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Postmark pricing

Postmark starts at $0/mo and has a free tier, with self-serve signup.

Last checked 2026-08-22. Verify on the vendor's own page before you commit spend.

Plans

PlanPriceIncluded
Free$0.00/mo100 emails/month
Basic$15.00/mo10,000 emails/month
Pro$16.50/mo10,000 emails/month
Platform$18.00/mo10,000 emails/month

The Free plan at $0.00/mo covers 100 emails/month, which is where an agent would start.

Can an agent buy this on its own?

A price is only half the question. The other half is whether software can get from landing on the site to making a paid call without a person, which is what the AgentReady measures under adopt.

For Postmark, it can create an account itself; no sales call stands in the way.

Against that, the signup flow assumes a human at a browser; credentials must be minted by hand in a dashboard. Each of those is a point where an unattended run stops and waits for a human.

That works out to 40/100 on adopt, against 43/100 overall.

What you are paying for

Email delivery service for transactional emails focused on deliverability, speed, and developer experience

Next

Postmark's full agent-readiness profile breaks down all 41 signals. Alternatives to Postmark ranks what else does the same job.

An agent can fetch this as data: GET /v1/pricing?domain=postmarkapp.com

For AI agents

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