Dev tools · alternatives · 2026

24 alternatives to ZENCAPTCHA

Privacy-first bot & spam defense, GDPR compliant CAPTCHA

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. ZENCAPTCHA launched in 2023; newer entries below may have overtaken it.

1. 1
   adCAPTCHA▲148

   Secure your site, elevate your brand, boost ad revenue

   2024 · adcaptcha.com · its alternatives →

2. 2
   powCAPTCHA▲10

   Next-gen captcha | anti bot & spam filter

   2025 · powcaptcha.com · its alternatives →

3. 3
   Google Invisible reCAPTCHA▲428

   Protects your website from spam and abuse

   2017 · cloud.google.com · its alternatives →

4. 4
   Procaptcha▲3

   An open-source captcha alternative to stop bots and fraud

   2024 · prosopo.io · its alternatives →

5. 5
   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 · its alternatives →

6. 6WW
   wehatecaptchas – we’ll keep the bots out without annoying your users▲136

   2019 · wehatecaptchas.com · its alternatives →

7. 7
   Cap▲428

   A lightweight, modern open-source captcha

   2025 · capjs.js.org · its alternatives →

8. 8
   Replace CAPTCHAs with WebAuthn passkeys for bot prevention▲71

   I built Nocaptcha after getting frustrated with traditional CAPTCHAs both as a user and developer. WebAuthn passkeys offered a promising alternative that's both more secure and user-friendly. What makes Nocaptcha different: - Uses WebAuthn standard instead of puzzle-solving - No need for users to remember passwords or solve puzzles - Open source Current limitation: Working with W3C WebAuthn Community Group on true passkey disposal for this use case. Looking for feedback particularly on: 1. Integration experience 2. User experience compared to traditional CAPTCHAs

   2024 · github.com · its alternatives →

9. 9
   reCAPTCHA v3▲222

   The next generation reCAPTCHA

   2018 · developers.google.com · its alternatives →

10. 10FA
    FriendlyCaptcha – a privacy friendly proof-of-work based CAPTCHA▲9

    Friendly Captcha is a privacy-compliant, accessible alternative to traditional CAPTCHAs. It protects your websites and apps from bots and spam.

    2020 · friendlycaptcha.com · its alternatives →

11. 11
    Zenfetch▲264

    Turn notes and browser history into a personal AI

    2024 · zenfetch.com · its alternatives →

12. 12
    TrustCaptcha

    Invisible CAPTCHA for privacy-focused teams

    Mar 2026 · trustcomponent.com · its alternatives →

13. 13
    WeHateCaptchas▲208

    Keep the bots out without annoying your users

    2019 · its alternatives →

14. 14
    MTCaptcha▲2

    Enterprise CAPTCHA / NoCAPTCHA Solution

    2019 · mtcaptcha.com · its alternatives →

15. 15
    Lemin CAPTCHA▲77

    Hassle-free CAPTCHA. Stop Bots, Stay Secure.

    2023 · dashboard.leminnow.com · its alternatives →

16. 16
    hCaptcha for WP▲10

    hCaptcha protects privacy while blocking spam bots

    2024 · wordpress.org · its alternatives →

17. 17
    Think CaptchaPro▲8

    ThinkCaptcha WordPress Plugin Anti-Spam & Bot Protection

    2025 · thinkplugin.com · its alternatives →

18. 18
    EasyCaptcha▲1

    Protects your website and forms against spam and bots

    2021 · its alternatives →

19. 19
    AZcaptcha▲6

    An automatic image and captcha recognition service

    2018 · azcaptcha.com · its alternatives →

20. 20
    Clawptcha▲9

    Reverse CAPTCHA that proves you're a bot, not a human.

    Feb 2026 · clawptcha.com · its alternatives →

21. 21
    Contextual Moderation for Chat▲69

    AI-powered moderation for safer chat experiences

    May 2026 · cometchat.com · its alternatives →

22. 22
    Procaptcha – Open-source, privacy preserving and frictionless CAPTCHA▲8

    We built Procaptcha to make sure there's an actually good alternative to Google's ReCAPTCHA that's not a complete nightmare for the end user. Crucially we're not just a giant ad network like almost all CAPTCHA providers [1]. Like with other CAPTCHA providers it's simple to set up, you just change a couple of tags [2]. We've got a few different CAPTCHA types at the moment, all running on a distributed network of nodes with no user tracking. [1] https://prosopo.io/articles/stop-giving-your-website-data-aw... [2] https://github.com/prosopo/captcha

    2024 · prosopo.io · its alternatives →

23. 23
    sCaptcha▲5

    A privacy-based captcha you can count on

    Dec 2025 · its alternatives →

24. 24
    noCaptcha: Automatic CAPTCHA Solver▲5

    Fast and cheap hCaptcha, reCaptcha, OCR Captcha solving

    2023 · nocaptchaai.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 →