SPS Commerce and Wholesail solve completely different problems. SPS Commerce exists because Walmart, Target, Home Depot, and other large retailers require their suppliers to transmit purchase orders, invoices, and shipping notifications in EDI format. Wholesail exists because wholesale distributors need their accounts to place orders through a modern web portal instead of by phone and email.
Who Actually Needs SPS Commerce
You need SPS Commerce if your customers include large retailers or grocery chains that mandate EDI as a condition of doing business. These retailers will communicate this requirement explicitly — your vendor compliance guide will specify the EDI transaction sets required. You're a manufacturer or large distributor supplying retail chains, not a distributor whose customers are independent businesses like restaurants or contractors that don't use EDI.
The Wholesale Distributor's Situation Is Different
Most wholesale distributors serving restaurants, independent retailers, or contractors don't have EDI-mandating customers. Your accounts are small-to-mid businesses that order by phone, email, or text. The operational problem is not transaction format compliance — it's the manual effort of taking orders over the phone, building invoices manually, following up on overdue Net-30 accounts, and having no visibility into lapsing accounts. That's what Wholesail addresses.
The Diagnostic Question
Ask yourself: do any of my customers send me purchase orders in EDI format, or require me to send EDI invoices and ship notices? If yes, you need SPS Commerce or equivalent. If no — if your accounts call, email, or text their orders — you don't need EDI. You need Wholesail.