Postmark
Transactional email delivery service — send account notifications, receipts, and alerts with high reliability and speed.
| What is it | Transactional email delivery service — send account notifications, receipts, and alerts with high reliability and speed. |
|---|---|
| Pricing | Freemium — from $15/mo |
| Free tier | Yes |
| Platform | Web Application |
| API | Yes |
| Works with | Integrately, Make, n8n, Zapier |
| Best for | sending account verification emails, delivering order confirmations and receipts |
| Domain registered | 2009 |
Data updated Aug. 1, 2026
What does Postmark do?
Postmark is a transactional email delivery service that helps applications send automated emails like account notifications, receipts, and alerts. It provides a reliable infrastructure that ensures emails reach recipients' inboxes quickly, often in under a second. Developers can integrate Postmark using its REST API or SMTP service, with official libraries available for Ruby, Python, PHP, .NET, Node.js, and other programming languages.
The service stands out for its focus on deliverability and speed, with infrastructure optimized to avoid spam filters and ensure high inbox placement rates. It includes features like email open tracking, bounce handling, and detailed analytics to monitor email performance. Unlike many email services, Postmark offers human customer support with quick response times, which users consistently praise in reviews.
Postmark works best for development teams building applications that need to send transactional emails reliably. It's particularly valuable for e-commerce platforms sending order confirmations, SaaS applications delivering user notifications, and any service requiring automated email communication with customers. The service has delivered billions of emails for companies like 1Password, IKEA, and Asana since its launch in 2010.
Key features
What makes it stand outWho is Postmark for?
Who benefits most from this toolPricing
Free tier available — start without a credit cardFree
- 100 emails
- 100 emails/month
- No overages allowed
- Testing integration
- Evaluating deliverability
- Side projects with low volume
Basic
- 10,000 base emails
- 1.8 extra emails per 1000
- Industry-leading deliverability rates & speed
- 45-day data retention
- 5 Custom sending domains
- Unlimited emails/day
- Detailed analytics and insights
Pro
- 10,000 base emails
- 1.3 extra emails per 1000
- Industry-leading deliverability rates & speed
- Customizable data retention up to 365 days
- 10 Custom sending domains
- Unlimited emails/day
- Detailed analytics and insights
- Inbound email processing
Platform
- 10,000 base emails
- 1.2 extra emails per 1000
- Industry-leading deliverability rates & speed
- Customizable data retention up to 365 days
- Unlimited Custom sending domains
- Unlimited emails/day
- Detailed analytics and insights
- Inbound email processing
Trust & presence
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