Tiago
cap — modern, lightning-quick PoW captcha
cap is a lightweight, modern open-source CAPTCHA alternative designed using SHA-256 PoW.
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why Cap?
- ⚡️ 250x smaller than hCaptcha
cap's widget library is extremely small, only 12kb minified and brotli'd. - 🔒️ Private
cap's usage of proof-of-work eliminates the need for any tracking, fingerprinting or data collection. - 🌈 Fully customizable
cap is self-hostable so you can customize both the backend & frontend — or you can just use CSS variables - 🤖 PoW-based
cap uses proof-of-work instead of complex puzzles, making it easier for humans and harder for bots - 🧩 Standalone mode
cap offers a standalone mode with Docker, allowing you to use it with languages other than JS. - 💨 Invisible mode
cap can run invisibly in the background using a simple JS API. - ☁️ Floating mode
floating mode keeps your CAPTCHA hidden until it's needed - 🌳 Fully FOSS
completely open source under the Apache license 2.0 license