API info:

Welcome

Affiliates available via third-party add ons such as Rewardful:

How to integrate Rewardful (affiliate functionality)

Online community features available via Circle or Muut integrations:

Can I set up a private forum or community?

Info on setting up an online course with MemberSpace:

How to Create an Online Course with MemberSpace

Payment plan info:

Can my members have more than one recurring subscription?

Upsell info:

How to create upsells for members

Only differences between the Startup and Professional plans are as follows:

MemberSpace Pricing