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This repository was archived by the owner on Mar 27, 2026. It is now read-only.
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# ALTCHA for WordPress
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This repository contains the offical ALTCHA plugin for WordPress.
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> [!TIP]
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> [ALTCHA Plugin version 2](https://altcha.org/docs/v2/wordpress/) is now available, offering improved protection and enhanced reliability. An upgrade is recommended for all users.
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**This repository contains the offical ALTCHA plugin for WordPress version 1.**
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**For the new version 2, see [github.com/altcha-org/altcha-wordpress-next](https://github.com/altcha-org/altcha-wordpress-next) repository.**
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What's new in version 2:
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***Effective**: blocks 99% of spam and abuse attempts
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***Invisible for users**: frictionless protection, no puzzles or CAPTCHAs
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***Works everywhere**: plugin-agnostic [Request Interceptor](https://altcha.org/docs/v2/wordpress/features/#request-interceptor--works-everywhere) integrates with any form plugin
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***Handles heavy traffic**: stay online with [Under Attack Mode](https://altcha.org/docs/v2/wordpress/features/#under-attack-mode--stay-online-under-pressure)
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***Stops abuse at scale**: firewall and rate limiting included
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***Privacy-first**: 100% GDPR-compliant and fully accessible
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* Description: ALTCHA is a free, open-source CAPTCHA alternative that offers robust protection without using cookies, ensuring full GDPR compliance by design. It also provides invisible anti-spam and anti-bot protection through ALTCHA's API.
<strong>ALTCHA Plugin version 2 is now available, offering improved protection and enhanced reliability. An upgrade is recommended for all users.</strong>
* **Effective**: blocks 99% of spam and abuse attempts
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* **Invisible for users**: frictionless protection, no puzzles or CAPTCHAs
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* **Works everywhere**: plugin-agnostic [Request Interceptor](https://altcha.org/docs/v2/wordpress/features/#request-interceptor--works-everywhere) integrates with any form plugin
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* **Handles heavy traffic**: stay online with [Under Attack Mode](https://altcha.org/docs/v2/wordpress/features/#under-attack-mode--stay-online-under-pressure)
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* **Stops abuse at scale**: firewall and rate limiting included
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* **Privacy-first**: 100% GDPR-compliant and fully accessible
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* **Unlimited**: no external services, unlimited verifications
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Learn more about ALTCHA at [altcha.org](https://altcha.org).
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[ALTCHA](https://altcha.org) provides a free, open-source Captcha alternative utilizing a proof-of-work mechanism to safeguard your website against spam and unwanted content. Our anti-spam solution ensures robust spam protection without compromising user privacy.
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