From the website.
```
Yes. Unleash Open Source is free, self-hosted, and has no limit on seats. It covers the core feature set, with a limit of 1 project, 2 environments, and 5,000 feature flags per instance. Thousands of teams run it in production.
It does not include single sign-on, SCIM provisioning, granular role-based access control, change request approvals...
```
1 project, 2 environments. Laughable.