Dev tools · alternatives · 2026
24 alternatives to P-captcha
Open source proof-of-work captcha for bot protection
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
- 1RC
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 →
- 5
Hassle-free CAPTCHA. Stop Bots, Stay Secure.
2023 · dashboard.leminnow.com · its alternatives →
- 6
ZENCAPTCHA▲115Privacy-first bot & spam defense, GDPR compliant CAPTCHA
2023 · zencaptcha.com · its alternatives →
- 7FA
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 →
- 8
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
Google's update to CAPTCHA just asks if you're robot
2014 · cloud.google.com · its alternatives →
- 10
So many bots out there, be sure who's on the other side.
2016 · apps.apple.com · its alternatives →
- 11TT
2014 · frantzmiccoli.github.io · its alternatives →
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GeeTest▲68Smarter way to stop bad bots, protect websites, apps & APIs
2021 · geetests.com · its alternatives →
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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 →
- 16
CAPTCHA that filters out humans and only lets programs pass
2018 · humansnotinvited.com · its alternatives →
- 17
Race to solve CAPTCHAs, last player standing wins
Apr 2026 · sean-reid.github.io · its alternatives →
- 18
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 →
- 19
An open-source captcha alternative to stop bots and fraud
2024 · prosopo.io · its alternatives →
- 20
A CAPTCHA gate for noisy GitHub PRs
Jun 2026 · pr-captcha.aryaabyte.workers.dev · its alternatives →
- 21WW
2019 · wehatecaptchas.com · its alternatives →
- 22
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 →
- 23TC
2011 · thecaptchaexperiment.com · its alternatives →
- 24
BOTCHA▲3Traditional CAPTCHAs keep bots out.This one keeps humans out
Feb 2026 · botcha-verify.vercel.app · 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 →