For Enterprises

ALTCHA is an ideal anti-spam solution for enterprises and government organizations requiring compliance with stringent regulations and security measures.

• Global Compliance – Meets data protection regulations worldwide, including GDPR, CCPA, HIPAA, CPPA, LGPD, DPDPA, and PIPL.
• Accessibility Compliance – Aligns with the European Accessibility Act (EAA).
• On-Premises Deployment – Ensures local data residency and full operational control without compromises.
• EU-Developed – Built in the European Union by a Czech-owned company.

What Is ALTCHA?

ALTCHA is a modern anti-spam solution that replaces outdated systems like reCAPTCHA, hCaptcha, and Cloudflare Turnstile. Unlike these alternatives, ALTCHA is designed for on-premises deployment, giving you complete control over data, security, and compliance — with no external dependencies or risk exposure.

For more information on features and use cases, see the ALTCHA Sentinel documentation.

Why Choose ALTCHA for Enterprise?

ALTCHA Sentinel is a self-hosted solution designed for enterprises that prioritize data protection, compliance, and operational reliability. Built for performance and transparency, ALTCHA offers a robust defense against spam and abuse without compromising control.

• 100% Data Ownership – By self-hosting ALTCHA Sentinel, organizations maintain full control over their data, ensuring compliance with internal policies and regulatory standards.
• Enterprise-Grade Performance – Engineered for high-availability deployments, ALTCHA supports unlimited verifications, delivering unmatched performance even under heavy traffic.
• Transparent and Auditable – With open-source components at its core, ALTCHA enables full code transparency and auditability—critical for organizations with strict security and compliance requirements.
• Reliable and Actively Maintained – Backed by responsive support and continuous development, ALTCHA evolves to meet the latest security challenges.
• Cost Efficiency at Scale – ALTCHA Sentinel’s licensing model and unlimited verifications reduce total cost of ownership, especially for high-volume deployments, making it a more economical choice compared to cloud-based alternatives.
• Trusted by Leading Organizations – ALTCHA is already in use by thousands of companies worldwide, including government agencies and large-scale enterprises.

Compliance & Legal Requirements

ALTCHA is built with privacy and compliance in mind. Our products help enterprises meet strict legal and regulatory obligations while maintaining high security and accessibility standards.

Learn more:

• Regulatory Compliance
• Security Compliance Framework
• Legal Considerations
• End User License Agreement (EULA)
• Support Policy

Licensing & Support

We provide enterprise-grade licensing and support with transparent pricing, ensuring reliable performance on your infrastructure.

See:

• Licensing Plans
• Support Plans

Technical Resources

The following documentation will help your engineering team evaluate ALTCHA’s architecture and integrate it smoothly with your existing systems.

General:

• Integration Guides
• Libraries and Plugins
• Migrate from reCAPTCHA
• Migrate from hCaptcha

ALTCHA Sentinel:

• Features
• Installation
• Benchmarks
• Clustering
• SSO Integration

Next Steps

We respect your preference for a streamlined onboarding experience. ALTCHA Sentinel is designed to help enterprises get started quickly with minimal friction. Our onboarding process includes clear documentation, self-service integration, and optional expert assistance to ensure a smooth deployment from day one.

With transparent, upfront pricing — no hidden fees or upsells — your organization can confidently evaluate and scale. Enterprise plans offer premium features and unlimited scalability to meet evolving needs.

Should you require support, our team is available to provide dedicated assistance and expert guidance throughout your onboarding and ongoing usage.

You can begin with a free 30-day trial to test and evaluate ALTCHA Sentinel in your environment.

When you’re ready to upgrade, purchase an Enterprise license at eu.altcha.org/license.

Automated billing supports monthly payments only. For biannual or annual billing — with 10% and 20% discounts respectively — please contact us. Biannual and annual billing is available via bank transfer to an EU-based account.

Costs

Unlike traditional anti-spam services, ALTCHA Sentinel offers unlimited verifications, providing predictable costs and eliminating surprise overage fees.

Below is a comparison of estimated monthly costs for handling 3 million verifications with enterprise-grade support:

Solution	Approximate Price / Month
reCAPTCHA	€3,500+
hCaptcha	€4,000+
ALTCHA Sentinel	€900+

With ALTCHA Sentinel, you pay a fixed license and support fee — not per verification.

Unlike reCAPTCHA and hCaptcha, which require continuous connectivity to external cloud services, ALTCHA Sentinel runs fully on your own infrastructure. This makes it uniquely suited for organizations demanding high availability, data residency, and full operational control.

Contact

For questions or a custom quote, contact us.

FAQ

For frequently asked questions, visit FAQ page.