Email delivery service for sending transactional and marketing emails via API or SMTP.
Postmark is a hosted email delivery service for developers and companies that need transactional and marketing email to reach the inbox. It offers an email API and SMTP service, message streams that separate transactional from bulk mail, email templates, inbound email processing, and analytics with retention. Libraries exist for most programming languages, so it fits into existing application stacks. It is aimed at development teams, agencies, startups, and enterprises. A free trial is available, and paid plans are sold as subscriptions.
Free
$15/mo
$16.50/mo
$18/mo
Prices in USD, as shown by postmarkapp.com. Source: pricing page. Last checked October 30, 2026.
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I want to decide whether Postmark (postmarkapp.com) is the right tool and which plan to pick. Below is what the StableMRR pricing directory read from Postmark's own pricing page (last checked 2026-10-30). It can be out of date, so treat it as a starting point. Category: Developer tools / API tools What it does: Email delivery service for sending transactional and marketing emails via API or SMTP. Plans: - Free: Free. Limits: Emails per month 100, Servers Up to 10, Custom sending domains Up to 10, Users Up to 6, Data retention 45 days. Includes: REST API, SMTP, Transactional email, Unlimited daily email limit, Up to 10 servers - Basic: $15/mo. Limits: Emails per month 10,000, Extra emails $1.80 per 1,000, Servers Up to 5, Custom sending domains Up to 5, Users Up to 4, Data retention 45 days. Includes: REST API, SMTP, Transactional email, Unlimited daily email limit, Up to 5 servers - Pro: $16.50/mo. Limits: Emails per month 10,000, Extra emails $1.30 per 1,000, Servers Up to 10, Custom sending domains Up to 10, Users Up to 6, Data retention 45 days default, customizable up to 365 days. Includes: REST API, SMTP, Transactional email, Unlimited daily email limit, Up to 10 servers - Platform: $18/mo. Limits: Emails per month 10,000, Extra emails $1.20 per 1,000, Servers Unlimited, Custom sending domains Unlimited, Users Unlimited, Data retention 45 days default, customizable up to 365 days. Includes: REST API, SMTP, Transactional email, Unlimited daily email limit, Unlimited servers Alternatives in the directory: 1DevTool, 1Lookup, 0x, 100ms Pricing page: https://postmarkapp.com/pricing Directory listing: https://stablemrr.com/p/postmarkapp-com First ask me three short questions about my team size, budget and what I need it for. Then recommend one plan, tell me what could make it a bad fit, and compare it with the alternatives. Finish with what I should check on the vendor's site before I pay.
No price changes recorded since we started tracking on October 30, 2026.
| Product | Category | Free plan | Paid from | Plans | Checked |
|---|---|---|---|---|---|
| 1DevToolDesktop workspace that runs multiple AI coding agents side by side with a browser, database, HTTP client and git. | API tools | Yes | - | 4 | Oct 29, 2026 |
| 1LookupAPI platform offering phone, email, IP and social data lookups for developers and AI agents. | API tools | No | $99/mo | 5 | Oct 29, 2026 |
| 0xDeveloper APIs for embedding crypto token swaps, cross-chain bridging and gasless transactions into apps. | API tools | No | $1,000/mo | 2 | Oct 29, 2026 |
| 100msLive video and audio infrastructure with SDKs and APIs for adding real-time calls and streaming to apps. | API tools | Yes | - | 3 | Oct 29, 2026 |
| 16x PromptDesktop tool that builds structured prompts from source code context for AI coding assistants. | API tools | Yes | - | 3 | Oct 30, 2026 |
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How this page was made. Plans and prices are read automatically from postmarkapp.com's public pricing page, checked against the page text, and re-checked about every week. Method. Something wrong? Tell us.
