Mailgun vs Postmark: Which is Better in 2026?
Choosing between Mailgun and Postmark 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.
Short on time? Here's the quick answer
We've tested both tools. Here's who should pick what:
Mailgun
Send, parse, and validate emails with a reliable developer API
Best for you if:
- • Mailgun is an email API service for developers sending transactional email
- • It handles email delivery, validation, and tracking at scale
Postmark
Reliable, fast transactional email delivery for developers
Best for you if:
- • 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
| At a Glance |  Mailgun |  Postmark |
|---|---|---|
Starts at | $35/moFoundation | $15/moBasic |
Best For | ||
Rating | - | - |
Choose Mailgun or Postmark?
Choose Mailgun if
Send, parse, and validate emails with a reliable developer API
- Powerful API
- Email validation
- Good logs
Choose Postmark if
Reliable, fast transactional email delivery for developers
- Sub-second delivery times significantly faster than most competitors
- Message streams separate transactional from promotional to protect deliverability
- Premium support included on all plans at no extra cost
- Budget matters ($15/mo vs $35/mo)
| Feature | Mailgun | Postmark |
|---|---|---|
| Pricing Model | Freemium | Freemium |
| User Rating | ★4.2/5 518 reviews | ★4.5/5 128 reviews |
| Categories | EmailDeveloper Tools | EmailAPI Tools |
In-Depth Analysis
Mailgun
Send, parse, and validate emails with a reliable developer API
Strengths
- +Powerful API
- +Email validation
- +Good logs
Weaknesses
- -Complex pricing
- -Support can be slow
Key features
Postmark
Reliable, fast transactional email delivery for developers
Strengths
- +Sub-second delivery times significantly faster than most competitors
- +Message streams separate transactional from promotional to protect deliverability
- +Premium support included on all plans at no extra cost
- +Generous free tier with 100 emails per month that never expires
- +Clean developer-focused API with SDKs for all major languages
Weaknesses
- -Not designed for marketing or newsletter campaigns
- -Dedicated IPs require minimum 300,000 emails per month
- -Free plan limited to 100 emails which is very low for production use
- -Overage pricing can add up quickly at scale without pre-purchasing volume
- -No built-in drag-and-drop email builder for non-technical users
Key features
Pricing: Mailgun vs Postmark
| Plan | Mailgun | Postmark |
|---|---|---|
| Tier 1 | Free Free | Free Free |
| Tier 2 | $35 Foundation | $15 Basic |
| Tier 3 | $90 Scale | $16.5 Pro |
| Tier 4 | Custom Enterprise | $18 Platform |
Pricing verified from each vendor's public pricing page. Compare in detail on Mailgun pricing and Postmark pricing.
Who Should Use What?
On a budget?
Both are freemium. Compare plans on their websites.
Go with: Mailgun
Want the highest-rated option?
Neither has user reviews yet.
Go with: Mailgun
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?
Both are email tools. Compare their specific features to decide.
How important are ratings?
Neither has user reviews yet.
Key Takeaways
Postmark
- Higher user rating: 4.5/5 vs 4.2/5
- Free tier available
- Our pick for this comparison
Mailgun
- Larger review base (518 reviews)
The Bottom Line
Postmark is our pick.
Frequently Asked Questions
Is Mailgun or Postmark better?
Postmark is rated in our evaluation. Both are freemium.
What are Mailgun and Postmark used for?
Mailgun: Send, parse, and validate emails with a reliable developer API. Postmark: Reliable, fast transactional email delivery for developers.
What does Mailgun cost vs Postmark?
Mailgun is freemium (free tier + paid plans). Postmark is freemium (free tier + paid plans). Visit their websites for detailed pricing.