Postmark
The email delivery service that people actually like
Postmark is an email delivery service that handles transactional and marketing emails through an API or SMTP. It addresses the challenge of ensuring time-sensitive emails—such as password resets, order confirmations, and notifications—reach recipients’ inboxes quickly and reliably, rather than being filtered as spam or delayed.
The service offers an Email API, SMTP Service, and a Bulk API for high-volume sends. Features include Message Streams to separate transactional and promotional email, email templates, inbound email processing, analytics and retention, and webhooks. Integrations are available with platforms such as Zapier, Customer.io, ActiveCampaign, Supabase, Craft CMS, WordPress plugins, and Stripe. Postmark supports official libraries for multiple programming languages, including Ruby, Python, PHP, .NET, and Node.js.
Postmark is designed for agencies, enterprises, startups, bootstrapped businesses, and side projects. A free trial is available to get started. The service is seat-based and usage-based, with pricing determined by the volume of emails sent.
12 alternatives to Postmark
Ranked by how well each tool replaces Postmark: shared features, audience, price and popularity.
An email and marketing automation platform for growing businesses.
Covers 3 of 15 key features.
Free plan67 out of 100 matchFree- 67 out of 100 match$15/mo
Transactional email API and SMTP service for sending, receiving, tracking, validating, and
Covers 4 of 15 key features.
Free plan66 out of 100 match$15/moAn email platform for developers to send transactional mail.
Covers 6 of 15 key features.
Free plan65 out of 100 matchContact sales- 65 out of 100 match$25/mo
Team-friendly email API for modern apps
Covers 3 of 15 key features and starts cheaper.
Free plan63 out of 100 match$7/moEmail delivery platform for transactional and marketing email.
Covers 6 of 15 key features and starts cheaper.
Free plan62 out of 100 match$5/moSMTP relay and email API for transactional and marketing email
Covers 2 of 15 key features and starts cheaper.
Free plan62 out of 100 match$10/moProfessional SMTP service for transactional and newsletter email delivery
Covers 2 of 15 key features.
Free plan62 out of 100 match$14.95/mo- 61 out of 100 match—
Email API for developers: send and receive email from your app or agent
Covers 4 of 15 key features.
Free plan61 out of 100 match$15/moThe customer messaging platform for humans and AI agents.
Covers 6 of 15 key features.
Free plan60 out of 100 matchUsage-based