Building an AI app for one business is easy. Building it for many businesses at once is a different job.
My ordering platform is live and runs many shops on one system. Each shop has its own menu, orders and customers, and no shop can ever see another shop's data.
That separation is built into the database from day one, not added later.
If you are building a SaaS for more than one customer, get this right first. I can help you do it.