A Standard Account is: Completely cost-free account  Transact with one or several customers, by receiving interactive documents via email sent by buyers (e.g. Purchase Orders) Interactive documents redirect you to Ariba’s logging page, to create and submit digital documents to your buyer customers

An Enterprise Account is: Full-feature account that is created prior to receiving documents from buyers Organize and filter documents in an easy manner Set-up an automatic integration (interface between your ERP and your Ariba Network Account) Subjected to fees depending on the volumes transacted with all buyer customers connected to this account

There is no functional difference between Enterprise and Standard accounts for suppliers using SAP Ariba only to participate in Sourcing events (live bids, auctions, RFPs, etc.) / Supplier Registration & Supplier Performance.