Warming up
Every account now comes with a free mailbox — warmed automatically, no domain to buy. See how it works
Transactional email API
Every account now comes with a free mailbox — warmed automatically, no domain to buy. See how it works
The 6 paid monthly Postmark plans compared here run from $15 (Basic 10k) to $775 (Basic 1.5M) as of September 2026, plus a free plan: 100 emails a month. At 50,000 emails a month the cheapest plan that covers it is Basic 50k at $55, about $1.10 per 1,000 emails. Overage is not included in these figures.
Every monthly plan compared here, with the effective price per 1,000 emails when the plan is used in full.
| Plan | Emails a month | Price a month | Per 1,000 emails |
|---|---|---|---|
| Free | 100 | Free | n/a |
| Basic 10k | 10,000 | $15 | $1.50 |
| Basic 50k | 50,000 | $55 | $1.10 |
| Basic 125k | 125,000 | $115 | $0.92 |
| Basic 300k | 300,000 | $245 | $0.82 |
| Basic 700k | 700,000 | $455 | $0.65 |
| Basic 1.5M | 1,500,000 | $775 | $0.52 |
The cheapest published plan that covers each monthly volume, next to Warmerly for reference.
| Emails a month | Postmark | Warmerly |
|---|---|---|
| 10,000 | $15Basic 10k | $15Starter |
| 50,000 | $55Basic 50k | $15Starter |
| 100,000 | $115Basic 125k | $29Growth |
| 500,000 | $455Basic 700k | $279Scale 500k |
List prices, monthly billing, USD: the cheapest published plan that includes that many emails, overage left out. Postmark prices from postmarkapp.com as of September 2026; check their site for current rates. Shaded cells are the cheaper side.
The price is only part of it. These are the limits that change what a plan is worth.
Warmerly sends through Amazon SES and keeps transactional mail apart from cold outreach. It has a free plan of 5,000 emails a month, but it is REST only today: no SMTP relay, delivery webhooks or templates yet. The comparison pages below show the prices and the cases where Postmark is the better pick.
On list prices as of September 2026, the cheapest Postmark plan that covers 10,000 emails a month is Basic 10k at $15. Overage and add-ons such as a dedicated IP are extra.
On list prices as of September 2026, the cheapest Postmark plan that covers 100,000 emails a month is Basic 125k at $115. Overage and add-ons such as a dedicated IP are extra.
100 emails a month.
From $50/mo, for 300,000+ emails a month on Pro or higher.
On list prices as of September 2026: at 10,000 both list at $15; at 50,000 Warmerly lists lower ($15 against $55); at 100,000 Warmerly lists lower ($29 against $115); at 500,000 Warmerly lists lower ($279 against $455). Warmerly lists $15 for 50,000 emails a month and a free plan of 5,000 a month, but it is REST only and has no SMTP relay, webhooks or templates yet.
Create a free account, verify a sending domain and send a test from the dashboard. 5,000 emails a month free, no card.
