To run the Keepit Google Workspace (G Suite) backup you can have any of the Google Workspace editions - Basic, Business, or Enterprise. You must use an administrator account with access to data across all accounts to configure the backup. Please also make sure that API access is enabled in this account. To enable API, please see the following instructions: https://support.google.com/a/answer/60757?hl=en
It is also necessary to have the Keepit app installed in Google, which can be done through the Google Workspace Marketplace.