Email & comms

Postmark

High-performance transactional email service focused on deliverability and diagnostics.

Overview

Postmark specializes in transactional email with a strong focus on inbox placement, security, and detailed diagnostic tools to troubleshoot delivery issues. It offers a robust API and SDKs for most major languages.

Best for

Apps requiring high deliverability guarantees
Debugging email delivery issues
Enterprise-grade transactional flows

Trade-offs

vs Resend

Postmark has superior diagnostics and stability; Resend has a more modern developer experience.

vs Amazon SES

Postmark is easier to manage and use; SES is significantly cheaper for volume.

What XeroHack pre-wires

When you pick Postmark in the interview, the engine emits these files into your scaffold:

JSON API SDKs
Template Manager
Message Streams

Coupon

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