For a simple Node/Express backend flow, use managed SMS 2FA for login only when your app can poll delivery status, handle retries, and own fallback policy; choose a real-time communications orchestrator when those decisions must span several channels immediately. Short answer: for a simple Node/...
Source: [Dev.to](https://dev.to/wadesterling3125/buy-or-build-a-backend-flow-to-poll-sms-2fa-login-delivery-status-in-nodeexpress-2kb2)