Postmark
www.postmark.com/pricingTransactional senderemail/postmarkJSONcomparereport an errorprovider JSON
- Free allowance
- 100 emails/month on the free Developer tier, which does not expire
- Verdict
- fails: quotathe free allowance is too small to matter
- Cost
- free tier
- Identity
- emailno card, no phone
- Binding limit
- request-rate100 emails per month with no daily allowance beyond it
- Evidence
- documented17 sources; a first-party page was read and the sentence quoted
- Freshness
- stale on 2026-12-05checked 2026-11-04 (live); stale on 2026-12-05
| Free tier | 100 emails/month on the free Developer tier, which does not expire unit requests; metered on request-count |
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| Price | none stated |
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| Limits | - request-rate (binding) 100 emails per month with no daily allowance beyond it source
- write-gated until Postmark approves a new account, it sends only to addresses on domains added to the account and verified; review takes under 24 hours on weekdays source
no daily allowance exists: 100 emails per month is the whole month, which is 3.3 a day averaged. A verified sender signature or domain is required and a card is not |
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| Identity | email an account with an email address; no credit card for the free Developer plan |
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| Egress | not applicable: an outbound sender |
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| Retention | 45 days of activity retention (45 days) |
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| Interface | rest https://api.postmarkapp.com/email; an SMTP relay at smtp.postmarkapp.com for transactional messages and smtp-broadcasts.postmarkapp.com for broadcast messages, on ports 25, 2525 and 587 with STARTTLS |
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| Tooling | curl, any HTTP client, any SMTP client |
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| Composes with | composes with a domain and with nothing else at this volume. |
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| Reliability | no overage on the free tier |
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| Notes | There is no burst room at all, which distinguishes it from every 100/day product here. |
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| Parsed numbers | - has-free-tier 1
- write-gated 24 hours
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Evidence 17
More fields 1