Adobe Commerce as a Service is the SaaS end of Adobe's commerce range. Adobe runs the platform, applies the updates, scales it for your traffic and keeps it available. You stop owning servers entirely.
The trade is architectural. ACCS has no monolithic storefront — it exposes APIs and expects you to bring your own front end. So a move to ACCS is always two projects wearing one name: a platform migration, and a headless build.
Teams that treat it as one project discover the second half in month four.
Where ACCS makes sense: you want Adobe's platform without an infrastructure team, your traffic is spiky, you are already committed to a decoupled front end, or you want Commerce, Experience Manager and Assets working as one stack rather than three integrations.
Where Adobe Commerce Cloud still makes more sense: you have deep platform-level customisation that assumes a traditional storefront, or you need infrastructure control that a managed service will not give you.
We will tell you which of those you are in the first fortnight, and it is not a chargeable conversation.