The short answer
Postmark is billed per monthly email volume. It has a free tier: 100 emails/mo (never expires). The paid plans we list start at $15/mo (Basic).
Plans and prices
| Plan | Price | What it covers |
|---|---|---|
| Developer (Free) | $0/mo | 100 emails per month, never expires; full API access for testing |
| Basic | $15/mo | 10,000 emails included; overage $1.80 per additional 1,000 emails |
| Pro (Most Popular) | $16.50/mo | 10,000 emails included; overage $1.30 per additional 1,000 emails |
| Platform | $18/mo | 10,000 emails included; overage $1.20 per additional 1,000 emails |
| Dedicated IP add-on | from $50/mo per IP | Requires ~300,000+ emails/month and Pro plan or higher; discouraged for lower-volume senders |
How Postmark bills you
The pricing model is per monthly email volume. Transactional-only specialist that consistently leads deliverability benchmarks with a never-expiring dev tier. Best suited to: fast, high-deliverability transactional mail.
What to watch for on the bill
- Expensive at scale, ~$600-900/mo for 500k emails vs ~$50 on Amazon SES; economics favor SES/Mailgun beyond ~200k/month
- Some long-time users report concerns about pricing posture and practices since the ActiveCampaign acquisition
The pricing page we read
Source: https://postmarkapp.com/pricing. Prices change, so confirm there before you commit.
Compare Postmark with alternatives
Other transactional email apis: SendGrid, Resend, Mailgun, Amazon SES, Loops.
Looking at quality rather than price? See the Postmark score on APIbenchmarks. Full entry: Postmark pricing.