# Procaptcha: Free Open Source Alternative to Cloudflare Turnstile, hCaptcha, reCAPTCHA

Canonical: https://caniforkit.com/fork/procaptcha
Last updated: 2026-11-07

Procaptcha (Open Source, Open Source) replaces Cloudflare Turnstile, hCaptcha, reCAPTCHA. A blockchain-based CAPTCHA solution offering improved security, user experience, and resistance to bot attacks for web applications.

## Tool Specifications
- **Tool Name**: Procaptcha
- **Type**: Open Source Project
- **License**: Open Source
- **Official Website**: https://prosopo.io/
- **GitHub Repository**: https://github.com/prosopo/captcha
- **GitHub Stars**: ★ 303
- **Runs On**: Local
- **Maintenance Status**: nov 2026
- **Platforms**: desktop, cross-platform, one-click install
- **Data Storage**: All application data lives locally on your own machine.
- **Installation**: Clone https://github.com/prosopo/captcha or deploy with Docker Compose
- **Setup Requirements**: Download the native package or installer for your operating system.
- **The Catch / Limitation**: Community-driven open source project without dedicated enterprise SLAs.

## Paid SaaS Applications Replaced (3)
Replacing these paid tools with Procaptcha saves up to $45/mo ($540/yr) in software subscriptions:

| Replaced Software | Category | SaaS Price | Comparison Guide |
| --- | --- | --- | --- |
| [Cloudflare Turnstile](https://caniforkit.com/cloudflare-turnstile) | [automation](https://caniforkit.com/category/automation) | $15/mo | [Compare Cloudflare Turnstile vs Procaptcha](https://caniforkit.com/vs/cloudflare-turnstile-vs-procaptcha) |
| [hCaptcha](https://caniforkit.com/hcaptcha) | [automation](https://caniforkit.com/category/automation) | $15/mo | [Compare hCaptcha vs Procaptcha](https://caniforkit.com/vs/hcaptcha-vs-procaptcha) |
| [reCAPTCHA](https://caniforkit.com/recaptcha) | [automation](https://caniforkit.com/category/automation) | $15/mo | [Compare reCAPTCHA vs Procaptcha](https://caniforkit.com/vs/recaptcha-vs-procaptcha) |

## Frequently Asked Questions

### Is Procaptcha free and open source?
Procaptcha is an open source tool licensed under Open Source that runs on local. A blockchain-based CAPTCHA solution offering improved security, user experience, and resistance to bot attacks for web applications.

### What is the trade-off or limitation of using Procaptcha?
Community-driven open source project without dedicated enterprise SLAs.

## Related

- [Self-Hosted Open Source Directory](https://caniforkit.com/self-hosted)
- [All Paid SaaS Alternatives Index](https://caniforkit.com/alternatives)
- [Software Categories Directory](https://caniforkit.com/categories)
- [Homepage](https://caniforkit.com)