Postmark
Postmark is an email delivery service with an API and SMTP for sending transactional and marketing email. The site is made by ActiveCampaign, LLC. Plans start with a free tier of 100 emails a month, and paid plans begin at $15 a month for 10,000 emails.
Facts checked on against the sources listed at the end of this page.
- Pricing
- FreemiumPaid from $15 a month for Basic (10,000 emails)
- Open source
- NoProprietary
- npm downloads a week
- 1.4Mup 10% on the week before
A good fit for
- App emails such as receipts, password resets and notifications where delivery speed matters
- Teams that want transactional and promotional email on separate streams
- Developers who want a simple API or SMTP service with templates
- Senders that need inbound email processing
Not a good fit for
- Large marketing campaigns and automation: the focus is developer email delivery
- Teams that need a dedicated IP at low volume: it requires 300,000 or more emails a month
- Anyone who needs open source or self-hosting: Postmark is a hosted service
Postmark pricing
Free is $0 for 100 emails a month. Basic, Pro and Platform each start at 10,000 emails a month and charge per 1,000 emails above that.
| Plan | Price | What you get |
|---|---|---|
| Free | $0 a month | 100 emails a month. |
| Basic | From $15 a month | 10,000 emails a month, overage $1.80 per 1,000, up to 15 transactional streams. |
| Pro | From $16.50 a month | 10,000 emails a month, overage $1.30 per 1,000, up to 30 streams, custom retention add-on. |
| Platform | From $18 a month | 10,000 emails a month, overage $1.20 per 1,000, unlimited streams, custom retention add-on. |
Prices in USD, checked on 6 October 2026. Current prices on postmarkapp.com.
Main features
- Email API and SMTP
- Send through a REST API or standard SMTP.
- Message streams
- Keep transactional and promotional email apart. Basic allows up to 15 transactional streams, Pro 30, Platform unlimited.
- Templates
- Email templates for quick setup.
- Inbound email
- Receive and process incoming email.
- Analytics and retention
- 45 days of history on every plan, with 7 to 365 days available as an add-on on Pro and Platform.
- Bulk API
- Newly launched according to the home page.
- Dedicated IPs
- From $50 a month per IP, for senders with 300,000 or more emails a month.
About Postmark
Postmark sends email through an API or SMTP. It separates traffic into message streams, so transactional and promotional email are handled apart. It also provides email templates, inbound email handling, analytics and a newly launched Bulk API.
The site stresses deliverability, with sender vetting and no need for a dedicated IP. The site footer states it is made at ActiveCampaign.
The Basic, Pro and Platform plans start at 10,000 emails a month and differ by overage rate and message stream limits. A Postmark blog archive lists a post about making Pro and Platform features available on lower-volume plans, dated 2025. No February 2026 pricing change was found on the official pages checked.
- Made by
- ActiveCampaign, LLC
- Free plan
- Yes: 100 emails a month, no credit card, does not expire.
Usage and activity
Weekly npm downloads of postmark, last 12 months.
Postmark alternatives
Questions about Postmark
Who owns Postmark?
The site footer says it is made at ActiveCampaign, and the site names ActiveCampaign, LLC as the owner.
Does Postmark have a free plan?
Yes. It allows 100 emails a month with no credit card, and the plan does not expire.
How much does Postmark cost?
Basic is from $15 a month, Pro from $16.50 and Platform from $18, each with 10,000 emails a month. Overage is $1.80, $1.30 and $1.20 per 1,000 emails.
Does Postmark support marketing email?
Yes, through message streams that separate promotional email from transactional email.
Did Postmark change its pricing in February 2026?
The official pages checked do not show it. The pricing page lists the current plans above.
Sources and links
Work on Postmark? Claim this listing. Something wrong or out of date? Suggest a correction. Stats come from the public GitHub and npm APIs and update every day.