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Mailgun vs Nylas

Nylas scores higher on the AgentReady, 69/100 against 58/100. They differ on 7 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.

Nylas. Nylas provides a data layer for communication workflows, offering APIs for email, calendar, and meeting data with unified access across multiple providers.

Where Mailgun is ahead

Mailgun passes agent-compatible signup flow, and Nylas does not. That is adopt, whether an agent can get a key and make its first successful call without a human in the loop.

Where Nylas is ahead

Nylas 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: structured api reference. Mailgun misses it.

And on adopt, cli available. Mailgun misses it.

Finally, on operate, retry behavior documented. Mailgun misses it.

What neither does

Both fail openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented, no mandatory sales call, programmatic credential creation, structured, predictable output, machine-readable errors, 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. Nylas leads 100 to 73. Mailgun misses public docs discoverable, llms.txt published, llms-full.txt / full agent docs; Nylas misses nothing.

Understand. Nylas leads 46 to 31. Mailgun misses structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Nylas misses openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented.

Adopt. Mailgun leads 75 to 70. Mailgun misses no mandatory sales call, programmatic credential creation, cli available; Nylas misses no mandatory sales call, agent-compatible signup flow, programmatic credential creation.

Operate. Nylas leads 61 to 53. Mailgun misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable; Nylas misses structured, predictable output, machine-readable errors, idempotency support, rate-limit behavior predictable.

Pricing

Mailgun does not publish a machine-readable starting price and has a free tier. Nylas starts at $0/month and has a free tier.

Signal by signal

Which to pick

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

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