Documentation-based comparison
Mailjet versus Postmark
Compare documented scope and conditions. Unknowns remain unknown; different billing units do not establish a cost winner.
| Requirement | Mailjet | Postmark |
|---|---|---|
| Pricing | From $9/mo | From $15/mo |
| Who it is for | Email API, SMTP relay and webhooks, sold in plans that also cover marketing contacts and an email editor. Verified Oct 11, 2026 · Mailjet: official product and plan documentation | Sends transactional email and keeps bulk or broadcast email on separate Message Streams. Verified Oct 11, 2026 · Postmark: official product and plan documentation |
| Coverage limits | Unused emails do not roll over; they expire at the end of each billing cycle. Verified Oct 11, 2026 · Mailjet: official product and plan documentation | There is no tier between the free 100 emails a month and the 10,000-email paid tier. Verified Oct 11, 2026 · Postmark: official product and plan documentation |
| Sending volume |
| Unused emails do not roll over to the next billing period. Verified Oct 11, 2026 · Postmark: official product and plan documentation
|
| Sender domains | Not verified |
|
| Log retention | Not verified | Custom activity retention starts at USD 5 a month and is only available on Pro plans or higher; statistics are kept indefinitely. Verified Oct 11, 2026 · Postmark: official product and plan documentation
|
| Webhooks and events | APIs, SMTP relay and webhooks on Free and paid plans. Verified Oct 11, 2026 · Mailjet: official product and plan documentation | Inbound email is converted to JSON and posted to your webhook URL. Verified Oct 11, 2026 · Postmark: official product and plan documentation
|
| Dedicated IP | Premium: available on request from the 100,000-send tier. Verified Oct 11, 2026 · Mailjet: official product and plan documentation
| From USD 50 a month per IP, for accounts sending 300,000 or more emails a month on Pro or higher. Fully managed by Postmark. Verified Oct 11, 2026 · Postmark: official product and plan documentation |
| Support | Phone and chat support start from the 50k plans. The page does not say which plan names qualify. Verified Oct 11, 2026 · Mailjet: official product and plan documentation
| Support requests are handled by the customer success team through support tickets. The pricing page lists no support level per plan. Verified Oct 11, 2026 · Postmark support centre |
| Overage charges | You can keep sending after the plan's emails run out; extra emails are billed per 1,000, at a price the page text does not show. Verified Oct 11, 2026 · Mailjet: official product and plan documentation | Extra emails on paid plans are calculated at the end of the billing cycle and added to the next month's charge. Verified Oct 11, 2026 · Postmark: official product and plan documentation
|
| Coverage note | No daily sending limit. | Starting tier; unlimited emails per day. Not listed on the Basic card. |
