What the evidence answers

A reading of reviewed official documentation for Brevo Transactional Email and Postmark. It is not a hands-on test, a ranking or a recommendation of one product.

Price

  • Brevo Transactional Email From $9/mo
    • Free: no subscription charge
    • Starter: $9.00 monthly
    • Standard: $18.00 monthly
    • Professional: $499.00 monthly
    • Enterprise: Vendor quotation required
  • Postmark From $15/mo
    • Free: no subscription charge
    • Basic: $15.00 monthly
    • Pro: $16.50 monthly
    • Platform: $18.00 monthly
    • High volume: Vendor quotation required

Both list prices on the same basis. Compare what each plan includes; the lower amount alone does not make the better choice.

Documented for both

Sending volume
Brevo Transactional Email Plans are priced on emails sent; contact-based pricing applies only to marketing features.Free: 300 emails per dayStarter: 5,000 emails per monthStandard: 5,000 emails per monthProfessional: 150,000 emails per month
Postmark Unused emails do not roll over to the next billing period.Free: 100 emails per monthBasic: 10,000 emails per monthPro: 10,000 emails per monthPlatform: 10,000 emails per month
Log retention
Brevo Transactional Email Flexible log retention is advertised; a numeric retention window is not stated on this page.
Postmark Custom activity retention starts at USD 5 a month and is only available on Pro plans or higher; statistics are kept indefinitely.Basic: 45 daysPro: Customizable up to 365 days; 45 days by defaultPlatform: Customizable up to 365 days; 45 days by default
Webhooks and events
Brevo Transactional Email Event webhooks and real-time tracking are listed.Free: Webhook support included
Postmark Inbound email is converted to JSON and posted to your webhook URL.Pro: Inbound email processing includedPlatform: Inbound email processing included
Dedicated IP
Brevo Transactional Email Dedicated IPs with custom warming schedules are offered to high-volume senders; no price is published.Enterprise: Dedicated IPs are part of the custom Enterprise plan
Postmark From USD 50 a month per IP, for accounts sending 300,000 or more emails a month on Pro or higher.
Support
Brevo Transactional Email Free: Email supportStarter: Email support in 6 languagesProfessional: Phone support plus 3 hours a year with a deliverability specialistEnterprise: Tailored onboarding and CSM support
Postmark Support requests are handled by the customer success team through support tickets.
Overage charges
Brevo Transactional Email Pay-as-you-go email credits are an alternative to a plan: they do not expire and one email uses one credit.
Postmark Extra emails on paid plans are calculated at the end of the billing cycle and added to the next month's charge.Free: No overages are allowed on Free.

Limits to check

  • Brevo Transactional Email Attachments are limited to 25 MB per email, and one API request can batch up to 1,000 emails.
  • Postmark There is no tier between the free 100 emails a month and the 10,000-email paid tier.

Not verified yet

Every compared requirement has evidence for at least one.

Documented for one product only, shown in the table below: Postmark: sender domains.

Not verified means our reviewed sources do not establish it. It does not mean a product lacks the capability or that it costs nothing.

Next steps

  • Ask Brevo Transactional Email about sender domains; our sources do not establish it yet.
Documented scope and limits; unverified dimensions remain unknown.
RequirementBrevo Transactional EmailPostmark
Pricing
Who it is for
Transactional email sent by API or SMTP from your application, inside an all-in-one platform that also runs marketing campaigns.

Verified Oct 11, 2026 · Brevo Transactional Email: 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
Attachments are limited to 25 MB per email, and one API request can batch up to 1,000 emails.

Verified Oct 11, 2026 · Brevo Transactional Email: 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
Plans are priced on emails sent; contact-based pricing applies only to marketing features.

Verified Oct 11, 2026 · Brevo Transactional Email: official product and plan documentation

  • Free 300 emails per day
  • Starter 5,000 emails per month
  • Standard 5,000 emails per month
  • Professional 150,000 emails per month
Unused emails do not roll over to the next billing period.

Verified Oct 11, 2026 · Postmark: official product and plan documentation

  • Free 100 emails per month
  • Basic 10,000 emails per month
  • Pro 10,000 emails per month
  • Platform 10,000 emails per month
Sender domainsNot verified
  • Free 10 custom sending domains
  • Basic 5 custom sending domains
  • Pro 10 custom sending domains
  • Platform Unlimited custom sending domains
Log retention
Flexible log retention is advertised; a numeric retention window is not stated on this page.

Verified Oct 11, 2026 · Brevo Transactional Email: official product and plan documentation

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

  • Basic 45 days
  • Pro Customizable up to 365 days; 45 days by default
  • Platform Customizable up to 365 days; 45 days by default
Webhooks and events
Event webhooks and real-time tracking are listed.

Verified Oct 11, 2026 · Brevo Transactional Email: official product and plan documentation

  • Free Webhook support included
Inbound email is converted to JSON and posted to your webhook URL.

Verified Oct 11, 2026 · Postmark: official product and plan documentation

  • Pro Inbound email processing included
  • Platform Inbound email processing included
Dedicated IP
Dedicated IPs with custom warming schedules are offered to high-volume senders; no price is published.

Verified Oct 11, 2026 · Brevo Transactional Email: official product and plan documentation

  • Enterprise Dedicated IPs are part of the custom Enterprise plan
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
  • Free Email support
  • Starter Email support in 6 languages
  • Professional Phone support plus 3 hours a year with a deliverability specialist
  • Enterprise Tailored onboarding and CSM support
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
Pay-as-you-go email credits are an alternative to a plan: they do not expire and one email uses one credit.

Pay-as-you-go does not include phone support; the credit price is not shown.

Verified Oct 11, 2026 · Brevo: official pricing page

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

  • Free No overages are allowed on Free.
Coverage note

Starting volume.

Starting tier; unlimited emails per day.

Not listed on the Basic card.

Choose two or three products.