Pricing · InboxRatio Editorial
Postmark pricing (2026)
Prices on this page come from Postmark's official pricing page, checked 21 August 2026: postmarkapp.com/pricing. Monthly billing, prices exactly as shown by the vendor, captured and dated by InboxRatio Editorial.
Summary — generated from our pricing datasets
Postmark's pricing page lists 4 transactional email plans, including a free plan (100 emails/mo). The cheapest paid plan is Basic at $55/mo. At 50,000 emails/mo, Basic at $55/mo is both the cheapest covering plan and the functional tier, the cheapest one with a custom sending domain and webhook event notifications. At 500,000 emails/mo, the functional price is $455/mo on Basic. Averaged across our 3-point volume ladder, those functional prices sit at percentile 96.3 among the 10 transactional email services we price (0 = cheapest), which places Postmark in the Mid-market price band. Published extras include overage from $1.20 per 1,000 emails and a dedicated IP from $50/mo. Every price is as shown by Postmark, captured with the monthly billing toggle active and promotions excluded, and was last checked on 21 August 2026.
From Postmark's official pricing page
Postmark transactional email plans
| Tier | Monthly price | Annual-billed | What's included | Overage /1k |
|---|---|---|---|---|
| Free | $0/mo | — | 100 emails/mo | — |
| Basic | $55/mo | — | 50,000 emails/mo | $1.80 |
| Pro | $60.50/mo | — | 50,000 emails/mo | $1.30 |
| Platform | $66/mo | — | 50,000 emails/mo | $1.20 |
Checked 21 August 2026 on Postmark's official pricing page · monthly billing toggle active, promotions excluded, currency as shown. “—” = not published on the captured tier.
Entry tier vs functional tier
Entry tier
$55/mo
Basic — the cheapest paid plan on the page.
Functional tier at 50,000 emails/mo
$55/mo
Basic — the cheapest tier with a custom sending domain and webhook event notifications.
From our pricing-by-volume dataset
What Postmark costs by email volume
| Volume | Cheapest covering plan | Functional tier | Checked |
|---|---|---|---|
| 50,000 emails/mo | $55/mo | $55/mo(Basic) | 19 August 2026 |
| 100,000 emails/mo | $115/mo | $115/mo(Basic) | 21 August 2026 |
| 500,000 emails/mo | $455/mo | $455/mo(Basic) | 21 August 2026 |
Monthly billing, prices as shown. Where Postmark has no exact step at a volume, the nearest covering step was captured. Functional tier = the cheapest tier with a custom sending domain and webhook event notifications.
Free plan, trial and extras
- Free plan
- Yes — Free: 100 emails/mo
- Overage
- Basic $1.80 per 1,000 emails · Pro $1.30 per 1,000 emails · Platform $1.20 per 1,000 emails
- Dedicated IP
- Basic $50/mo · Pro $50/mo · Platform $50/mo
What each tier unlocks
| Tier | API access |
|---|---|
| Free | yes |
| Basic | yes |
| Pro | yes |
| Platform | yes |
Per-tier clauses as recorded in our pricing dataset (checked 21 August 2026); “limited” = capped or partial, “not stated” = not documented by the vendor.
How Postmark pricing compares
$$$ Mid-market price band in transactional email — average functional-price percentile 96.3 across 3 volumes, among the 10 services we price (0 = cheapest).
- 50,000 emails/mo: #10 of 10
- 100,000 emails/mo: #10 of 10
- 500,000 emails/mo: #9 of 10
From our feature matrix — documented by the vendor
Headline features
- Marketing campaignsBroadcast Message Streams — 'route promotional messages like newsletters through a parallel but separate sending infrastructure'; no marketing-suite tooling
- Transactional emailCore product — 'Transactional Email'
- SMTP relay'SMTP Service'
- Workflow builderNot offered
- API'Email API' with code examples; API on all tiers
- Webhooks'Webhooks' feature (event webhooks on all tiers per comparison table)
- Dedicated IPDedicated IPs listed; add-on $50/mo/IP, Pro+ plans AND >=300k emails/mo only
- SMSNot offered
Features checked 10 September 2026. ✓ documented · ◐ limited or plan-gated · × documented as absent · — not documented.
Generated from our datasets — every value verified and dated
Frequently asked questions
How much does Postmark cost?
Paid Postmark transactional email plans start at $55/mo (Basic), according to Postmark's official pricing page as checked on 21 August 2026. At 50,000 emails/mo, the functional tier is Basic at $55/mo.
Is there a free Postmark plan?
Yes. Postmark's pricing page lists 4 transactional email plans, including a free plan (100 emails/mo). Checked 21 August 2026.
What does Postmark cost at 100,000 emails a month?
At 100,000 emails/mo, Postmark's Basic tier costs $115/mo; it is both the cheapest covering plan and the functional tier (prices as shown, checked 21 August 2026).
What does Postmark's functional tier include?
At 50,000 emails/mo, Basic ($55/mo) is the cheapest Postmark tier with a custom sending domain and webhook event notifications. We compare transactional email services on this functional tier rather than on the headline entry price. Transactional Email pricing compared.
When was Postmark pricing last checked?
On 21 August 2026, from Postmark's official pricing page (https://postmarkapp.com/pricing). Every price on this page carries its capture date.