Memberium works with all the Infusionsoft/Keap plans that offer API integration. Memberium uses Infusionsoft’s Legacy API system to connect to the CRM to pull in your data such as tags, contact records, billing information, etc.
The only plan that we know doesn’t work is the Keap Grow plan. This plan, according to our customers and Infusionsoft support, does not offer the ability to retrieve an API key or passphrase.
Due to this, you’ll need to upgrade to at least the Keap Pro plan or get the Infusionsoft version.