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Altcha
Open-source self-hosted proof-of-work CAPTCHA.
| Category | CAPTCHA & Bot Protection |
|---|---|
| Authentication | No auth |
| Pricing | Free |
| Website | https://altcha.org/ |
| Docs | https://altcha.org/docs |
| Last checked | 2026-10-14 |
| As JSON | /api/v1/directory/altcha.json |
Information is summarised in our own words and may be out of date; check the vendor's site for current terms and prices. Not affiliated with Altcha. Suggest a correction.