Choose your isolation model
Shared schema with row-level security is efficient for most products; dedicated databases suit regulated customers. Decide early and document the trade-offs.
Meter everything
Usage-based pricing demands accurate, idempotent event capture. We stream metered events to a ledger and reconcile them before invoicing.
Design for noisy neighbors
Per-tenant rate limits and queues prevent one customer’s spike from degrading everyone else’s experience.