Life & fun · alternatives · 2026

Replace CAPTCHA with Proof-of-Work is a security solution launched in 2014 that offers an alternative to traditional CAPTCHA verification. Instead of solving puzzles or identifying images, users complete computational… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Replace CAPTCHA with Proof-of-Work launched in 2014; newer entries below may have overtaken it.

1. 1
   Cap▲428

   A lightweight, modern open-source captcha

   2025 · capjs.js.org · its alternatives →

2. 2
   DOOM Captcha▲512

   Captchas don't have to be boring

   2021 · vivirenremoto.github.io · its alternatives →

3. 3
   P-captcha▲6

   Open source proof-of-work captcha for bot protection

   2025 · p-captcha.com · its alternatives →

4. 4
   Captcharoo▲88

   Proof of humanity, check that you're not talking with an AI

   2023 · captcharoo.com · its alternatives →

5. 5
   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 →

6. 6
   Proven – An alternative to Twitter's verified accounts, with HN support▲334

   🔑✅ An alternative to Twitter's verified accounts powered by Keybase. - dschep/proven

   2018 · github.com · its alternatives →

7. 7TC
   The Captcha Experiment▲15

   2011 · thecaptchaexperiment.com · its alternatives →

8. 8TT
   Tricking the user to access history using CSS and captchas▲140

   2014 · frantzmiccoli.github.io · its alternatives →

9. 9
   Are You a Human?▲67

   Ending the CAPTCHA agony in a unique way.

   2013 · areyouahuman.com · its alternatives →

10. 10
    Humans Not Invited▲237

    CAPTCHA that filters out humans and only lets programs pass

    2018 · humansnotinvited.com · its alternatives →

11. 11
    WeHateCaptchas▲208

    Keep the bots out without annoying your users

    2019 · its alternatives →

12. 12
    Roundtable▲122

    Proof of Human API

    2025 · poh.org · its alternatives →

13. 13
    No CAPTCHA reCAPTCHA▲181

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

    2014 · cloud.google.com · its alternatives →

14. 14FA
    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 →

15. 15
    Captcha Stickers▲64

    So many bots out there, be sure who's on the other side.

    2016 · apps.apple.com · its alternatives →

16. 16
    ProofShot – Give AI coding agents eyes to verify the UI they build▲161

    I use AI agents to build UI features daily. The thing that kept annoying me: the agent writes code but never sees what it actually looks like in the browser. It can’t tell if the layout is broken or if the console is throwing errors. So I built a CLI that lets the agent open a browser, interact with the page, record what happens, and collect any errors. Then it bundles everything — video, screenshots, logs — into a self-contained HTML file I can review in seconds. proofshot start --run "npm run dev" --port 3000 # agent navigates, clicks, takes screenshots proofshot stop It works with…

    Mar 2026 · github.com · its alternatives →

17. 17
    Uruky (EU-based Kagi alternative) now has Image Search and URL Rewrites▲236

    You can get a 2h free trial by solving a proof-of-work captcha when topping up your account for the first time. If you'd like to learn more, an independent interview was posted a couple of weeks ago [1], and the FAQ [2] has a lot of information as well. For the source code sharing, we've talked with lawyers and are inclined to no longer require the NDA/NCC for privacy reasons shared with us before (signing requires identification), but instead use a source-available permissive license that doesn't allow competition, like PolyForm Shield [3] (we do still have about 6 months before…

    Jun 2026 · uruky.com · its alternatives →

18. 18BC
    BoundIt CAPTCHA: highlight objects in photos to prove you're human▲24

    2013 · boundit.co · its alternatives →

19. 19
    powCAPTCHA▲10

    Next-gen captcha | anti bot & spam filter

    2025 · powcaptcha.com · its alternatives →

20. 20GA
    Get a verifiable human proof seal for your content▲13

    Get a unique seal and url that is verifiable. Display a unique badge next to your content that proves there is a human behind the content.

    2023 · humanproved.com · its alternatives →

21. 21
    Proofly ▲129

    Private AI proofreading that runs 100% on your device

    Dec 2025 · chromewebstore.google.com · its alternatives →

22. 22
    Shield▲77

    Authentication & payment for any website without code

    2021 · its alternatives →

23. 23
    Lemin CAPTCHA▲77

    Hassle-free CAPTCHA. Stop Bots, Stay Secure.

    2023 · dashboard.leminnow.com · its alternatives →

24. 24
    Graboxy maze CAPTCHA▲122

    Brandable captcha that is fun & easy to solve

    2021 · 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 →