Email API built for developers
Resend is a transactional email API for developers, built by the team behind React Email. Send onboarding emails, password resets, and notifications via a clean REST API. Free tier: 100 emails/day, 3,000/month. Supports custom domains, webhooks, and open/click tracking. Growing fast as the modern alternative to SendGrid.
Best for
Use when
You need to send transactional emails (welcome, password reset, notifications) from your app with clean developer tooling.
Skip when
You need a marketing email platform with campaign management and segmentation — use Brevo or Mailchimp for that.
Globally accessible. Requires domain verification (DKIM/SPF) for good deliverability.
Alternatives
Brevo, SendGrid, Postmark, Mailgun