Resend

The email API for developers — send transactional and marketing email that reaches inboxes, not spam folders.

What is Resend?

Resend is an email platform built for developers who want sending email to feel like using a modern API product. You integrate with a few lines of code using official SDKs for Node.js, Python, Ruby, Go, PHP, and more, and build templates in React with the open-source React Email library that the same team maintains. Resend focuses heavily on deliverability — domain authentication with SPF, DKIM, and DMARC guidance, a clean sending infrastructure, and detailed logs, webhooks, and analytics for every message. Beyond transactional email like password resets and receipts, Resend also supports marketing broadcasts and audience management, so a product team can run both kinds of email from one place. A free tier of 3,000 emails per month makes it easy to start small and scale up.

Key Features

Simple REST API with SDKs for Node.js, Python, Ruby, Go, PHP, and Java

Build email templates in React with the open-source React Email library

Deliverability tooling: domain authentication, dedicated IPs, and spam-folder avoidance

Webhooks, logs, and analytics for delivery, opens, clicks, and bounces

Broadcasts and audiences for marketing email alongside transactional sending

Use Cases

Sending transactional email like sign-up confirmations, receipts, and password resets
Building branded email templates in React instead of legacy HTML tables
Running product-update newsletters and marketing broadcasts
Monitoring deliverability with logs and webhooks in production apps

How to Use Resend

1Create an account and verify your sending domain (SPF and DKIM records)
2Grab an API key and install the SDK for your language
3Design templates with React Email or plain HTML
4Send via the API and track results in logs, webhooks, and analytics

Best For

Developers integrating email into SaaS productsStartups replacing SendGrid or Mailgun with a modern stackTeams that build their frontends in React

FAQ

Does Resend have a free plan?

Yes. The free tier includes 3,000 emails per month with 1 custom domain, which is enough for many side projects and early-stage products. Paid plans start at $20/month.

What is React Email?

React Email is an open-source library from the Resend team for building email templates with React components, which Resend can render and send directly.

Can Resend send marketing email too?

Yes. Besides the transactional API, Resend offers Broadcasts and Audiences for newsletters and announcements, with segmentation and unsubscribe handling built in.

How does Resend compare to SendGrid?

Resend trades SendGrid's breadth for a cleaner, developer-first experience: simpler API, React-based templates, and modern dashboards, while SendGrid offers longer-established infrastructure and broader enterprise features.

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