Resend and React Email for transactional email

Resend is a transactional email API for developers. Templates can be written as React components with React Email, and sending is a single API call. Domain authentication is part of setup, but verify that the DNS records resolve before production traffic.

For receipts, password resets and notifications on a React or Next.js stack, that model is hard to beat. Resend's broadcast features are newer than its transactional API, so teams often pair it with a separate tool for marketing and lifecycle email.

Common pairings are Loops for SaaS lifecycle email, or an AI-native tool such as Brew when the bottleneck is producing on-brand campaigns. Running two tools adds cost and a second set of suppression lists, so weigh that against the clean separation.