Set up DMARC and see who's sending email using your brand's domain.

Postmark vs. Mailgun

Save yourself the hassle of tracking down lost emails. Choose Postmark to enjoy great deliverability as standard, and a helping hand whenever you need one.


Postmark and Mailgun, compared

Postmark is a Mailgun alternative providing everything you’ll need for sending application emails, processing inbound email, and tracking user engagement.

Postmark Mailgun
Transactional emails
Bulk/broadcast email
(New in Postmark: Send your promotional or bulk email via Broadcast Message Streams.)
Separate infrastructure for transactional and bulk email
Comprehensive official libraries
Community libraries
Spam score checking
Spam complaint handling
Bounce handling
Shared IPs
Dedicated IPs
(Auto-managed based on individual sending volume)
Separate environments with servers
Pre-made email templates
Template engine
Inbox preview
(Available when you send with Postmark Templates)
Scheduled delivery
A/B testing
Email address validation
Seen something inaccurate? Let us know.
Postmark Mailgun
Inbound email processing
RegEx matching on all email headers ("routes")
Chain multiple filters
UTF-8 encoding
Strip signature and quote blocks
Spam filtering
Seen something inaccurate? Let us know.
Postmark Mailgun
Delivery rates
Bounce rates
Open rates
Click tracking
Unsubscribe tracking
Spam rates
Full message storage
(45 days)
(3 days)
Automatic tagging
Custom tagging
Custom header metadata tag
Custom tracking domain
Geolocation data
Email client and device tracking
Real-time notifications
Seen something inaccurate? Let us know.
Postmark Mailgun
Time to Inbox
System availability API
Service availability API
Seen something inaccurate? Let us know.
Postmark Mailgun
Opportunistic TLS
Enforced TLS
Seen something inaccurate? Let us know.

Exceptional deliverability for everyone

With Mailgun, you'll need to upgrade to a dedicated IP or "managed email service" and pay extra for "better deliverability." At Postmark, great deliverability isn't an up-charge. It's simply included, and we share live delivery data so you can judge for yourself.

  • Gmail

  • Apple

  • Hotmail

  • AOL

  • Yahoo

Time to Inbox data updated every 5 minutes

With most providers, when deliverability issues arise, they suggest that paying more for a dedicated IP address will fix the problems. We believe that's an abdication of responsibility to ensure your emails reach customers every time. It’s our job to provide you with great deliverability with or without dedicated IP addresses.

Whether you send thousands of emails or millions of emails, you’ll see the same quality of deliverability across our entire service. You'll be hard-pressed to find a provider more willing to stand by the quality of their shared IPs than Postmark. If or when the time comes that a dedicated IP address makes sense, we'll set you up on one.

Great support through multiple channels.

Like most providers, Mailgun offers an additional cost "Managed Email Service." At Postmark, we view these services as a fundamental responsibility we have to all of our customers. There's no up-charge for great support.

Customer Happiness Rating
  • 😃 Great (95%)
  • 🙂 Okay (2%)
  • 😔 Not Good (3%)

Customer feedback gathered through Help Scout over the past 60 days.

Everyone gets great support no matter how much you spend.You can use email, live chat (during business hours), call us, or even schedule time. You'll usually hear back in a couple of hours. If you’re having delivery problems, we’ll never just tell you to just give us more money and upgrade to a dedicated IP address. We’ll dive in and help you get to the bottom of things.

We also have comprehensive developer documentation and a centralized support center packed full of resources to keep you going when our support team is enjoying some well-earned downtime with their families.

We’re here to help!

Take a moment to meet our customer success team.

  • Abdullah Al-hennawy Abdullah
  • Anita Pericic Anita
  • Anna Ward Anna
  • Brian Kerr Brian
  • Dana Chaby Dana
  • Fionnuala Walls Fionnuala
  • Jordan Dibb Jordan
  • Natalie Keshlear Natalie
  • Natalie Robles Natalie
  • Shelley Jeżewska Shelley

Unrivaled troubleshooting capabilities

When it's time for troubleshooting, nobody logs and retains more helpful details about the event history and content of messages than Postmark.

Search, filter, and view 45 days of detailed message activity from the activity feed.
Search, filter, and view 45 days of detailed message activity from the activity feed.
Detailed message event logs for every email.
Detailed message event logs for every email.
Full Content
Full Content

While Mailgun provides 30 days of event history to paid accounts and 3 days of full content history, Postmark provides a full 45 days of both message events and full content rendering to all accounts (and retention can be customized from 7 to 365 days if needed). Never again have to wonder exactly what happened to an email when a customer emails support.

Pre-built and fully-tested email templates

Save time getting started with our thoroughly documented, pre-built, and exhaustively tested email templates.

Start from a variety of pre-built templates or build your own.
Start from a variety of pre-built templates or build your own.
Edit and tweak your templates directly in Postmark.
Edit and tweak your templates directly in Postmark.
Preview your templates with easily updatable test data.
Preview your templates with easily updatable test data.

Postmark offers a full set of pre-built and exhaustively tested email templates to help you get started. For each of these templates, we've also written extensive guides about best practices for configuration, usability, engagement, copywriting, and more.

Whether you need more templates or just want to custom-build your own set of templates, we've built and open-sourced MailMason, a complete toolset to streamline building and updating a set of consistent transactional emails. It makes it easier build your emails by enabling you to use partials, automatically inline your CSS (or SCSS), test emails in Litmus, automatically generate text equivalents, and much more.

Customers that already made the switch...

For outgoing transactional mail I strongly recommend Postmark. Had bad experience @ Mailgun and SendGrid with delivery.

Marijn Huizendveld

Marijn Huizendveld

via Twitter

Okay @postmarkapp is amazing. Why has no one told me about this? Good riddance to all their competitors I've put up with for too long.

Alexander Obenauer

Alexander Obenauer

via Twitter

At #Bokio we are now using @postmarkapp instead of @Mail_Gun. I really liked mailgun but we needed far better delivery as our emails are very critical.

Mikael Eliasson

Mikael Eliasson

via Twitter

Using a completely free product and still getting great support from @postmarkapp. Two days and I haven't heard back from @Mail_Gun

Andrew Vos

Andrew Vos

via Twitter

Postmark without question. High-quality product and unreal support. Dabbled with all over the years, and SendGrid/Mailgun were some of the worst experiences I’ve ever had in terms of both product and support.

Garrett Dimon

Garrett Dimon

via Twitter

Postmark every day. UX is great. Delivery is top-notch and super fast. I've also used Sparkpost and Mailgun and they just don't compare.

Pete Keen

Pete Keen

via Twitter

I came from Mailgun and left because too many emails went missing. Now, my email shows up instantly for people and the amount of time I save on support requests is worth it. A+ quality service.

Chris Leippi

Chris Leippi

Founder at

Super customer support, on-boarding process especially incredible. Service 10/10. Struggled with other services like Mailgun — never again. Keep being awesome.

Fredric Endrerud

Fredric Endrerud

Lead developer at Bary AS

I came from Mailgun, which gave me headaches. Every second counts when we send an alert to gamers. I love the fact that I can see when mails are opened and how long the whole process took. It just works, which is not so obvious apparently (looking at Mailgun). Thanks Postmark Team <3 !

Max Vaesse

Max Vaesse

Owner at Premium ARK

Clipboard with a checklist

What would it take to switch to Postmark?

We’ve put together a comprehensive guide that covers everything you need to know about switching from Mailgun to Postmark.

How much does Postmark cost?

Emails per month
Monthly price
Additional emails

Need more emails?

Get in touch to discuss our high-volume tiers.

Do you offer a free trial?

All new accounts start off on our free developer plan with 100 emails per month. Use it for however long you need, it doesn’t expire.

Do you offer dedicated IPs?

Dedicated IPs are available to high-volume senders. Read about our policy for issuing dedicated IPs.

What happens if I go over my plan’s monthly email limit?

Extra emails on our paid plans are calculated at the end of your billing cycle and included with your plan cost for the upcoming month.

What payment types do you accept?

We accept payments via Visa, MasterCard, American Express, Diners, and JCB. We do not accept PayPal or Purchase Orders.

Can I send bulk marketing email through Postmark?

Yes you can! To comply with industry best-practices and to maintain our high deliverability, it's important though that transactional and marketing emails never mix. That's why we created Message Streams, a parallel but completely separate sending infrastructures for your transactional and broadcast emails.

Do you offer high-volume plans?

Yes! Contact us to learn more about our high-volume pricing.

Is Postmark the only Mailgun alternative out there?

Actually, we're not—and since we know that Postmark might not always be the right choice, we put together this list of Mailgun alternatives that includes a handy comparison spreadsheet for you to check out.

Join the thousands of companies that already trust Postmark

Let’s put an end to deliverability issues

Fast and reliable delivery. Extensive API documentation. Fantastic support.