager▲241

   2020 · github.com

8. 8AN
   A non-OTP 2-factor authentication Chrome app▲8

   2015 · logintc.com

9. 9ST
   SoundLogin – two-factor authentication via sound notifications▲16

   2015 · soundlogin.com

10. 10CI
    ChatSecure iOS v4.0 – OMEMO and Signal Protocol▲107

    2017 · chatsecure.org

11. 11DP
    Decentralized P2P Messaging with Blockchain Verified Identities▲95

    2018 · stealthy.im

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

    2017 · github.com

13. 13TF
    Two-Factor Auth with Emojis▲6

    2021 · authmoji.com

14. 14AA
    AiDee – a open source micro-framework for Touch ID and Face ID▲43

    2020 · github.com

15. 15AB
    Authenticator by 2Stable▲28

    2021 · authenticator.2stable.com

16. 16PL
    Password-less authentication via Ramanujan's 1/π series and Nvidia-B200▲5

    May 2026 · zenodo.org

17. 17NA
    NullAuth – A proposal for password-less authentication▲13

    2017 · nullauth.org

18. 18ED
    Ensichat – Decentralized instant messenger for Android▲27

    2015 · github.com

19. 19OS
    Open-Source Anonymous Encrypted TLS+OTR Messaging Written in Go▲25

    2015 · hacktunnel.com

20. 20AA
    Authentic: Authentication for Microservices▲13

    2015 · github.com

21. 21PO
    Passbolt – open-source password manager for teams▲62

    2016 · passbolt.com

22. 22EM
    Easy magic-link authentication – Cierge▲11

    2018 · github.com

23. 23OD
    Opensource Desktop Implementation of the Threema Crypto Messenger▲39

    2016 · github.com

24. 24MS
    masterkey – secure interactive password manager using Go and NACL▲47

    2016 · github.com

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