Alternatives

Products that do what Replace CAPTCHA with Proof-of-Work does

1. 1TT
   Tricking the user to access history using CSS and captchas▲140

   2014 · frantzmiccoli.github.io

2. 2
   Are You a Human?▲67

   Ending the CAPTCHA agony in a unique way.

   2013

3. 3TC
   The Captcha Experiment▲15

   2011 · thecaptchaexperiment.com

4. 4FA
   FriendlyCaptcha – a privacy friendly proof-of-work based CAPTCHA▲9

   2020 · friendlycaptcha.com

5. 5BA
   Breaking a flawed audio CAPTCHA in JavaScript▲27

   2014 · github.com

6. 6
   No CAPTCHA reCAPTCHA▲181

   Google's update to CAPTCHA just asks if you're robot

   2014

7. 7BB
   Browser based deep fakes in pure JavaScript▲117

   2021 · filter.mot.omg.lol

8. 8AC
   AI Captcha Solver for Chrome▲8

   2023 · github.com

9. 91B
   128-bit, roughly-ordered, URL-safe UUIDs▲205

   2021 · github.com

10. 10CT
    Captcha to detect bots with a simple question▲5

    Apr 2026 · joshryandavis.github.io

11. 11
    Add a License Please▲87

    The open source vigilante bot that is cleaning up Github.

    2015

12. 12BC
    BoundIt CAPTCHA: highlight objects in photos to prove you're human▲24

    2013 · boundit.co

13. 13CH
    CodeCaptcha - Hide web links behind coding challenges▲163

    Hello HN, I made this silly project over the long weekend. It’s pretty basic right now and the captchas are very easy. I plan to add captcha difficulty levels for link creators soon.

    2022 · codecaptcha.io

14. 14
    PostScripting▲111

    Proofreading and editing done right

    2015

15. 15TA
    Translate Any Text to Emojis▲117

    2020 · emojitype.space

16. 16MM
    Massren – multi-rename tool using your text editor▲61

    2014 · github.com

17. 17IM
    I'm Creating a GitHub Repo Quality Bot▲58

    2018 · github.com

18. 18SA
    Shortly, a serverless pastebin▲58

    2012 · lucaspiller.github.com

19. 19LA
    Let AI rewrite your text▲6

    2021 · uglot.ai

20. 20AV
    Authentic Virtual Letters For The Web▲9

    2012 · blog.bubbleideas.com

21. 21PA
    Proofville, A Competitive Editing Game – Crowdsource Your Proofreading▲36

    2013 · proofist.com

22. 22TU
    TrueCaptcha -Using Deep learning to solve text captchas▲6

    2019 · apitruecaptcha.org

23. 23RC
    rePOWCHA – CAPTCHA that stops Humans, powered by crypto▲9

    2021 · repowcha.com

24. 24EA
    Emoji + ASCII domain registration▲8

    2017 · xn--i-7iq.ws

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