Postmark
- Free tier
- Yes
- Limits tracked
- 4
- Last checked
- Last change
- None recorded
- Source
- postmarkapp.com/pricing
Affiliate link. It never changes the numbers or the order.
What the free tier includes
Each number is copied from postmarkapp.com as it read on Oct 23, 2026. Open a quote to see the exact sentence.
| Limit | Free amount | Source |
|---|---|---|
| Custom domainsYour own domains you can connect | 10 | postmarkapp.comchecked Oct 23 Show the quote…Up to 10 servers Unlimited Custom sending domains Up to 10 domains Up to 5 domains Up to 10 domains Unlimited… |
| Emails per monthMessages you can send | 100 emails / mo | postmarkapp.comchecked Oct 23 Show the quote…starts on our free Developer plan, which includes 100 emails every month. And it never expires or runs out.… |
| Data retentionHow long data is kept | 45 days | postmarkapp.comchecked Oct 23 Show the quote…Detailed Activity Retention Full message retention 45 Days 45 Days 45 Days Custom retention available as add-on… |
| Team membersPeople on the account | 6 | postmarkapp.comchecked Oct 23 Show the quote…API permission controls Users Number of Users Up to 6 users Up to 4 users Up to 6 users Unlimited users… |
Postmark next to other email sending
The same limits for 7 services in this category. Postmark is the highlighted row.
| Service | Custom domains | Data retention | Emails per month | Team members | Source |
|---|---|---|---|---|---|
| Postmark This page | 10 | 45 | 100 | 6 | postmarkapp.comchecked Oct 23 |
| Brevo | not published | not published | not published | 1 | brevo.comchecked Oct 23 |
| MailerSend | 1 | 1 | 500 | 1 | mailersend.comchecked Oct 22 |
| Mailgun | 1 | 1 | not published | not published | mailgun.comchecked Oct 22 |
| Mailtrap | 1 | 3 | 4,000 | 1 | mailtrap.iochecked Oct 22 |
| Resend | 3 | 30 | 3,000 | not published | resend.comchecked Oct 23 |
| Twilio SendGrid Trial only | not published | not published | not published | not published | twilio.comchecked Oct 22 |
Embed
A badge with the free-tier value, updated whenever TierDiff rebuilds. It links back to this page.
Markdown
[](https://tierdiff.com/p/postmark/)HTML
<a href="https://tierdiff.com/p/postmark/"><img src="https://tierdiff.com/badge/postmark.svg" alt="Postmark free tier on TierDiff" height="20"></a>Badges for one limit: Team members, Emails per month, Data retention, Custom domains
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