Open-source projects tagged “Spam Protection”.

AL

ALTCHA

MIT

GDPR, WCAG 2.2 AA, and EAA compliant, self-hosted CAPTCHA alternative with PoW mechanism.

InfrastructureOpen-source projects grouped in this category for discovery and comparison.1 project#TypeScriptProjects tagged with this topic in the verified catalog.3 projectsGithub ActionsProjects tagged with this topic in the verified catalog.5 projectsJavaScriptProjects tagged with this topic in the verified catalog.5 projectsSelf-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.3 self-hosted optionsreCAPTCHAProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…5 alternatives

MC

mCaptcha

AGPL-3.0

A no-nonsense CAPTCHA system with seamless UX | Backend component

Security & PrivacyOpen-source projects grouped in this category for discovery and comparison.4 projects#RustProjects tagged with this topic in the verified catalog.1 projectGithub ActionsProjects tagged with this topic in the verified catalog.5 projectsJavaScriptProjects tagged with this topic in the verified catalog.5 projectsSelf-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.3 self-hosted optionsreCAPTCHAProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…5 alternatives

PR

Procaptcha

Apache-2.0

Open-source, frictionless CAPTCHA and bot defense. A privacy-focused alternative to reCAPTCHA and hCaptcha.

Security & PrivacyOpen-source projects grouped in this category for discovery and comparison.4 projects#TypeScriptProjects tagged with this topic in the verified catalog.3 projectsGithub ActionsProjects tagged with this topic in the verified catalog.5 projectsJavaScriptProjects tagged with this topic in the verified catalog.5 projectsreCAPTCHAProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…5 alternatives

PR

PrivateCaptcha

License not declared

Independent, privacy-first, self-hostable PoW CAPTCHA service made in EU

Security & PrivacyOpen-source projects grouped in this category for discovery and comparison.4 projects#GoProjects tagged with this topic in the verified catalog.1 projectGithub ActionsProjects tagged with this topic in the verified catalog.5 projectsJavaScriptProjects tagged with this topic in the verified catalog.5 projectsSelf-hostedThis project carries a self-hosting or local-deployment signal. Verify the official install guide before production use.3 self-hosted optionsreCAPTCHAProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…5 alternatives

FR

Friendly Captcha

MPL-2.0

The SDK that is used to integrate Friendly Captcha v2 into your website. Protect your websites and online services from spam and abuse with Friendly Captcha, the privacy-first anti-bot solution.

Security & PrivacyOpen-source projects grouped in this category for discovery and comparison.4 projects#TypeScriptProjects tagged with this topic in the verified catalog.3 projectsGithub ActionsProjects tagged with this topic in the verified catalog.5 projectsJavaScriptProjects tagged with this topic in the verified catalog.5 projectsreCAPTCHAProprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, reposit…5 alternatives