Postmark
Transactional email API and SMTP, with broadcasts on a separate stream
Postmark report card
Fair · out of 4.0 · graded Oct 18, 2026
Best for app email kept apart from marketing sends
Postmark keeps app email like password resets and receipts on its own stream, apart from bulk sends, and keeps 45 days of full message history by default. It's the dearest here at 50,000 emails, though: $55 a month on Basic, monthly only. And the free plan is 100 emails a month, which is only good for testing.
Who Postmark is for
- Great if you want password resets kept apart from your newsletters
- Handy when you need to look back at exactly what an email said weeks later
- Good for bootstrapped founders, who can ask support for $75 of credit
Who Postmark is not for
- Pricey if you send 50,000 emails a month, at $55 with no yearly discount
- Skip it if you want a free plan to run a small app on, as it's 100 emails a month
- Not for you if you want a dedicated IP below 300,000 emails a month
Why Postmark gets a 2.2
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- DValue for moneyGraded on 50,000 emails a month: $55 on Basic or $60.50 on Pro, billed monthly only. That's the dearest in this category at that volume, roughly twice the middle. Bootstrapped companies can ask for $75 of credit, which helps a bit.
- CFree plan and trialA free developer plan that never expires and needs no card, but it's 100 emails a month with no way to buy more. That's for testing an integration, not running an app.
- BFeaturesAPI and SMTP with SDKs, separate streams for app and bulk email, inbound email turned into JSON, templates, 45 days of message history and DMARC reports as an add-on. It covers the whole job; inbound needs Pro.
- CEase of useJudged on how fast a developer sends a first email: official SDKs, a sandbox mode, ready-made templates for resets and receipts, and migration guides. You'll still verify a domain first. No rating on record.
- BPlatforms and integrationsWeb, with an API and SMTP, plus Zapier, WordPress, Stripe, Slack, Supabase, Bubble, Netlify and Datadog. No desktop or phone app, so B is the top.
What these grades rest on. Graded from this listing, whose facts were read from Postmark's own pages on 18 October 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
Make Postmark? Put this grade on your site
Paste this where you want the badge. It links here and follows the grade if it changes. About badges
<a href="https://toolgpa.com/tools/postmark#review"><img src="https://toolgpa.com/badge/postmark.svg" alt="Postmark: 2.2 GPA on ToolGPA" width="196" height="56"></a>Where Postmark stands among email sending services
Postmark's GPA of 2.2 is higher than 1 of the 11 other email sending services we grade, and level with 1.
It stands best on features (B, above 2 of 11) and worst on value for money (D, above 0).
Its paid plans start at $15 a month, against a middle price of $15 for the category: 2 of the 10 others that charge start lower.
On features, ease of use and platforms it scores 2.7 out of 4. Nothing scores higher for less, though at least one tool matches that score at a lower price.
Each grade against the category
Every bar is all 12 email sending services we grade, cut by the letter each got. Postmark’s own letter is outlined.
- DValue for moneyAbove 0 of 11
- CFree plan and trialAbove 1 of 11, level with 10
- BFeaturesAbove 2 of 11, level with 9
- CEase of useAbove 0 of 11, level with 11
- BPlatforms and integrationsAbove 0 of 11, level with 11
Price against what you get
Each dot is one of 11 email sending services. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep Postmark, or make your own?
Keep it
To replace Postmark you would be making mail servers with a good name among inbox providers. That is not a weekend's work, with an AI app builder or without one.
That makes this kind of software worth paying for, not this one in particular: 9 of the 11 other email sending services grade higher. It costs $180 a year.
What you could not
- Mail servers with a good name among inbox providers.
- Reading the reports inbox providers send about your domain.
- It plugs into other products, Zapier, WordPress and Stripe among them, and has an API.
- The depth: we grade its features B, which means it covers the whole job.
What this rests on. Postmark’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is Postmark?
Postmark is an email delivery service from ActiveCampaign for sending app email such as password resets, receipts and welcome messages through an API or SMTP. It keeps transactional and bulk email on separate message streams, turns inbound email into JSON for your app, and stores 45 days of message history by default. A free developer plan of 100 emails a month never expires.
Postmark has a free plan. Paid plans start at $15 per month for 10,000 emails. See every plan
Good for
- Software teams whose password resets and receipts must arrive fast
- Apps that need to receive and parse incoming email
- Bootstrapped founders, who can ask for $75 of credit
Worth knowing
- There is no tier between the free 100 emails a month and the 10,000-email paid plans.
- Billing is monthly only; the FAQ says annual plans are not offered yet.
- Basic has no inbound email processing and caps users at 4 and sending domains at 5.
- Dedicated IPs start at $50 a month per IP, need Pro or higher and 300,000 emails a month or more.
Key features
- Email API and SMTP
- Send through a REST API with official SDKs or through SMTP, with batch sending, a sandbox mode and migration guides from other providers.
- Message streams
- Transactional and bulk or broadcast email run on separate sending infrastructure, so marketing sends do not affect password resets and receipts.
- Inbound email processing
- Pro and Platform turn incoming email into a JSON object and post it to a webhook URL your app handles.
- Templates
- Responsive templates for welcome emails, password resets and receipts, with a template editor and import tool.
- Message history and analytics
- 45 days of full message content by default, adjustable from 7 to 365 days, with bounce details, open and link tracking and a stats API.
- DMARC monitoring
- DMARC Digests reports show authentication problems and who is sending with your domain, sold as an add-on from $14 a month per domain.
Postmark pricing
- Starts at
- $15 per month for 10,000 emails
- Free plan
- Free developer plan: 100 emails a month with no expiry and no overages, for testing an integration or a small side project. No credit card needed.
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Free | $0 | 100 emails a month, never expires; extra emails cannot be bought on this plan. |
| Basic | $15per month for 10,000 emails | 5 sending domains, 4 users, 45 days of history, no inbound email. Extra emails $1.80 per 1,000; $55 a month at 50,000 emails. |
| Pro | $16.50per month for 10,000 emails | 10 domains, 6 users, inbound email, retention up to 365 days. Extra emails $1.30 per 1,000; $60.50 a month at 50,000 emails. |
| Platform | $18per month for 10,000 emails | Unlimited domains, servers, streams and users, with inbound email. Extra emails $1.20 per 1,000; $66 a month at 50,000 emails. |
| High volume | Custom | Custom pricing for large senders, arranged through sales. |
Read from postmarkapp.com on Oct 18, 2026. Prices change, so confirm with Postmark before you buy.
Ways to pay less
- Startups$75 credit for bootstrapped companies
Companies that have launched, are charging for their product and have taken no outside investment can ask support for $75 of account credit.
Stated on postmarkapp.com
Works with
Postmark alternatives
- Postmark vs Twilio SendGrid
Free trial · from $19.95/mo
- Postmark vs Mailgun
Free plan · from $15/mo
- Postmark vs Resend
Free plan · from $20/mo
- Postmark vs Amazon SES
Free trial
- Postmark vs MailerSend
Free plan · from $6.30/mo
Common questions
Is Postmark free?
Postmark has a free plan. Free developer plan: 100 emails a month with no expiry and no overages, for testing an integration or a small side project. No credit card needed. Paid plans start at $15 per month for 10,000 emails.
How much does Postmark cost?
Postmark lists 5 plans. Free: $0. Basic: $15 per month for 10,000 emails. Pro: $16.50 per month for 10,000 emails. Platform: $18 per month for 10,000 emails. High volume: custom pricing. Prices were read from postmarkapp.com on Oct 18, 2026.
What platforms does Postmark work on?
Postmark is available on Web.
Does Postmark offer any discounts?
Postmark publicly lists the following: $75 credit for bootstrapped companies.
Does Postmark have an Android app?
No Android app was listed when its pages were read on Oct 18, 2026. Postmark is listed for Web.
Does Postmark have an iPhone app?
No iPhone app was listed when its pages were read on Oct 18, 2026. Postmark is listed for Web.
Is Postmark open source?
Postmark is not described as open source on its own site, as read on Oct 18, 2026.
Does Postmark have an API?
Yes. Postmark offers a public API, according to its own site.
What does Postmark integrate with?
Postmark's listing names Zapier, WordPress, Stripe, Slack, Supabase, Bubble, Netlify and Datadog. A listing names up to eight integrations, so it may connect to more.
Who makes Postmark?
Postmark is made by ActiveCampaign, LLC.
What are the alternatives to Postmark?
The closest alternatives to Postmark in our directory are Twilio SendGrid, Mailgun, Resend, Amazon SES and MailerSend. Each one has a side-by-side comparison with Postmark.
How does Postmark compare with other email sending services?
Postmark's GPA of 2.2 is higher than 1 of the 11 other email sending services we grade, and level with 1. It stands best on features (B, above 2 of 11) and worst on value for money (D, above 0).
Is Postmark good value for money?
ToolGPA grades Postmark D for value for money. Its paid plans start at $15 a month, against a middle price of $15 for the category: 2 of the 10 others that charge start lower. On features, ease of use and platforms it scores 2.7 out of 4. Nothing scores higher for less, though at least one tool matches that score at a lower price.
Could I make my own version of Postmark?
To replace Postmark you would be making mail servers with a good name among inbox providers. That is not a weekend's work, with an AI app builder or without one. That makes this kind of software worth paying for, not this one in particular: 9 of the 11 other email sending services grade higher. It costs $180 a year. What you could not make: Mail servers with a good name among inbox providers. Reading the reports inbox providers send about your domain. It plugs into other products, Zapier, WordPress and Stripe among them, and has an API. The depth: we grade its features B, which means it covers the whole job. This is a judgement from its listing. We have not built one.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Oct 18, 2026.