There are two editions of LiteSpeed Web Server: Enterprise Edition and OpenLiteSpeed.

OpenLiteSpeed is open source. It is free to use, modify, and distribute through GPLv3 licensing. You can find download links and more information about OpenLiteSpeed at openlitespeed.org.

The Enterprise Edition is proprietary software and requires a license. Licenses (including the Free Starter license) can be purchased or leased in the Online Store. There you can find many different licenses to fit different server requirements.

Please see Choosing A License for more information on different licenses.