Migration Guides

We use Postmark and are very happy with it. Switched from SendGrid due to security problems, dodgy UI, and not storing email content.

OMG! @postmarkapp is a chef's kiss. Mandrill or SendGrid is never again.

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

Btw, I like @postmarkapp way more than @sendgrid.

On top of all the tracking info, in almost four years with Postmark, I can’t remember a single time an outage impacted our business.

I had no luck with Sendgrid support when I needed it, compared to Postmark support which was super helpful.

Avoid for Production - Zero warning, permanent bans for technical testing.

I spent weeks integrating Resend only to have my account permanently suspended after a single deliverability audit. No warning, no 'sandbox' mode notification, just a total block on a legitimate e-commerce domain. Their 'support' is non-existent when you actually need a human to review a technical edge case. Don't build your business on a foundation that can disappear without a conversation. Extremely disappointing for a supposedly developer-first platform.

Wow, even after two years of using Postmark I’m still surprised by how much you value your customers!

I've tried them all ; i'm still am to some extent because i was too lazy to migrate everything. This being said, postmark is my absolutely top choice for features AND deliverability. Resend is only good at UI (and that's a shame, because i really liked their UI) but damn, it is so slow and has so many bugs that i could not use it anymore...