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Postmark

Postmark is a reliable email delivery service for developers to send transactional and marketing emails.

Developer ToolsFree trial
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About Postmark

Postmark provides a fast and reliable email delivery service designed primarily for developers who need to send transactional and marketing emails. Its key feature is the ability to ensure that emails reach the inbox on time, maintaining high deliverability rates. This service helps businesses focus on building great products rather than worrying about email delivery issues. Postmark distinguishes itself by routing promotional messages through a separate infrastructure to protect the deliverability of crucial transactional emails, which is crucial for maintaining reliable communications. It offers a straightforward API and SMTP service, enhancing its integration capabilities across various programming languages. Postmark targets a wide range of users, including startups, enterprises, and side projects, emphasizing simplicity and effectiveness in email communication.

What Postmark does

Email API
The Email API allows users to send transactional and marketing emails seamlessly through their applications.
SMTP service
Postmark provides an SMTP service to send emails easily without changing existing infrastructure.
Message Streams
Message Streams help to keep promotional and transactional emails separate to maintain optimal deliverability.
Analytics and retention
The platform offers detailed analytics and customizable data retention options for email data.
Email templates
Users can create and manage responsive email templates to enhance email outreach.
Inbound email processing
Postmark can convert inbound emails into JSON objects and deliver them to specified webhook URLs.

Who it’s for

Postmark is designed for developers, startups, and small businesses that need reliable email delivery services. It may not be suitable for very large enterprises looking for extensive customization or specialized features.

What it costs

Postmark offers a free Developer tier allowing 100 emails per month, which does not expire. Paid plans start at $15 per month for the Basic plan, with additional tiers priced at $16.50 and $18.00 per month.

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Details

Platform
Web
Pricing
Free trial
Best for
Developer Tools
Launched
9 Aug 2026

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