Email API built for developers — React-Email, deliverability-first, polished DX
Resend is the youngest player in transactional email and has rapidly become the developer-first choice. Built around React Email (a React-based templating system), with a deliverability story that outperforms most legacy email APIs at small-to-mid scale. Founded by ex-Vercel team, ships with the kind of DX that maps cleanly to modern web stacks. Free tier covers 3,000 emails/month — enough for many production apps. The trade-off: smaller deliverability team than SendGrid or Postmark means edge cases (high-volume spikes, sender-reputation rebuilds after a deliverability incident) take longer to resolve.
Migrated from SendGrid in 2 days. Deliverability went UP.
Our SendGrid sender reputation had degraded. Switched to Resend in two days using React Email for templates. Within a week our open rates were back where they should be. The DX is genuinely a generation ahead.
React Email replaced our entire MJML pipeline.
We had 40 MJML email templates. Migrating to React Email took a week. Now every dev who can write JSX can edit emails. PMs preview in Storybook. The win compounds.
Above 1M/mo the SendGrid pricing wins. We dual-route.
We send 3M emails/month. Resend handles all customer-facing email (better templates, better DX). SendGrid handles transactional bulk (better volume pricing). Best of both.
Methodology
Every review on this page is verified through GitHub OAuth and weighted by reviewer credibility, use-case match, and conflict-of-interest disclosure. Aggregate scores combine with recency decay so rankings reflect current reality. Read full methodology →
