SMTP Pricing

SMTP pricing starts at $25/mo for the Essential plan; paid plans up to $500/mo. Billed monthly.

SMTP's cheapest business-usable plan is Essential at $25/mo. Lowest priced tier that provides email volume suitable for small businesses..

SMTP does not advertise a free tier on its public pricing page as of 2026-05-06. A free trial may be available on request.

Yes — SMTP's purchase motion is self-serve. A checkout URL is published on the pricing page. No demo is required.

Yes — SMTP's API documentation is publicly accessible. An AI agent or developer can inspect the integration surface without authentication.

xpay scored SMTP as agent-ready: every advertised plan is self-serve with public pricing. SMTP publishes a pricing page with 2 discoverable plan tier(s). Self-serve signup appears available without a sales call. A public API is advertised on the listing — Tier 2 will confirm docs are open. Tier 1 scorecard from public listing signals; pricing-page verification is a Tier 2 task. For the full purchase simulation see the linked Agent-Ready Index scorecard.

In the Transactional Email category, xpay's Agent-Ready Index lists alternatives ranked by their ability to support AI agent purchase. Visit the agent-readiness scorecard for SMTP to compare with 3 nearest peers.