One software license is required per user.
SQL Server Comparison Tool is licensed on a per-user basis, each user who runs the program must have a license.

The Site License covers all users in a business entity or formal organization at a particular site.

The Enterprise License covers an unlimited number of sites/offices inside an Enterprise.

Full source code of SQL Server Comparison Tool - by buying the source code you purchase just that - the source code, not the brand or intellectual property rights for SQL Server Comparison Tool.

All licenses include free tech support for 1 year and 1 year of free upgrades.
The Site and Enterprise Licenses require one point of contact for technical support.