Life & fun · alternatives · 2026
24 alternatives to The Captcha Experiment
The Captcha Experiment is a fun project that turns CAPTCHAs—those security puzzles designed to verify you're human—into an interactive experience. Launched in 2011, it reimagines the typically mundane verification… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. The Captcha Experiment launched in 2011; newer entries below may have overtaken it.
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CAPTCHA that filters out humans and only lets programs pass
2018 · humansnotinvited.com · its alternatives →
- 3RC
2014 · hashcash.io · its alternatives →
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Captcharoo▲88Proof of humanity, check that you're not talking with an AI
2023 · captcharoo.com · its alternatives →
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Ending the CAPTCHA agony in a unique way.
2013 · areyouahuman.com · its alternatives →
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- 7TT
2014 · frantzmiccoli.github.io · its alternatives →
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A free browser puzzle that turns CAPTCHAs into play
Jul 2026 · captchagame.cc · its alternatives →
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PG has posted about improving social networks using something like an "intellectual CAPTCHA" many times [1][2][3][4] - "Make users pass a test on basic concepts like the distinction between necessary and sufficient conditions before they can tweet." I felt the same way. So I built one using a mix of simple math, logic, and Twitter/X Community Noted posts. Try sample questions here - https://mentwire.com/sample - without signing up. - Invites are temporarily open to HN users. - Onboarding test + one daily question before accessing feed, post or reply. - Posts authors are…
Apr 2026 · mentwire.com · its alternatives →
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Race to solve CAPTCHAs, last player standing wins
Apr 2026 · sean-reid.github.io · its alternatives →
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Google's update to CAPTCHA just asks if you're robot
2014 · cloud.google.com · its alternatives →
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GeeTest▲68Smarter way to stop bad bots, protect websites, apps & APIs
2021 · geetests.com · its alternatives →
- 15
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 →
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CaptionsLab▲98Generate funny Instagram captions in under 1 minute
2023 · captions.ai · its alternatives →
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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 →
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Squat Captcha▲231The worst captcha ever! Forces you to do 10 squats
2020 · vivirenremoto.github.io · its alternatives →
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Be the first to crack the game to win a certified gold bar
2022 · apps.apple.com · its alternatives →
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Open-source TypeScript SDK for human verification. Maze interaction with motor-control analysis, 12 behavioral features scored server-side against per-maze baselines. No ML inference, no third-party calls.
Mar 2026 · cerno.sh · its alternatives →
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So many bots out there, be sure who's on the other side.
2016 · apps.apple.com · its alternatives →
- 22BC
2013 · boundit.co · its alternatives →
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Open source proof-of-work captcha for bot protection
2025 · p-captcha.com · its alternatives →
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Capshun▲95AI that creates captions & hashtags for photos in seconds 📸
2019 · apps.apple.com · its alternatives →
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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 →