A lightweight, modern open-source captcha
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Description
Cap is a lightweight, modern open-source CAPTCHA alternative that uses SHA256 proof-of-work to verify real users and block bots. It is designed to be privacy-friendly, fast, and efficient, with no cookies or trackers involved.
How to use Cap?
To use Cap, integrate the widget into your application by including the JavaScript API. You can customize the appearance using CSS variables and deploy it using Docker for standalone mode if needed.
Core features of Cap:
1️⃣
Extremely small widget library (only 12kb minified and brotli'd)
2️⃣
Uses proof-of-work to eliminate tracking and data collection
3️⃣
Fully customizable and self-hostable
4️⃣
Offers a standalone mode with Docker
5️⃣
Can run invisibly in the background using a simple JS API
Why could be used Cap?
| # | Use case | Status | |
|---|---|---|---|
| # 1 | Protecting APIs from bots | ✅ | |
| # 2 | Preventing spam on forms | ✅ | |
| # 3 | Blocking automated login attempts | ✅ | |
Who developed Cap?
Cap is developed by Tiago Rangel, who focuses on creating privacy-friendly and efficient solutions for web security.