Three steps. Under 200ms. Your users never notice.
Add 3 lines of HTML. The widget loads asynchronously — your page speed is unaffected.
SHA-256 Proof of Work runs in the background. Takes ~200ms for humans, minutes for bots.
Your backend sends the token to our API. One SHA-256 check — verified in under 1ms.
Built from the ground up for privacy, speed, and bot resistance.
No cookies, no tracking, no personal data. Fully GDPR compliant. Fingerprints are hashed — raw data never leaves the browser.
Clients solve SHA-256 puzzles. Adaptive difficulty based on IP reputation. Bots pay in compute, humans barely notice.
AI solves image captchas in milliseconds. Crovly uses PoW + fingerprinting + headless detection instead.
Under 25KB gzipped widget with zero dependencies and 42 languages built-in. Works anywhere — any framework, any backend, any infrastructure.
Mouse movement, keystroke patterns, scroll behavior — 10 statistical signals scored server-side. Bots can't fake natural human behavior.
Tokens are bound to the solving IP. Human farms can't resell solutions — tokens are useless from a different IP.
See how Crovly stacks up against other captcha solutions.
| Feature | Crovly | reCAPTCHA | Turnstile | hCaptcha |
|---|---|---|---|---|
| Privacy | Yes | No | Partial | Partial |
| Image captcha | No | Yes | No | Yes |
| Proof of Work | Yes | No | Yes | No |
| Self-hostable | Partial | No | No | No |
| AI bypass resistant | Yes | No | Partial | No |
| Human farm resistant | Yes | No | No | No |
| Zero cookies | Yes | No | Yes | Yes |
| GDPR compliant | Yes | No | Yes | Yes |
| Behavioral analysis | Yes | No | No | No |
The average person spends 12 hours a year proving they're human.
That's time you could spend with family, friends, or doing what you love.
Crovly verifies you in under 200ms — invisibly, privately, no puzzles.
Add Crovly to any website or framework. Three lines to get started.
<script src="https://get.crovly.com/widget.js"
data-site-key="your-site-key"></script>
<form>
<div id="crovly-captcha"></div>
<button type="submit">Submit</button>
</form>First-party packages for every major platform. Open source, actively maintained.
Everything you need to know about Crovly.
Unlimited verifications on every plan. No surprises.