Postmark
Transactional email service built around one promise: your emails hit the inbox
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Free for 100 emails/mo, from $15/mo
Postmark has been laser-focused on one thing for over a decade: making sure transactional emails hit inboxes, not spam folders. Password resets, order confirmations, shipping notifications — the emails your users actually need to receive. They keep their deliverability high by refusing to send marketing email on the same infrastructure.
You pay more per email than alternatives, but for transactional messages where delivery matters (think: password resets, payment receipts), that premium buys real reliability. If your app sends emails that users rely on, Postmark is the safest bet.
What's good
- Industry-leading deliverability — 99%+ inbox placement
- Emails typically arrive in under 10 seconds
- Detailed delivery analytics and debugging tools
Watch out for
- More expensive per email than Resend or SendGrid
- Transactional email only — no marketing campaigns, newsletters, or bulk sends
- 100 email free tier is barely enough to test with