Mailivery warms up unlimited mailboxes to improve sender reputation and email deliverability with AI-powered interactions.
from $29/mo
About Postmark
What does Postmark do?
Postmark is a transactional email delivery service built for developers and businesses that send mission-critical messages like password resets, order confirmations, and receipts. Unlike marketing email platforms, Postmark focuses exclusively on transactional emails, ensuring they arrive in under a second with a 100% uptime SLA.
Who is it for?
Postmark is ideal for SaaS companies, e-commerce stores, and developers who need reliable, fast delivery of time-sensitive emails. It is not designed for bulk marketing campaigns or newsletters.
Real-world use cases
Common use cases include sending password reset emails, order confirmations, shipping updates, and two-factor authentication codes. Users report emails landing in inboxes in under 1 second, often migrating from Amazon SES, SendGrid, or Mailgun for better deliverability and peace of mind.
Key features
- API & SMTP — Send transactional emails via REST API or SMTP with libraries for Ruby, Python, PHP, Node.js, and more.
- Delivery Analytics — Real-time dashboard showing sent, delivered, bounced, and spam-complaint rates per message.
- Bounce Handling — Automatic suppression of hard bounces and spam complaints; detailed bounce reasons provided.
- Dedicated IPs — Option for dedicated sending IPs to maintain full control over reputation.
- Message Streams — Separate transactional and broadcast streams to keep delivery reputation clean.
- Webhooks — Real-time event notifications for delivery, bounce, open, and click events.
SaaSpartout Score
8.0
/10
Editorial score from our review methodology — not user ratings.
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Postmark Pricing
Postmark pricing: from $15.00/mo. Billing model: Subscription.
For comparison: the median starting price in Marketing & SEO is $29/month, measured across 753 tools we track. See the full SaaS Pricing Index →
Free — $0.00/mo
100 emails/month. No overages. Perfect for testing integration or low-volume side projects.
Basic — $15.00/mo
10,000 emails/month. Extra emails at $1.80/1,000. Includes 45-day data retention, 5 custom sending domains, unlimited daily emails, and detailed analytics.
Pro — $16.50/mo
10,000 emails/month. Extra emails at $1.30/1,000. Includes customizable data retention up to 365 days, 10 custom sending domains, and inbound email processing.
Platform — $18.00/mo
10,000 emails/month. Extra emails at $1.20/1,000. Includes unlimited custom sending domains, customizable data retention up to 365 days, and inbound email processing.
All plans start with a free trial on the Free tier (100 emails/month, never expires).
Frequently asked questions
How much does Postmark cost?
Postmark pricing starts at $15/month for the Basic plan (10,000 emails/month). There is also a Free plan with 100 emails/month, and higher tiers at $16.50/month (Pro) and $18/month (Platform).
Does Postmark have a free plan?
Yes, Postmark offers a free Developer tier with 100 emails per month. It never expires and is ideal for testing or side projects.
What is Postmark used for?
Postmark is used to send transactional emails such as password resets, order confirmations, receipts, and shipping notifications. It is not for marketing or bulk email campaigns.
Who is Postmark best for?
Postmark is best for developers, SaaS companies, and e-commerce stores that need fast, reliable delivery of mission-critical transactional emails.
What are the main alternatives to Postmark?
Popular alternatives include Amazon SES, SendGrid, Mailgun, and SparkPost. However, Postmark is often chosen for its sub-second delivery and 100% uptime SLA.
