site.postmarkapp.com pricing: from $15 for 10,000 emails, inbound from Pro

Postmark's plans as its pricing page lists them, which plan receives email, how long messages are kept, and the cost at higher volume.

Published by: MarkRelay Research
Updated: October 25, 2026
Sources: 5 primary sources, linked below

Summary

Postmark's free developer plan sends 100 emails a month with no overage. Paid plans start at 10,000 emails: Basic $15 (then $1.80 per 1,000), Pro $16.5 ($1.30) and Platform $18 ($1.20). Inbound email processing starts on Pro, message history is 45 days by default, and dedicated IPs start at $50 a month for senders above 300,000 emails a month. MarkRelay covers the same send-and-receive job from your own Cloudflare account, keeps every message in a mailbox, and costs $99 a year plus Cloudflare's per-email price.

Key findings

1Free: 100 emails a month, no overage, up to 10 sending domains.
2Basic $15, Pro $16.5, Platform $18 a month, each from 10,000 emails; overage $1.80, $1.30 and $1.20 per 1,000.
3Inbound email processing is included on Pro and Platform, not on Free or Basic.
4Message history: 45 days; Pro and Platform can extend it to 365 days with a paid add-on from $5 a month.
5Dedicated IPs: an add-on from $50 a month per IP on Pro and up, for 300,000+ emails a month.

Questions this report answers

Asked by real people, quoted as they wrote them.

“Best transactional email service for Next.js apps”

r/nextjs, 53 comments

Postmark Pro is $16.5 for 10,000 emails with inbound included; Resend Pro is $20 for 50,000. If the app also needs mailboxes your team reads, MarkRelay adds them on Cloudflare.

“resend vs postmark”

Google and Bing search suggestion

Free: Resend 3,000 a month, Postmark 100. At 10,000 emails: Postmark Basic $15, Resend Pro $20 (covers 50,000). Inbound: Postmark from Pro; Resend on every plan, counted toward the quota.

“mailgun vs postmark”

Google and Bing search suggestion

At 10,000 emails both start at $15: Postmark Basic and Mailgun Basic. Inbound: Postmark from Pro ($16.5); Mailgun Basic has 5 inbound routes.

“Can someone help me out with SMTP with Postmark”

r/homelab

If the homelab's domain is on Cloudflare, Cloudflare Email Sending offers authenticated SMTP on Workers Paid ($5 a month, 3,000 emails included), an alternative to setting up a separate relay.

Postmark plans (USD a month)

On postmarkapp.com	Free	Basic	Pro	Platform
Price	$0	$15	$16.5	$18
Emails included	100	10,000	10,000	10,000
Overage per 1,000	Not allowed	$1.80	$1.30	$1.20
Inbound processing	No	No	Yes	Yes
Message history	45 days	45 days	45 days, up to 365 with add-on	45 days, up to 365 with add-on
Users	Up to 6	Up to 4	Up to 6	Unlimited
Sending domains	Up to 10	Up to 5	Up to 10	Unlimited
Dedicated IP	No	No	From $50/month	From $50/month

Price

Free: $0
Basic: $15
Pro: $16.5
Platform: $18

Emails included

Free: 100
Basic: 10,000
Pro: 10,000
Platform: 10,000

Overage per 1,000

Free: Not allowed
Basic: $1.80
Pro: $1.30
Platform: $1.20

Inbound processing

Free: No
Basic: No
Pro: Yes
Platform: Yes

Message history

Free: 45 days
Basic: 45 days
Pro: 45 days, up to 365 with add-on
Platform: 45 days, up to 365 with add-on

Users

Free: Up to 6
Basic: Up to 4
Pro: Up to 6
Platform: Unlimited

Sending domains

Free: Up to 10
Basic: Up to 5
Pro: Up to 10
Platform: Unlimited

Dedicated IP

Free: No
Basic: No
Pro: From $50/month
Platform: From $50/month

Source: Postmark pricing.

Monthly cost at the same volume

Emails a month	Postmark Pro	Resend	Amazon SES	MarkRelay$99/yr + Cloudflare
10,000	$16.50	$20	$1	$15.70
50,000	$68.50	$20	$5	$29.70
100,000	$133.50	$35	$10	$47.20

10,000

Postmark Pro: $16.50
Resend: $20
Amazon SES: $1
MarkRelay: $15.70

50,000

Postmark Pro: $68.50
Resend: $20
Amazon SES: $5
MarkRelay: $29.70

100,000

Postmark Pro: $133.50
Resend: $35
Amazon SES: $10
MarkRelay: $47.20

Postmark Pro is shown because it includes inbound. MarkRelay is Cloudflare Workers Paid and per-email sending plus the $99 license spread over twelve months, with receiving into mailboxes included. Source: Amazon SES pricing.

Message history, or a mailbox

Postmark keeps sent and received messages for 45 days by default, as a log for developers. MarkRelay keeps every received and sent message in a mailbox in your own D1 and R2, readable in a webmail and over the API, and posts a signed webhook for each new email, so the app gets an event and the team gets an inbox.

Where MarkRelay fits

A good fit when

Your domain is on Cloudflare and the app should send and receive in your own account, with receiving free.
Mailboxes your team can open next to the API, and many domains without per-domain fees.

Look elsewhere when

A hosted relay with nothing to deploy, or a dedicated IP and sending SLA.
Very high volume where Amazon SES's per-email price matters most.

Common questions

Is Postmark free?

For 100 emails a month, with no overage.

Which Postmark plan includes inbound email?

Pro and Platform. Free and Basic do not include inbound processing.

Sources and method

Postmark pricing (postmarkapp.com/pricing)
Postmark inbound (postmarkapp.com/developer/user-guide/inbound/parse-an-email)
Resend pricing (resend.com/pricing)
Mailgun pricing (www.mailgun.com/pricing/)
Amazon SES pricing (aws.amazon.com/ses/pricing/)

Facts are taken from each vendor's own pricing pages, documentation or terms as of the updated date above; prices are in US dollars per month unless stated. Cost comparisons apply each vendor's published rates to the same volume. MarkRelay is not affiliated with Postmark;"site.postmarkapp.com" in the title names the site these facts come from. MarkRelay sells a self-hosted email app, which this page mentions where it fits. Spotted something outdated? Tell us.

Revisions

October 25, 2026: First published; every fact checked on the vendor's own pages.