ALTCHA uses a proof-of-work mechanism to protect your website, APIs, and online services from spam and unwanted content. Unlike other solutions, ALTCHA is free, open-source and self-hosted, without external services, does not use cookies nor fingerprinting, does not track users, and is fully compliant with GDPR.
Privacy-friendly, GDPR compliant
No cookies, no tracking, no external servers.
Frustration-free
No visual puzzles. PoW Captcha is better for people.
Spam Filtering
Employs machine learning to categorize submitted data and identify unwanted messages.
Open-source
Free to use, free to modify. MIT licensed.
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What makes ALTCHA unique is that it is free, open-source and self-hosted, without external services, does not use cookies nor fingerprinting, does not track users, and is fully compliant with GDPR. Unlike other captcha solutions, ALTCHA does not require users to solve puzzles or captchas and uses a proof-of-work mechanism instead.
Here are some key reasons why a person should choose ALTCHA over its competitors:
So in summary, ALTCHA's privacy compliance, open design, accessibility, machine compatibility and modern approach give it clear advantages over competing captcha solutions.
JavaScript and Svelte.
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This is an informative page about ALTCHA. You can review and discuss the product here. The primary details have been verified within the last quarter. So they could be considered up to date. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.
Altcha is the best free alternative to Recaptcha. It's advanced too. It has facility to identify humans without showing captcha.