ALTCHA

Privacy-friendly, GDPR-compliant CAPTCHA alternative using proof-of-work with no cookies or tracking.

Servicefreemiumglobal

A privacy-focused, self-hostable CAPTCHA alternative that uses a proof-of-work mechanism instead of image puzzles to provide bot and spam protection without cookies or user tracking. Designed for web developers, privacy-conscious organizations and public institutions, it helps sites meet GDPR requirements while reducing user friction and is available as open-source with an optional paid Pro plan.

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Full match profile

Behind the summary, Matchbox keeps a richer profile of ALTCHA - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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