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Postmark Pricing Calculator

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Estimate Postmark transactional cost at your volume — cheapest of Basic, Pro, or Platform, not a frozen Pro row when Platform is cheaper.

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Recipients for SES; messages for plan-based vendors. Slider covers 100–1M; type any whole number.

Estimate from a dated rate card (2026-08-18) — not an invoice. Transactional / API sending only.

Estimate

Cheapest at this volume · rates as of 2026-08-18
Amazon SES · $1.00
Pay as you go
This page’s vendor
Postmark: $15.00

Cheapest in this model at this volume — not “cheapest forever.” Confirm on the vendor’s pricing page.

Ranked transactional email vendor costs
VendorSKUMonthlyEffective / 1kNotes
Amazon SESCheapestPay as you go$1.00$0.10No SES free allowance applied (default).
Cloudflare Email SendingWorkers Paid + Email Sending$7.45$0.75Adds $5.00 Workers Paid unless you already pay for it.
MailgunBasic$15.00$1.50Cheapest modeled Mailgun SKU at this volume.
PostmarkBasic$15.00$1.50Cheapest modeled Postmark SKU at this volume.
SendGrid Email APIEssentials 50k$19.95$2.00Cheapest modeled SendGrid Email API SKU at this volume.
ResendPro 50k$20.00$2.00Cheapest modeled Resend SKU at this volume.

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How to Use

  1. 1 Enter transactional emails per month
  2. 2 Read the Postmark row — Basic, Pro, or Platform, whichever is cheapest at that volume
  3. 3 At 10k, expect Basic $15; at 50k, expect Platform (not Pro)
  4. 4 Compare to SES if you only care about unit rate

Features

  • Same compare engine, Postmark highlighted
  • Free 100/month is a hard cap, not a production SKU at real volume
  • Basic $15 / 10k + $1.80/1k; Pro $16.50 + $1.30/1k; Platform $18 + $1.20/1k
  • Picks Platform at 50k ($66 in the fixture) instead of locking Pro
  • Client-side estimate — not a Postmark invoice

Why it Matters

Transactional purists search “Postmark pricing.” A naive Pro quote at 50k is $68.50; the cheapest modeled SKU is Platform at $66. The engine must not freeze on the middle plan.

★★★★★

Frequently Asked Questions

Why is 50,000 emails Platform instead of Pro?
Platform’s higher floor plus cheaper overage beats Pro at that volume in the 2026-08-18 card ($66 vs $68.50). The calculator is required to pick the cheapest feasible SKU.
What about 10,000 emails?
Basic at $15 — included quota covers 10k with no overage in this model.
Is Postmark Free usable?
Only for 100 emails/month. Above that, Free is infeasible.
Are rates live?
No — dated card. Confirm on postmarkapp.com/pricing.
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