Three tiers, one written scope. A tool does one job: a retrieval assistant over your documents, an integration between two systems, an internal dashboard. A product has accounts, its own data model, an admin and one AI feature. A platform serves several organisations at once, bills them, carries an evaluation harness for its models and runs inside your own cloud account.
What moves a build up a tier is not the number of screens; it is accounts, tenancy, billing and anything that has to be provably correct. We tell you which tier you are in before we start, and the number does not move unless the scope does.