Do AI agents pick Resend?
How often agents choose Resend when a developer needs transactional email — measured across Claude, GPT, Gemini.
95% CI 8%–17%
When developers ask an AI agent for transactional email, Resend is picked 12% of the time — ranking #2 of 5 measured across Claude, GPT, Gemini.
7.5M package downloads / week
0 docs in FineWeb · 496 URLs in Common Crawl
28.9M installs / month ▲ 21% MoM
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The per-model and per-surface breakdown for Resend — where it wins, where it loses, and to whom — plus an alert when the Pick Rate moves.
About Resend
An email API for sending transactional email from your application.
Resend is a transactional email service built for developers. It lets you send emails via API using plain text, HTML, or React components as templates. You verify your sending domain through the Resend dashboard, then trigger emails from your backend code.
Where to start
Sign up for a Resend account to get an API key from the dashboard, then verify your sending domain. From there, install the Node.js SDK and make your first send call with a few lines of code.
The rest of the Transactional Email ranking
| 1 | Postmark | 14% |
| 3 | SendGrid | 9% |
| 4 | Amazon SES | 0% |
| 5 | Mailgun | 0% |