Postmark vs Mailgun: Side-by-Side Comparison (2025)

Choosing between Postmark and Mailgun comes down to your specific use case. Postmark is built for developers who need fast, reliable transactional email, while Mailgun targets developers sending transactional and bulk email via API.

Quick Verdict

Overall winner
Postmark
Better pricing
Postmark
More features
Postmark
For beginners
Mailgun
E-commerce
Postmark

Feature Comparison

Feature Mailgun Postmark
๐Ÿ’ฐ Pricing
Free Planโœ“โœ—
Starting Price$15/mo$15/mo
Free Trialโœ“โœ“
โš™๏ธ Features
Email Automationโœ—โœ—
Visual Workflow Builderโœ—โœ—
Landing Pagesโœ—โœ—
Built-in CRMโœ—โœ—
SMS Marketingโœ—โœ—
A/B Testingโœ—โœ—
E-commerce Integrationโœ—โœ—
Transactional Emailโœ“โœ“
Remove Brandingโœ—โœ—
๐Ÿค– AI Features
AI Subject Linesโœ—โœ—
AI Send-Time Optimisationโœ—โœ—
๐Ÿ›Ž Support
Email Supportโœ“โœ“
Live Chatโœ—โœ—
Phone Supportโœ—โœ—
Mailgun
โ˜…โ˜…โ˜…โ˜…โ˜† 4.3/5
Postmark
โ˜…โ˜…โ˜…โ˜…โ˜† 4.6/5
Our verdict

Mailgun is best for developers sending transactional and bulk email via API.

Try Mailgun Free โ†’
Our verdict

Postmark is best for developers who need fast, reliable transactional email.

Try Postmark Free โ†’

Which Should You Choose?

Choose Mailgun ifโ€ฆ

  • You are primarily focused on developers who need fast, reliable transactional email
  • You value transactional email
  • You prefer paid pricing
Try Mailgun โ†’

Choose Postmark ifโ€ฆ

  • You are primarily focused on developers sending transactional and bulk email via API
  • You value email api
  • You prefer freemium pricing
Try Postmark โ†’

Frequently Asked Questions

Is Postmark better than Mailgun?

It depends on your use case. Postmark wins for developers who need fast, reliable transactional email, while Mailgun is stronger for developers sending transactional and bulk email via API.

Which is cheaper, Postmark or Mailgun?

Postmark starts at a lower price point. Pricing scales with subscriber count so total cost depends on your list size.

Can I switch from Mailgun to Postmark?

Yes, switching is possible. Most platforms support CSV import/export. Plan time to recreate automations and templates.