Next-Gen Captcha
and Spam Protection
AntiSpam
ALTCHA’s AntiSpam offers a powerful combination of Captcha and intelligent Spam Filtering, blocking unwanted submissions before they get to you.
It ensures reliable protection from bots and spam, all while keeping the user experience smooth, frustration-free and GDPR compliant.
Free Captcha
ALTCHA uses a proof-of-work mechanism to protect your website, apps, APIs, and online services from spam and unwanted content.
Unlike other solutions, ALTCHA’s Captcha alternative is free, open-source and self-hosted, does not use cookies nor fingerprinting, does not track users.
ALTCHA SaaS goes beyond spam protection with privacy-friendly Analytics for real-time insights and Forms for secure, seamless data collection.
Analytics
Public BetaALTCHA Analytics offers a privacy-first, cookie-free alternative to Google Analytics, providing real-time, actionable insights into your audience while respecting their privacy.
Forms
Public BetaALTCHA Forms enables secure data collection through registration and personal data forms, questionnaires, and surveys, ensuring compliance with data protection regulations such as GDPR.
| Analytics: | 1,000 events / day |
| AntiSpam: | 50 verifications / day |
| Forms: | 10 forms |
Increase the limits by purchasing additional volume or add-ons.
Add-Ons
Robust Abuse Protection and Privacy
ALTCHA combines Proof of Work (PoW) and an advanced Spam Filter to deliver robust spam and abuse protection. PoW creates computational barriers for bots, while the Spam Filter checks IPs, detects proxies, and uses blacklists to block malicious sources.
This approach ensures high effectiveness and privacy compliance, offering a strong alternative to traditional CAPTCHA solutions.
- New feature: Data obfuscation - safeguard your email from automated scraping.
- The Spam Filter now supports 19 languages and features improved language detection.
- Explore the new Floating UI allowing for even smoother UX.
- Introducing ALTCHA Forms - a secure data collection platform compliant with GDPR.
Get started
with ALTCHA
The easiest way to integrate ALTCHA into your websites or apps is through our SaaS platform. Simply create an account and follow the integration guides and documentation.
For our free, open-source CAPTCHA alternative, check out the documentation to get started.
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Project sponsored by BAUSW.com - Digital Construction Site Diary, promoting transparency and trust in construction projects with real-time documentation.
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