What's the difference between Magento Open Source and Adobe Commerce for B2B?

Magento Open Source is the free version, it ships with the core e-commerce engine but does not include the B2B module. To run B2B on Open Source you must build the B2B features yourself (custom companies, quote workflow, customer-specific pricing). That is doable but expensive, you’re reinventing what Adobe ships out-of-the-box.

Adobe Commerce (the paid edition, formerly Magento Enterprise) ships the official B2B module at no extra cost: companies + roles + permissions, request-for-quote workflow, requisition lists, shared catalogues, multi-tier pricing, and credit limits / payment-on-account. For 95% of B2B stores, Adobe Commerce + B2B module is the right starting point. Annual licence runs from ~$22,000 USD/year and scales with GMV.