* [React hCaptcha Component Library v2.2.0](https://github.com/hCaptcha/react-hcaptcha) – hCaptcha component library for ReactJS and Preact that protects user privacy.

* [FCaptcha v1.34.0](https://github.com/WebDecoy/FCaptcha) – Detect bots, vision-based AI agents, headless browsers and automation using 40+ behavioral signals plus server-verified SHA-256 proof-of-work.

* [ALTCHA v3.2.2](https://github.com/altcha-org/altcha) – Self-hosted privacy-first security solution protecting websites and APIs from spam using a proof-of-work mechanism.

* [Private Captcha v1.41.0](https://github.com/PrivateCaptcha/PrivateCaptcha) – Independent, privacy-first, self-hostable Proof-of-Work CAPTCHA service built in the EU.

* [React Turnstile @marsidev/react-turn...](https://github.com/marsidev/react-turnstile) – Cloudflare Turnstile integration for React applications offering automatic script injection, SSR readiness, and TypeScript support.

* [better-captcha @better-captcha/soli...](https://github.com/LuggaPugga/better-captcha) – Framework-agnostic wrappers for CAPTCHA providers sharing lifecycle, render flow, and control handle to swap vendors without changing UI.