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Postmark Pricing

Postmark is interesting because it does one thing: transactional email. The free tier includes 100 emails per month, paid pricing starts at $15, and the product is built around deliverability and speed rather than bulk marketing features.

Prices verified March 2026

Starting price

$15/mo

Free plan

Yes

100 emails/month, never expires, test integration and side projects

Plans

4

Free tier included

Pricing Analysis

Postmark uses volume-based pricing, which fits its role as a transactional email provider. After the free 100-email tier, plans start with Basic at $15, then Pro at $16.50 and Platform at $18, with pricing tied to sending volume rather than subscriber counts. That makes the bill easy to map to product usage, especially for apps sending receipts, password resets, and account notifications.

The value proposition is deliverability and focus. You are not buying templates, subscriber management, or campaign builders. You are paying for a service that treats transactional mail as mission-critical infrastructure. Compared with all-purpose email platforms, Postmark can look narrow. Compared with other transactional providers, its reputation for inbox placement and fast delivery is the reason teams justify the cost.

The hidden cost is category mismatch. If someone expects marketing-email features, Postmark will seem limited no matter what it costs. There is also the possibility that volume growth pushes the monthly spend higher than expected, especially for product-led companies with lots of notification traffic. But those are not surprise fees so much as the natural result of usage-based billing.

This pricing works best for SaaS products, ecommerce systems, and platforms where transactional email reliability matters more than cheapest-possible sending. If a failed password reset or delayed receipt hurts revenue or trust, paying $15 or more is easy to defend. If you need campaigns, this is the wrong tool.

Free

Free

Up to 100 subscribers

  • 100 emails/month
  • Industry-leading deliverability
  • Full API access
  • Never expires
  • Perfect for testing and side projects

Best for: testing Postmark or lists under 100.

Basic

$15 /month

Up to 10,000 subscribers

  • 10,000 emails/month
  • Overage at $1.80/1,000 emails
  • 45-day data retention
  • 5 custom sending domains
  • Unlimited emails/day
  • Detailed analytics

Best for: growing businesses with up to 10,000 subscribers.

Most popular

Pro

$16.5 /month

Up to 10,000 subscribers

  • 10,000 emails/month
  • Overage at $1.30/1,000 emails
  • Customizable retention up to 365 days
  • 10 custom sending domains
  • Unlimited emails/day
  • Inbound email processing

Best for: scaling businesses that need more capacity.

Platform

$18 /month

Up to 10,000 subscribers

  • 10,000 emails/month
  • Overage at $1.20/1,000 emails
  • Customizable retention up to 365 days
  • Unlimited custom sending domains
  • Unlimited emails/day
  • Inbound email processing

Best for: agencies, large lists, and teams needing advanced features.

Prices shown are for the base subscriber count. Cost scales as your list grows.

Start with Postmark

Free plan available — no credit card required

What's Included in Each Plan

Feature FreeBasicProPlatform
Price Free $15/mo $16.5/mo $18/mo
Subscribers 100 10,000 10,000 10,000

Feature availability may vary. Check Postmark's website for the latest plan details.

Compare Postmark Pricing to Alternatives

Tool Free Plan Starts At Rating
Postmark (this tool) Yes $15/mo 4.6/5
Plunk Yes Free -$15 3.7/5
Amazon SES Yes Usage-based 4.4/5
Mailtrap Yes $15/mo 4.8/5
Mailgun Yes $15/mo 4.2/5
Resend Yes $20/mo 4.2/5
Elastic Email Yes $29/mo 4.4/5

More about Postmark