Cap
Self-hosted CAPTCHA alternative that verifies visitors with proof-of-work and instrumentation challenges instead of puzzles.
Cap is a self-hosted CAPTCHA that checks visitors with proof-of-work and instrumentation challenges, which the visitor’s browser solves in the background. The browser side is the cap-widget package from npm, a web component that a site can also load from a CDN. The server side is Cap Standalone, a Bun program that runs from the tiago2/cap Docker image, keeps its data in Redis or Valkey, and offers a web dashboard for site keys, a REST API and a verification endpoint compatible with reCAPTCHA. The project is made by tiago.zip.
Worth knowing
The widget and the standalone server have separate release lines in one repository.
Identity
- Status
- Active
- Maintainer
- tiago.zip4
- Maintained by
- Individual5
- First release
- 20256
Rendering and deploy
Releases
Adoption
Sources
- 2026-11-03: links, Categories
trycap.dev - 2026-11-03: links, GitHub stars
github.com/tiagozip/cap - 2026-11-03: links, Install with, Content API
trycap.dev/guide/ - 2026-11-03: Maintainer, Runtime, Install with, Admin interface
trycap.dev/guide/standalone/ - 2026-11-03: Maintained by
api.github.com/users/tiagozip - 2026-11-03: First release
api.github.com/repos/tiagozip/cap/releases - 2026-11-03: Written in
api.github.com/repos/tiagozip/cap - 2026-11-03: Install with
trycap.dev/guide/widget - 2026-11-03: License, License model
raw.githubusercontent.com/tiagozip/cap/main/README.md - 2026-11-03: Current major version, Last release
github.com/tiagozip/cap/releases/tag/standalone@3.1.13 - 2026-11-03: Contributors
api.github.com/repos/tiagozip/cap/contributors?per_page=1 - 2026-11-03: npm downloads a week
api.npmjs.org/downloads/range/2026-10-26:2026-11-01/cap-widget - 2026-11-03: Multilingual
trycap.dev/guide/widget.html