A comparison table is available at https://www.simplifyit.com.sg/?page_id=522
Generally the cheaper subscription plans like Exchange Online Plan 1 & 2, Microsoft 365 Business Basic and Office 365 E1 licenses do not come with desktop applications but have Exchange mailboxes provided.
Users may be able to read/edit/create documents online at Office 365 portal for Microsoft 365 Business Basic and Office 365 E1 licenses.
