Index / tool

Postmark

Category: Developer Tools
Rank: No. 607Tools index
Listed in: #2 Add email and messaging
Pricing: Paid
Type: TOOL
Builder: @postmarkapp
Date: Indexed Aug 3, 2026

About

Reliable transactional email. Transactional email service known for fast delivery and high inbox placement. Separate streams for transactional and broadcast.

What it does

According to its homepage, Postmark provides an API and SMTP service for sending password reset messages, notifications, and other transactional email, offering libraries for many programming languages and keeping promotional messages on a separate parallel sending infrastructure from transactional traffic.

Stated on the product site

Interfaces offered: API and SMTP service
Transactional vs promotional routing: Separate parallel sending infrastructure for promotional versus transactional mail
Client libraries: Libraries across multiple programming languages
Trial access: Free trial, no credit card required

Not stated on the site

The page doesn't show specific pricing tiers or per-email costs.
The page doesn't show data retention or privacy policy details.
The page doesn't show uptime or deliverability SLA commitments.

Written from the product site at postmarkapp.com.

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