for teams that want to know their users better
Absolutely. You can take your subscription fee back whenever you decide to, and we will not even ask why, unless you feel like telling us.
Yes. On the Starter plan you can create unlimited projects with different personas, but you cannot invite other people to collaborate on them.
Each team member gets an access level that matches their role in the project: view only, edit, or manage.
As your personas evolve, you can take a snapshot of their state at any point, so you can always go back to it later.