Alternatives

Products that do what OTPSync does

Chrome authenticator with instant OTP autofill

1. 1
   TypingDNA Authenticator▲315

   2FA codes in your browser, secured by the way you type

   2018

2. 2
   Faktor▲169

   The missing 2FA code autocomplete for Chrome

   2024

3. 3
   Minimalist▲256

   Password manager for iPhone, iPad, Mac, with iCloud Sync

   2021

4. 4
   Ente Auth▲357

   Free, Secure, Open Source 2FA

   2024

5. 5
   2FA to Tray▲91

   The missing 2FA manager for macOS.

   2020

6. 6
   Mtalkz ▲2

   Fast OTP Delivery Across SMS, WhatsApp & Voice

   Jun 2026 · mtalkz.com

7. 7SA
   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

8. 8FT
   Faktor – The missing 2FA code autocomplete for Chrome▲26

   Hi everyone, Kenneth here. As a loyal Chrome user, I was frustrated that one of Apple's most loved features from Safari and iOS wasn't available in Chrome. So, I built Faktor—a tool that grabs 2FA security codes from your iPhone and autofills them in Google Chrome on your Mac. Faktor is a native macOS app with a small Chrome extension, and once you install Faktor its easy to forget that this functionality isn't native to Chrome. Enjoy!

   2024 · getfaktor.com

9. 9AO
   Auto-OTP: automatically send and receive OTPs, end-to-end encrypted▲20

   2022 · auto-otp.com

10. 10
    Authy▲177

    Dead simple two-factor authentication optimized for devs

    2014

11. 11
    Simple OTP 2.0▲131

    Passwordless, source-code-included auth for your website

    2024

12. 12T2
    Twothy: 2FA Authenticator for CLI. Compatible with Google Authenticator▲6

    2018 · github.com

13. 13
    AuthPass▲75

    Simple, open source, cross platform password manager 😅️

    2020

14. 14AN
    A non-OTP 2-factor authentication Chrome app▲8

    2015 · logintc.com

15. 15IB
    I built an HTTP client that perfectly mimics Chrome 142▲39

    BoringSSL and nghttp2. Matches JA3N, JA4, and JA4_R fingerprints. Supports HTTP/2, async/await, and works with Cloudflare-protected sites. Not trying to compete with curl_cffi - just a learning project that turned into something functional.

    Nov 2025 · github.com

16. 16
    Email OTP / 2FA by Dexatel Verify▲22

    Verify users safely with Email OTP fallback

    Oct 2025

17. 17T2
    The 2FA app that notifies you when you get `012345`▲35

    2024 · jacobbartlett.substack.com

18. 18
    Authentica▲9

    APIs to verify users via Nafath, OTP, and Biometrics.

    Oct 2025

19. 19
    Authyo for Magento▲9

    Seamless OTP Verification for Secure Magento

    Nov 2025

20. 20OS
    Ots – share a secret via one-time URL▲77

    2021 · github.com

21. 21AO
    Authian – Open Source 2-Factor Authentication Using Instant Messengers▲37

    2017 · authian.org

22. 22
    Authenticator app▲7

    Authenticator app — 2FA codes right in your browser.

    Sep 2025

23. 23
    OTPilot▲5

    Auto-fill 2FA codes on any login page

    May 2026 · chromewebstore.google.com

24. 24EA
    Ente Authenticator – Open-source 2FA app with E2EE backups▲10

    2023 · github.com

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