Template approvals, opt-out handling, rate limits and CRM sync — the engineering details that decide whether a WhatsApp rollout survives month three.
WhatsApp is the highest-engagement channel most businesses have access to, and also the easiest to misuse. Template rejections, opt-out failures and duplicate sends are usually architecture problems, not marketing problems.
We model every outbound message as an event with an idempotency key, a consent check and a delivery receipt. Broadcasts become batched jobs with per-tenant rate budgets rather than loops over a contact list.
The final piece is CRM synchronisation: every conversation should land against a contact record so sales and support see one timeline.