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| Cap |
A modern, lightning-quick PoW captcha |
Cap is a lightweight, modern open-source CAPTCHA alternative using SHA-256 proof-of-work |
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VitePress |
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Quickstart & docs |
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250x smaller than hCaptcha |
Cap's widget library is extremely small, only 12kb minified and brotli'd. |
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Private |
Cap's usage of proof-of-work eliminates the need for any tracking, fingerprinting or data collection. |
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Fully customizable |
Cap is self-hostable so you can customize both the backend & frontend — or you can just use CSS variables |
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PoW-based |
Cap uses proof-of-work instead of complex puzzles, making it easier for humans and harder for bots |
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Standalone mode |
Cap offers a standalone mode with Docker, allowing you to use it with languages other than JS. |
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Invisible mode |
Cap can run invisibly in the background using a simple JS API. |
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Floating mode |
Floating mode keeps your CAPTCHA hidden until it's needed |
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Fully FOSS |
Completely open source under AGPL-3.0, with no premium versions. |
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Tiago