Transactional email
Resend vs Postmark
Postmark if a delayed password reset would be a serious problem — it has spent a decade optimising transactional delivery speed and keeps message streams separate. Resend if developer experience matters most and you want templates written in React.
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Resend or Postmark — which should you use?
Postmark if a delayed password reset would be a serious problem — it has spent a decade optimising transactional delivery speed and keeps message streams separate. Resend if developer experience matters most and you want templates written in React. Resend starts at Paid from roughly $20/month (free tier: Free tier covering a few thousand emails a month.); Postmark starts at From roughly $15/month for 10,000 emails (free tier: Free developer allowance per month.). Prices are list prices and change, so check the vendor pages before buying.
Last updated 3 August 2026
Transactional email is invisible until it breaks. The things that matter are delivery speed, whether marketing sends can poison your transactional reputation, and how quickly a developer can wire it up.
Both handle those well. They just weight them differently.
Side by side
Resend and Postmark in short.
Resend
Developer-first email API with React Email templates and a clean dashboard.
- Free
- Free tier covering a few thousand emails a month.
- Paid from
- Paid from roughly $20/month
Good at
- React Email lets you build templates as components with real previews
- Setup is genuinely minutes, with good SDKs and clear docs
- Generous free tier for side projects and early products
Weak at
- Younger product, shorter deliverability track record
- Fewer analytics than Postmark on delivery timings
Postmark
Transactional email specialist known for fast, reliable delivery and separate message streams.
- Free
- Free developer allowance per month.
- Paid from
- From roughly $15/month for 10,000 emails
Good at
- Separate transactional and broadcast message streams, so marketing can't harm receipts
- Publishes delivery-time data and has a long reliability record
- Detailed per-message activity logs make debugging simple
Weak at
- Templating is traditional; no component-based workflow
- Stricter about content — it's transactional-first by design
The differences
Where they actually diverge.
| Feature | Resend | Postmark |
|---|---|---|
| Template workflow | React components | Handlebars-style templates |
| Message stream separation | Basic | Core feature |
| Free tier | Yes, a few thousand a month | Small developer allowance |
| Delivery logs | Good | Excellent |
| Track record | Newer | Over a decade |
Pick one
Which one fits you.
Choose Resend if
- Your team writes React and wants templates in the codebase
- You're shipping fast and want a free tier to start
- The dashboard will be used by developers only
Choose Postmark if
- Password resets and receipts are business-critical
- You want marketing and transactional sending firewalled
- Support needs to search individual message logs
When neither is the answer
If you send marketing campaigns as well, don't force one tool to do both. Keep transactional here and campaigns in a marketing tool, on a separate subdomain.
Questions
Common questions.
Should marketing and transactional email share a domain?
Share the root domain but use different subdomains — for example mail.example.com for campaigns and notify.example.com for transactional. If a campaign generates spam complaints, receipts keep landing.
What actually drives deliverability?
Correct SPF, DKIM and DMARC records, a warmed-up sending domain, low complaint rates and low bounce rates. The provider matters far less than these four.
Prices are list prices published by each vendor and change often — check the linked pricing pages before you buy. We take no affiliate commission and nobody pays to appear here.
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