Terms of Service

zerohop.dev provides interactive simulators, a correlation engine, and katas for learning how network protocols and systems work. The service is provided on an “as is” and “as available” basis, without warranties of any kind. We work hard on accuracy but do not guarantee the service will be uninterrupted or error-free.

• Paid plans are billed annually.
• You can cancel anytime from your billing portal; cancellation stops the next renewal and you keep access until the end of the period you've paid for.
• Payments and tax are handled by Lemon Squeezy, our Merchant of Record. Their terms apply to the transaction itself.

You agree not to:

• share, resell, or redistribute paid content or your account access;
• attempt to scrape, reverse-engineer, or extract the correlation engine or other non-public parts of the service;
• disrupt or abuse the service, or use it to break the law.

zerohop.dev is a learning aid. Its simulations are validated against real open-source reference implementations, but they are teaching models — not a substitute for the actual systems, vendor documentation, or professional engineering judgment. Do not rely on it as the sole basis for production decisions.

We may update these terms; material changes will be reflected in the “last updated” date above. Questions? Email [email protected].