Postmark vs Mailgun: Which Should You Choose in 2026?
Choosing between Postmark and Mailgun comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.
By Toolradar Team · Last updated March 22, 2026 · Methodology
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Postmark
Transactional email service
Best for you if:
- 0
- • You need api tools features specifically
- • Transactional email service with sub-second delivery and strict sender vetting since 2010
- • Separates transactional and promotional email into distinct streams to protect inbox placement
Mailgun
Email API for developers
Best for you if:
- 0
- • You need email deliverability features specifically
- • Mailgun is an email API service for developers sending transactional email
- • It handles email delivery, validation, and tracking at scale
| At a Glance |  Postmark |  Mailgun |
|---|---|---|
Price | Free + Paid | Free + Paid |
Best For | API Tools | Email Deliverability |
Rating | — | — |
| Feature | Postmark | Mailgun |
|---|---|---|
| Pricing Model | Freemium | Freemium |
| Community Rating | No ratings yet | No ratings yet |
| Total Reviews | 0 | 0 |
| Community Upvotes | 0 | 0 |
| Categories | API ToolsEmail Deliverability | Email DeliverabilityEmail Verification |
How Postmark and Mailgun Compare
Postmark
Transactional email service
Free tier available
Mailgun
Email API for developers
Free tier available
Postmark is a api tools tool. Mailgun is in email deliverability.
Who Should Use What?
On a budget?
Both are freemium. Compare plans on their websites.
Go with: Postmark
Want the highest-rated option?
Neither has user reviews yet.
Go with: Postmark
Value user reviews?
Neither has user reviews yet.
Go with: Postmark
3 Questions to Help You Decide
What's your budget?
Both are freemium. Pricing won't help you decide here.
What's your use case?
Postmark is a api tools tool. Mailgun is in email deliverability. Pick the category that matches your needs.
How important are ratings?
Neither has user reviews yet.
Key Takeaways
Postmark
- 0
- Free tier available
- Our pick for this comparison
Mailgun
- Better fit for email deliverability
The Bottom Line
Postmark is our pick.
Frequently Asked Questions
Is Postmark or Mailgun better?
Postmark is rated high in our evaluation. Both are freemium.
What are Postmark and Mailgun used for?
Postmark: Transactional email service. Mailgun: Email API for developers.
What does Postmark cost vs Mailgun?
Postmark is freemium (free tier + paid plans). Mailgun is freemium (free tier + paid plans). Visit their websites for detailed pricing.