GateCHA

Self-hosted CAPTCHA management server, an open-source alternative to ALTCHA Sentinel

Webfreeglobal

GateCHA is a self-hosted, open-source management server for ALTCHA proof-of-work CAPTCHAs, offered as an alternative to the commercial ALTCHA Sentinel service. It provides per-site API keys, replay protection, and a statistics dashboard for tracking CAPTCHA verifications, all running on infrastructure the operator controls. It's for website operators who want CAPTCHA bot protection without depending on a third-party hosted management service.

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Full match profile

Behind the summary, Matchbox keeps a richer profile of GateCHA - 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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