Pick Mailtrap if
dev / lifecycle teams who will stay on Sending Free at $0 (4,000 emails / month) while they open a first Stats chart, then buy Basic at $15 / month (10,000 emails) or Business at $85 / month (100,000 emails).
Read the Mailtrap pageMailtrap vs Postmark
Our take
Pick Mailtrap if dev / lifecycle teams who will stay on Sending Free at $0 (4,000 emails / month) while they open a first Stats chart, then buy Basic at $15 / month (10,000 emails) or Business at $85 / month (100,000 emails). Pick Postmark if app teams who will stay on Free at $0 (100 emails / month, no overages) while they open a first Servers list, then buy Basic at $15 / month (10,000 emails, extra $1.80 / 1,000)
Best for
Mailtrap Delivery / open rates you chart at $0
Postmark Transactional streams you start at $0
Free plan
Mailtrap $0 · / month. 4,000 emails. “To try out Mailtrap.”
Postmark $0 · / month. 100 emails / month. No overages. Never expires. For testing an integration or a side project
Lowest paid
Mailtrap Sending Basic $15
Postmark Basic $15
Next step up
Mailtrap Sending Business from $85
Postmark Pro $16.50
Runs where
Mailtrap Hosted
Postmark Hosted
Watch out
Mailtrap Sending Free is 4,000 emails / month
Postmark Free caps at 100 emails / month with no overages
Last checked
Mailtrap 2026-10-23 · mailtrap.io/pricing
Postmark 2026-10-23 · postmarkapp.com/pricing
Which one, then?
Pick Postmark if
app teams who will stay on Free at $0 (100 emails / month, no overages) while they open a first Servers list, then buy Basic at $15 / month (10,000 emails, extra $1.80 / 1,000) when they leave the 100-email bucket.
Read the Postmark page