Here is a quick overview of the difference between each of the plan subscriptions:
Discover: You can have only one website
Experiment: You can have up to 2 websites, and GIT access
Build: You can have up to 4 websites, GIT access, and you have the white label mobile app
Scale: You can have up to 6 websites, GIT access, and the white label mobile app
Here is a link to the Thrinacia Atlas Pricing Page