Resend - Transactional Email API for Developers

Email for developers that actually gets delivered

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Updated Jul 2026 · Added Jul 2026

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What is Resend?

Resend is an email platform built for developers to send transactional and marketing emails at scale. It provides a simple, elegant API that integrates directly into your code with SDKs for Node.js, Python, Ruby, PHP, Go, Rust, Java, Elixir, .NET, and more. Designed by engineers for engineers, it eliminates spam folder issues and delivers emails reliably with real-time webhooks, test mode, and comprehensive analytics.

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Key Features of Resend

Multi-language SDK support (Node.js, Python, Ruby, PHP, Go, Rust, Java, Elixir, .NET, REST, SMTP)
Framework integrations (Next.js, Remix, Nuxt, Express, Hono, Redwood, Bun, Astro)
Test mode for safe experimentation
Modular webhooks for real-time notifications
Visual email editor with custom styles
Contact management and import
Broadcast analytics and reporting
Transactional and marketing email support

Who Should Use Resend?

Send transactional emails from web applications

Deliver marketing campaigns at scale

Manage subscriber lists and contacts

Track email delivery, opens, clicks, and bounces

Integrate email into serverless applications

Test email workflows before production

Resend: Pros & Cons

✓Pros

Developer-friendly API with intuitive syntax
Fast integration into existing code
Comprehensive SDK coverage across languages
Real-time webhook notifications
Built-in test mode to prevent accidental sends
Modern visual email editor
Reliable delivery avoiding spam folders

Frequently Asked Questions about Resend

Which SDKs and programming languages does Resend support?

Resend provides official SDKs for Node.js, Python, Ruby, PHP, Go, Rust, Java, Elixir, and .NET, plus REST and SMTP support for anything else. It also includes framework integrations for Next.js, Remix, Nuxt, Express, Hono, Redwood, Bun, and Astro, so you can drop it into most modern stacks without much setup work.

Can I test emails without actually sending them to real addresses?

Yes, Resend includes a test mode built into the platform so you can validate your email workflows and content before they reach production inboxes. This lets you catch issues safely without burning through your send quota or accidentally mailing customers half-finished campaigns.

Does Resend track opens, clicks, and bounces?

Resend provides broadcast analytics and reporting that cover delivery, opens, clicks, and bounces, along with real-time webhook notifications so you can act on those events as they happen. The webhooks are modular, so you only subscribe to the notifications you need.

Can I manage subscriber lists and contacts in Resend?

Resend includes contact management and import capabilities to build and maintain your subscriber lists directly within the platform. You can then use these contacts for both transactional and marketing email campaigns.