Yes. Cap is open source under a custom licence. Its source code is on GitHub at tiagozip/cap and is written mainly in JavaScript.

Yes. Cap is open source, so the software itself is free to use under the terms of its own licence.

Yes. Cap can be self-hosted on your own server or infrastructure.

Is Cap actively maintained?

Yes. The most recent commit to Cap was on 4 October 2026. The project has 7.9k stars on GitHub.

Cap

Open source

Cap is a free, open-source CAPTCHA alternative. Self-hosted, privacy-first, no Google. Pro

Cap is a free, open-source CAPTCHA alternative. Self-hosted, privacy-first, no Google. Pro

Built with: JavaScript tools
Tags: captcha; javascript; proof-of-work; antispam; anti-abuse; anti-bot; defense; anti-scraper

What is Cap?: Cap is a free, open-source CAPTCHA alternative. Self-hosted, privacy-first, no Google. Pro.
Is Cap open source?: Yes. Cap is open source under a custom licence. Its source code is on GitHub at tiagozip/cap and is written mainly in JavaScript.
Is Cap free?: Yes. Cap is open source, so the software itself is free to use under the terms of its own licence.
Can I self-host Cap?: Yes. Cap can be self-hosted on your own server or infrastructure.
Is Cap actively maintained?: Yes. The most recent commit to Cap was on 4 October 2026. The project has 7.9k stars on GitHub.