As it would be an internal, non-commercial website that would be used for testing purposes, you are free to use the community edition.
Should this website be a public website, a supporting website for profit generation or one that advertises a commercial product, you would need to obtain a license.
If you need further assistance, please do not hesitate to get back to us at your convenience!
Grisha 'Greg' Karanikolov
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items