cap
Offensive & PentestingCap is a lightweight, modern open‑source CAPTCHA alternative that replaces visual puzzles with privacy‑preserving proof‑of‑work and instrumentation challenges.
Features
- 250× smaller than hCaptcha (~20 KB, loads in milliseconds)
- Privacy‑first – no telemetry or tracking data sent
- Fully customizable via CSS variables (colors, size, position, icons)
- Proof‑of‑work challenges eliminate the need for user interaction
- Standalone Docker container for easy deployment anywhere
Recent releases
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About
Stars
7,330
Forks
505
Languages
JavaScript
CSS
Rust
Downloads/week
14,398
↑8%
NPM Maintainers
1
Contributors
31
TypeScript
Types included ✓
Install & Platforms
Install via
docker
Similar tools
Alternative to
reCAPTCHA
hCaptcha
Cloudflare Turnstile