Postmark is a transactional email service provider specializing in fast, reliable delivery of critical transactional emails — password resets, order confirmations, account notifications, and system alerts. Unlike marketing email platforms, Postmark focuses exclusively on transactional email with a strict infrastructure separation from bulk/marketing email, resulting in consistently high inbox placement rates. Popular with SaaS companies and developers who cannot afford transactional emails landing in spam.
Postmark
Transactional email delivery with the best deliverability.
Best for: Developers who need the most reliable transactional email delivery with the best inbox placement rates.
- Free trial
4.7/5 ratingEditorial score 93/100postmarkapp.com
Starts at
Free (100 emails/mo)
Start free trial
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Editorial score93/100
The editorial note
What to know about Postmark
Is it right for you?
Who Postmark suits
Choose it if
- Developers who need the most reliable transactional email delivery with the best inbox placement rates.
Look elsewhere if
- Teams needing both transactional and marketing email in one platform — SendGrid or Brevo (formerly Sendinblue) combine both capabilities in one provider for teams that prefer a unified solution
What you get
Key features
- Transactional email infrastructure
- SMTP and REST API
- Delivery event webhooks
- Bounce and spam complaint management
- Email templates with layouts
- Inbound email processing
- Detailed message logs (45 days)
- DKIM and SPF management
Works with
Integrations8
What it costs
Pricing
| Plan | Price | What it includes |
|---|---|---|
| Free | Free (100 emails/mo)Billed monthly | 100 test emails/month, all features, API access, DKIM/SPF setup |
| Developer | $15 / monthBilled monthly | 10,000 emails/month, transactional email, templates, bounce tracking, webhooks |
| Business | $55 / monthBilled monthly | 40,000 emails/month, priority support, dedicated IP option, advanced analytics |
| Enterprise | CustomBilled monthly | Custom volume, dedicated IPs, SLA, account manager, custom contracts |
Prices are recorded from the vendor's public pricing page and can change. Check before you buy.
The trade-off
Pros and cons
Pros
- Specialized transactional email infrastructure — completely separate from bulk/marketing sending
- Industry-leading inbox placement rates for critical account and order emails
- Detailed delivery logs and event-level analytics for every sent message
- Fast delivery speed — messages typically delivered in under 5 seconds
- Excellent SMTP and REST API documentation with official SDKs for all major languages
Cons
- More expensive than SendGrid or Mailgun for high-volume transactional sending
- No marketing email features — need a separate provider for newsletters and campaigns
- Credit-based pricing model can be difficult to estimate for variable sending volume
- Requires separate email marketing platform for any promotional sending
Quick read
At a glance
- Category
- Marketing & SEO
- Pricing model
- Freemium
- Entry plan
- Free (100 emails/mo)
- Free plan
- Not listed
- Free trial
- Available
- Website
- postmarkapp.com
The verdict
Our take on Postmark
The most reliable transactional email service — separated delivery streams guaranteeing password resets arrive is worth the premium.
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