Resend

Email platform built specifically for developers.

Overview

Resend is an email platform built specifically for developers. It provides a modern API and SDKs for multiple languages (Node.js, Python, Ruby, PHP, Go, Rust, Java, Elixir, .NET) alongside a visual email editor and React-based email templating through react-email. The platform emphasizes developer experience with features like test mode, modular webhooks, and seamless integration into existing codebases.

The service handles both transactional and marketing emails at scale, with strong deliverability features including DKIM/SPF/DMARC authentication, BIMI support, managed dedicated IPs, multi-region sending, and proactive blocklist tracking. It includes contact management, broadcast analytics, and detailed email event tracking through webhooks.

Key features

RESTful API and SMTP relay
React Email component library
Test mode for safe experimentation
Webhook event tracking (delivery, opens, clicks, bounces)
Multi-region sending
Managed dedicated IPs
Contact management and broadcast analytics
DKIM/SPF/DMARC authentication
BIMI support
Blocklist monitoring

Pros

Developer-friendly API with SDKs for 10+ languages
React Email integration eliminates HTML table layouts
Strong deliverability infrastructure with multi-region support
Comprehensive webhook system for real-time events
Test mode prevents accidental production sends
Managed dedicated IPs with automatic warmup
Excellent customer testimonials from engineering teams

Cons

Pricing details for Pro and Scale plans not fully visible in evidence
Free plan limited to 100 emails/day
Data retention limited to 30 days on free/pro/scale plans

Use this if

You need a modern email API with excellent developer experience, want to build emails with React components, require strong deliverability guarantees, or need multi-region email sending capabilities.

Skip this if

You need unlimited free email sending, require longer data retention periods, or prefer traditional email service providers without code-first approaches.

Best for

Developers building transactional email flowsStartups sending marketing campaignsTeams needing reliable email deliverabilityReact-based applicationsMulti-region email distribution