Short answer: for a gaming SaaS compliance notice, choose the SMS alerts API that gives you durable message state, delivery webhooks, and regional policy controls; the cheapest per-message quote is irrelevant if an accepted notification cannot be proved delivered. Put Node.js behind a small delivery ledger, keep retries idempotent, and make the audit record the product boundary.
The failure I plan for is quiet: the API accepts a request, the player changes carrier, and the compliance team later asks what happened. “The provider returned 202” is not an answer. I want a message ID, every provider event, the destination region, the template revision, and a timestamped final state. That is a reliability problem with a data model attached.
How should US/EU SaaS notices model delivery evidence and governance?
Start with an append-only ledger. The business table owns the notice; the delivery table owns attempts. Store a keyed hash of the destination rather than the raw number when the audit requirement permits it, and encrypt the number when support staff must search it. Keep the payload version and consent or legal basis reference beside the message, because reconstructing those from a mutable template repository is guesswork.
