Report card

Do AI agents pick Mailgun?

How often agents choose Mailgun when a developer needs transactional email — measured across Claude, GPT, Gemini.

Mailgun

0%Pick Rate
95% CI 0%–2%

When developers ask an AI agent for transactional email, Mailgun is picked 0% of the time — ranking #5 of 5 measured across Claude, GPT, Gemini.

Picked 0% Named, not picked 58% Never surfaced 42%

Beaten by Postmark (14%), Resend (12%), SendGrid (9%), Amazon SES (0%).

Awareness

1.0M package downloads / week

Known but not preferred — widely used, but agents pick competitors. That's a preference problem, not awareness.

3 docs in FineWeb (10BT sample) · 449 URLs in Common Crawl

Present in the raw crawl and the filtered corpus models train on — solid corpus footprint.

AdoptionDid the pick convert to installs? Public Adoption = npm downloads of your packages. The proof half of the funnel.

4.1M installs / month ▼ 3% MoM

Installs are roughly flat month over month.

Get the full report

The per-model and per-surface breakdown for Mailgun — where it wins, where it loses, and to whom — plus an alert when the Pick Rate moves.

About Mailgun

Email delivery service with an API for sending, receiving, and tracking transactional email.

Mailgun is an email delivery platform aimed at developers and applications that need to send transactional email programmatically. It exposes an HTTP API for sending messages, managing domains, handling inbound email, and tracking delivery events. Both US and EU infrastructure are supported.

Where to start

Sign up for a Mailgun account to get an API key, then use the official JavaScript SDK (mailgun.js) or make direct HTTP requests to the Mailgun API to start sending email from your application.

Install

Website npm

Links and summary verified from public sources.

The rest of the Transactional Email ranking

1	Postmark	14%
2	Resend	12%
3	SendGrid	9%
4	Amazon SES	0%

← Full Transactional Email leaderboard · How this is measured