Keygen: Open-Source Software Licensing

This project is source-available (Elastic License), not open source:<p>&gt; You may not move, change, disable, or circumvent the license key functionality in the software, and you may not remove or obscure any functionality in the software that is protected by the license key.

Took me a bit to realize it&#x27;s licensing as in managing enterprise license keys &#x27;C1B6DE-39A6E3...&#x27;, not licensing as in MIT&#x2F;GPL&#x2F;etc. <a href="https:&#x2F;&#x2F;keygen.sh&#x2F;" rel="nofollow">https:&#x2F;&#x2F;keygen.sh&#x2F;</a><p>Does anyone know a minimal, alternative licensing solution appropriate for a tiny startup? One where the license key is the only form of user authentication. Is there a cheap service available? Or is it easy to roll a custom solution.