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Mailgun vs Mailtrap

Mailtrap scores higher on the AgentReady, 66/100 against 58/100. They differ on 6 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Mailgun. Transactional Email Delivery Service & API for Developers.

Mailtrap. Modern Email Delivery for developer & product teams.

Where Mailgun is ahead

Mailgun passes authentication documented, and Mailtrap does not. That is understand, whether an agent can read the docs and work out how the API behaves before calling it.

Where Mailtrap is ahead

Mailtrap passes public docs discoverable, llms.txt published and llms-full.txt / full agent docs, and Mailgun does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds understand: limits / constraints documented. Mailgun misses it.

And on adopt, cli available. Mailgun misses it.

What neither does

Both fail structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, no mandatory sales call, programmatic credential creation, structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable. If your agent needs any of those, you will be building it yourself either way.

Score, pillar by pillar

The AgentReady splits into four pillars, scored separately, because a product can be easy to find and still impossible to adopt.

Discover is whether an agent can find the product at all without being told it exists. Mailtrap leads 100 to 73. Mailgun misses public docs discoverable, llms.txt published, llms-full.txt / full agent docs; Mailtrap misses nothing.

Understand. Both sit at 31/100 here. Mailgun misses structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Mailtrap misses structured api reference, openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented.

Adopt. Mailtrap leads 80 to 75. Mailgun misses no mandatory sales call, programmatic credential creation, cli available; Mailtrap misses no mandatory sales call, programmatic credential creation.

Operate. Both sit at 53/100 here. Mailgun misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable; Mailtrap misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable.

Pricing

Mailgun does not publish a machine-readable starting price and has a free tier. Mailtrap starts at $15/mo and has a free tier.

Signal by signal

Which to pick

Mailtrap clears more of the signals an agent needs, so it is the safer default for unattended use. Full profiles: Mailgun and Mailtrap. Alternatives to each: Mailgun, Mailtrap.

An agent can fetch this as data: POST /v1/compare {"slugs": ["mailgun", "mailtrap"]}