About
We believe security should protect people without compromising their privacy, accessibility, or freedom. ALTCHA was created as a modern alternative to traditional CAPTCHA systems — one that does not require tracking users, sending their data to third parties, or forcing people through frustrating visual puzzles.
Our products are designed to give organizations effective protection against bots and abuse while keeping control where it belongs: with the people who operate the software and the users who interact with it. ALTCHA is built to be self-hosted, privacy-first, accessible, transparent, and practical for organizations with demanding security and compliance requirements.
Dedicated to privacy.
We build security that respects people, organizations, and the open web.
ALTCHA
Built and operated in the EU
ALTCHA is built and operated in the European Union, with a strong focus on privacy, security, and data sovereignty. Our European roots shape how we design and operate our products — from keeping data under your control to meeting demanding European privacy and compliance requirements.
#1 Privacy-First CAPTCHA Alternative
ALTCHA is the most-used and fastest growing CAPTCHA widget with 250,000+ live websites according to builtwith.com.
Trusted by governments and organizations worldwide.
Our Values
Privacy
Privacy is not an add-on or a configuration option — it is a foundation. ALTCHA is designed without tracking, fingerprinting, or unnecessary data collection. With self-hosted deployments, data stays within your own infrastructure instead of being sent to an external CAPTCHA provider.
Accessibility
Security should never come at the expense of inclusion. We believe protection should work for everyone, including people using assistive technologies. ALTCHA is designed around accessible, frictionless verification and follows modern accessibility standards, including WCAG 2.2.
Transparency
Trust requires more than promises. It requires visibility into how software works, what data it processes, and where it operates. We aim to make our technology, security practices, licensing, and compliance position clear and verifiable.
Ownership
Your infrastructure should remain yours. ALTCHA is built to run on your own servers, private cloud, or on-premises infrastructure, without requiring external services to function. We support perpetual licensing options because software you deploy should remain an asset you can operate and control.
Open Source
We believe important security infrastructure benefits from being open to inspection, use, and improvement. ALTCHA’s open-source core and libraries are typically released under the permissive MIT License, giving developers the freedom to use and modify them without vendor lock-in.
Collaboration
Great security is built together. We value the developers, security researchers, organizations, and communities that use ALTCHA, challenge our assumptions, report issues, suggest improvements, and contribute to the project. We believe an open dialogue leads to better software — and a safer, more accessible web for everyone.
Talk to the people behind ALTCHA
Questions, feedback, ideas, or collaboration? Get in touch.