Postmark
A transactional email service focused on fast, reliable delivery, from $15 a month for 10,000 emails, with a 100-email free tier.
- Free tier
- By volume
- Cloud
- Transactional email
- Independent sources
- Verified 11 Nov 2026Sources are dated on this profile
- 1 sourceLinked, typed and dated
- Independent third-party sourcesHow this profile was compiled
- Not an endorsementStack18 has not tested this product
What is Postmark?
Postmark is a transactional email service that separates message streams, publishes delivery stats and focuses on inbox placement.
- Best forApps where transactional delivery speed matters
- Team size fitSmall teams, Mid-size teams
- PricingFree 100/mo; Basic $15 (10,000); Pro $16.50; Platform $18 a month; overage $1.20-$1.80 per 1,000.
- Main limitationOverage costs.
- AlternativesResend, Mailgun, SendGrid · compare all
Postmark overview: who it is for and what it does.
Postmark separates transactional and broadcast streams and publishes delivery statistics.
An October 2026 guide lists a free tier of 100 emails a month, Basic at $15 for 10,000 emails, Pro $16.50 and Platform $18, with overage of $1.20 to $1.80 per 1,000.
It notes the "up to 4 times faster" claim is the vendor's own, and Bulk API access requires contacting support.
Main problem it solves
Gets important emails to the inbox fast.
Typical customer segment
Small and mid-size teams.
Target users
- Developers
- SaaS founders
- Product teams
Primary use cases
- Password resets
- Receipts
- Notifications
- Message streams
What makes it distinct
- Delivery focus.
- Separate streams.
- Published stats.
Postmark features explained.
Plans (per month, 10,000 emails)
- Basic
- $15.
- Pro
- $16.50.
- Platform
- $18.
Usage
- Free
- 100 a month.
- Overage
- $1.20-$1.80 per 1,000.
- Bulk API
- Via support.
Delivery
- Streams
- Separate.
- Stats
- Published.
- Speed claim
- Vendor: up to 4x faster.
Postmark pricing and plans.
Figures reported by independent sources; vendor page not reviewed directly. Checked 11 Nov 2026 against Dupple.
Pricing model
Monthly plans plus overage.
Free plan
Yes (100/mo)
Free trial
Not documented
Postmark plans and prices (USD)
Free
$0
Free
100 a month.
Basic
$15 per month
Monthly
10,000 emails.
Pro
$16.50 per month
Monthly
More features.
Platform
$18 per month
Monthly
Most features.
Dupple (October 2026).
Prices change. Confirm current plans and terms on the vendor's site before you decide.
Visit official website (external) ↗See alternativesPostmark integrations, API and platforms.
Important integrations
- Zapier
- Rails
- Laravel
- Node.js
Supported platforms
- API
- Web
API
Core product is an API.
Data import and export
Not reviewed for this profile.
Integration coverage was not assessed in full. Check Postmark's integrations directory and documentation for your tools.
Postmark pros and cons.
Strengths, limitations and best fit. Each point cites a source; editorial summaries are not customer reviews.
Top Postmark alternatives and competitors.
Resend
A modern developer email API with React Email support, free for 3,000 emails a month and Pro at $20 for…
Explore →Related productMailgun
A developer email API with analytics, validation and inbound routing, free for 100 emails a day and from…
Explore →Related productSendGrid
Twilio's email platform for transactional and marketing email, from $19.95 a month (Essentials) after a…
Explore →Postmark compared with similar transactional email and SMS API services.
Summaries come from each profile. This is a side-by-side aid, not a ranking.
| Product | Pricing model | Starting price | Free tier | Channel | Best for |
|---|---|---|---|---|---|
| Postmark | Volume tiers | $15/mo | Yes (100/mo) | Deliverability | |
| Amazon SES | Per 1,000 emails | $0.10/1,000 | Credits only | Lowest cost | |
| MailerSend | Volume tiers | Free; $7/mo | Yes (500/mo) | Email + SMS | Templates + SMS |
| Mailgun | Volume tiers | Free; $15/mo | Yes (100/day) | Developer control | |
| Mailtrap | Volume tiers | Free; $30/mo | Yes (4,000/mo) | Testing + sending | |
| Plivo | Per message | $0.0077/SMS (US) | No | SMS + voice | Low rates |
Postmark vs competitors: head-to-head comparisons.
Each comparison has a feature table, pricing side by side, strengths and limits, and best-fit scenarios.
Postmark discussions and buying questions.
No published discussions mention this product yet.
Postmark questions and answers
What is Postmark used for?
Postmark is a transactional email service that separates message streams, publishes delivery stats and focuses on inbox placement. Typical uses include password resets, receipts, notifications, message streams.
How much does Postmark cost?
Basic is $15 a month for 10,000 emails; Pro $16.50 and Platform $18.
Is Postmark faster?
Postmark claims up to 4x faster delivery; the guide did not test it.
Does Postmark do bulk email?
A Bulk API is available via support.
How does Postmark compare with its competitors?
Stack18 publishes head-to-head comparisons of Postmark vs Resend and SendGrid vs Postmark, each with a feature table, pricing and best-fit scenarios.
What are the main alternatives to Postmark?
The main alternatives to Postmark covered on Stack18 are Resend, Mailgun and SendGrid. Resend may suit developers building modern apps with React. Mailgun may suit developers needing analytics, validation and inbound email. SendGrid may suit teams wanting one vendor for transactional and marketing email. See the Postmark alternatives guide for a side-by-side table.
What are the pros and cons of Postmark?
Strengths: Delivery focus. Published delivery stats. Limitations: Overage costs. Bulk API needs support.
Who is Postmark best for?
Postmark may suit apps where transactional delivery speed matters; SaaS products; ecommerce receipts. It may be less suited to bulk marketing; SMS needs.
What integrations does Postmark support?
Documented integrations and ecosystem items include Zapier, Rails, Laravel, Node.js. API: Core product is an API.
When was the Postmark profile last verified?
Sources for this profile were last reviewed on 11 Nov 2026. 1 source is listed under Sources, and prices and plans can change, so confirm with the vendor.
Where this information comes from.
- The Best Transactional Email Services in 2026 (updated 14 October 2026) Dupple Third-party Accessed 11 Nov 2026
Secondary-source profile. Vendor pages were not reviewed directly for this profile. Facts and prices are taken from independent third-party sources and may differ from the vendor's current pages. Confirm with the vendor before buying.
Pricing comes from dated 2026 guides; usage-based bills depend on volume, carrier fees and add-ons. Confirm with the vendor before buying. Capabilities were not tested.
Stack18 has not tested this product or received anything from the vendor for this profile. Editorial summaries of vendor information are not endorsements. Confirm details with the vendor before buying.
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