Switching to Postmark? Our handy migration guides have everything you need to know about making the shift.
Everything you need to know about moving from SendGrid to Postmark
Everything you need to know about moving from Mailgun to Postmark
Everything you need to know about moving from SES to Postmark
Everything you need to know about moving from SparkPost
Everything you need to know about moving from Mailchimp Transactional to Postmark
Everything you need to know about moving from Resend to Postmark.
Here’s what our customers think of us.
For outgoing transactional mail I strongly recommend Postmark. Had bad experience @ Mailgun and SendGrid with delivery.
I am baffled that anyone would choose Sendgrid over Postmark. If they tried both, they probably wouldn’t. Delivery rates are just night and day honestly!
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.
The migration was a piece of cake. The API was very easy to use. Your website is awesome! The only feedback is that I wish there was a "Search" feature in the API Docs, other than that, your website is a perfect work of art!
We used to get complaints about emails ending up in spam.  After switching to Postmark we’ve had zero issues with that.  Really reduced our headaches.
Love the fact @postmarkapp are publicly sharing their status and deliverability details.
I had no luck with Sendgrid support when I needed it, compared to Postmark support which was super helpful.
OMG! @postmarkapp is a chef's kiss. Mandrill or SendGrid is never again.
“Postmark really impressed us with their focus on transactional emails, instead of just broadcasting.”