Postmark pricing explained (2026): tiers, overage and the inbound line
Postmark prices transactional email per send, and it is one of the few providers in the category that publishes its overage rate. As published on 22 September 2026: a free developer tier at 100 emails a month; Basic from $15 a month at 10,000 emails with overage at $1.80 per 1,000; Pro at $16.50 with overage at $1.30 per 1,000; Platform at $18.00 with overage at $1.20 per 1,000. Inbound email processing is included on Pro and Platform but not on Basic or the free tier — which is the line most comparisons miss.
A rare thing in transactional email: a provider that publishes what you pay when you go over.
Most transactional providers publish a tier price and keep the overage rate inside the account, which makes the real cost of a spiky month impossible to model before you commit. Postmark publishes both. Everything here came from Postmark’s own pricing page on 22 September 2026.
The tiers, as published
All paid tiers are listed with unlimited emails per day, and overage is calculated at the end of the billing cycle and added to the following month’s cost. As published on 22 September 2026.
How to read this table properly
- The $1.50 between Basic and Pro is not the real gap. Pro costs $1.50 more a month and cuts overage from $1.80 to $1.30 per 1,000 — a $0.50 saving per 1,000, so the extra $1.50 pays for itself at 3,000 emails over the included volume, or about 13,000 total. Past that, Pro is cheaper outright: at 40,000 sent, the 30,000 over costs $54 on Basic against $39 on Pro, making the month $69 on Basic and $55.50 on Pro. A tier comparison that reads only the monthly price gets this exactly backwards.
- Inbound processing is the real Basic limitation. If you parse replies — support threads, bounce handling beyond the standard webhooks, anything that receives mail — Basic cannot do it and the price difference stops being the deciding factor.
- Overage is billed a month late. A spike shows up on the following invoice, which is worth knowing before a launch month rather than after it.
- The free tier is for development, not production. 100 emails a month is a test allowance; a single signup flow in production exceeds it.
Transactional on its own, or on the same platform as marketing
Postmark is a specialist: transactional email, done narrowly and well, with a reputation for inbox placement that is deservedly good. The structural question is not price but whether you want two vendors.
- Two platforms means two sets of DNS records, two reputations to watch, two bills, and a contact who exists twice — once as a subscriber and once as a user. It also means a marketing send cannot degrade the deliverability of your password resets, which is a genuine argument for separation at scale.
- One platform means a single contact record and one set of records to maintain, with the two streams metered separately so neither can starve the other. That is how Bluey’s transactional API is built, and the case for it is set out on marketing and transactional on one platform.
- If you only ever send receipts and never market to anyone, a specialist is a perfectly rational purchase and we would not pretend otherwise. See the full Bluey vs Postmark comparison for where each wins.
Postmark pricing FAQ
How much does Postmark cost?
As published on 22 September 2026: Basic $15.00 a month from 10,000 emails, Pro $16.50 and Platform $18.00 at the same included volume, plus a free developer tier at 100 emails a month. Overage runs $1.80, $1.30 and $1.20 per 1,000 on Basic, Pro and Platform respectively.
What is Postmark's overage rate?
$1.80 per 1,000 emails on Basic, $1.30 on Pro and $1.20 on Platform, as published on the pricing page. Publishing this at all is unusual — several competitors disclose overage only inside the account, which is why their real cost in a spiky month cannot be modelled before you sign up.
Does Postmark include inbound email?
Inbound processing is included on Pro and Platform. Basic and the free developer tier are listed without it. If you receive and parse mail, that rules Basic out regardless of price.
Is Postmark cheaper than Bluey for transactional email?
At low volumes the published monthly prices are close enough that the deciding factor is usually whether you want transactional and marketing on one platform or two. Bluey's transactional plans are on our pricing page; compare both at your real monthly volume, including the overage you would expect in a busy month.
Which Postmark tier should I choose?
Work it out from expected overage rather than the monthly price, since the gap between tiers is small and the overage gap is not. If you need inbound processing, the answer is Pro or Platform whatever the volume.
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