Email for software companies, without the enterprise campaign builder.
Paid
6 votes
About Resend
Resend is a service for building, testing and sending email from an application. It covers transactional messages, the ones triggered by something a user does, and marketing campaigns, which it calls Broadcasts. It is built for developers: sending anything at all requires a Resend API key and a domain you have verified yourself.
The free plan covers 3,000 emails a month across three verified domains, along with 10,000 automation runs. Pro is $20 a month for 50,000 emails and ten domains. Scale is $90 a month for 100,000 emails and up to a thousand domains. Emails past the allowance cost $0.90 per thousand on Pro and Scale, and automation runs past the free allowance cost $0.0015 each. Scale customers sending more than 3,000 emails a day can add a dedicated IP for $30 a month. Enterprise terms are set to fit.
Most of what the dashboard does is also reachable through the API. Broadcasts can be created and sent in one request, and cancelled again while scheduled or queued. Webhooks can be created, retrieved, listed and deleted programmatically, and every email webhook and GET email endpoint returns the Message-ID. Contacts import from a single CSV upload running to millions of rows. Suppressed addresses are managed from the dashboard or the API, request logs are available from anywhere, and sending statistics break down in more detail. API keys carry separate permissions, and a key exposed in public code is detected, revoked and reported to the team automatically. There is a CLI for the terminal, SDKs for several languages including an official PHP one, and support for custom headers.
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The template side deals with the awkward parts of email HTML. The code editor flags pasted markup that email clients will not render correctly. Templates can be organised into folders, charts can be embedded in a message, links can be turned into rich Open Graph previews, and AI prompts can reference existing content across broadcasts, templates and automations.
Resend runs a hosted MCP server with OAuth built in, supporting OAuth 2.1 with PKCE, Client ID Metadata documents, an official HTTP transport and the Agent Plugins Standard. It connects to Claude in one click from the connector directory, and the MCP server and Resend skills install from the Codex plugin marketplace. Auth0 transactional email can be routed through it with an official integration, and sign-up works from inside Vercel or the Vercel CLI. A domain in use by another Resend team can be verified and transferred. The project began as open source in 2022, joined Y Combinator's winter 2023 batch and launched the sending platform that year.
Key features
- Sends transactional email and marketing campaigns from one API.
- Requires a verified domain of your own and an API key before sending.
- Sets different permissions on each API key.
- Detects exposed API keys, revokes them and reports them to the team automatically.
- Creates, retrieves, lists and deletes webhooks programmatically, with a Message-ID on every email webhook.
- Manages suppressed addresses from both the dashboard and the API.
- Cancels scheduled or queued broadcasts through the API.
- Imports millions of contacts from a single CSV upload through the API.
- Warns in the code editor when pasted HTML will not work in email clients.
- Organises email templates into folders.
- Sets your own headers on outgoing email.
- Manages email from the terminal with a CLI and reads API request logs from anywhere.
- Hosts an MCP server with OAuth built in, supporting OAuth 2.1 with PKCE and the stateless protocol.
- Sends Auth0 transactional email through an official integration.
- Signs up from inside Vercel or the Vercel CLI.
- Verifies and transfers a domain already in use by another Resend team.
- Includes 3,000 emails a month, 3 domains and 10,000 automation runs on the free plan.
- Charges $0.90 per 1,000 emails above the Pro and Scale allowances.
What people use it for
Key facts
| Category | Marketing |
|---|---|
| Pricing | Freemium |
| Free tier | Yes |
| Upvotes | 6 |
| Listed | 22 August 2026 |
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