Resend
Resend provides email delivery infrastructure for transactional and marketing messages.
About Resend
Resend is an email delivery service for developers. It is used to send transactional and marketing emails, and it provides an API with SDKs for several programming languages, along with SMTP and REST options for sending.
The homepage describes a test mode that simulates events and API calls without sending real emails, and webhooks that report delivery, open, bounce, click, and complaint events. It also includes a visual email editor, contact management, and broadcast analytics. The homepage does not state pricing, usage limits, or geographic restrictions.
Key features
- Send transactional and marketing emails through an API
- SDKs for Node.js, Python, Ruby, PHP, Go, Rust, Java, Elixir, and .NET
- Test mode that simulates events without sending real emails
- Webhooks for delivered, opened, bounced, clicked, and complained events
- Email templates built with react-email, an open source component library
- Contact management with list import and per-contact attributes
Best for: Developers and engineering teams who want to send transactional and marketing email from their own code.
Good for
- Test mode allows API experiments without sending real emails to real people
- Offers SDKs for many languages, plus SMTP and REST options
- Email templates are built with react-email, which is open source
Resend at a glance
- Website
- resend.com
- Category
- Development › APIs & Databases
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Good for
- Developers
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Resend FAQ
Can I test the API without sending real emails?
Yes. Test mode lets you simulate events and experiment with the API without sending real emails to real people.
Which programming languages have SDKs?
The homepage lists SDKs for Node.js, Serverless, Ruby, Python, PHP, Go, Rust, Java, Elixir, and .NET, and also lists a CLI, REST, and SMTP as integration options.
How are email delivery events reported?
Modular webhooks send real-time notifications to your server when an email is delivered, opened, bounced, or has a link clicked. The homepage also lists complaints as an event type.
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