Postmark vs Darktrace Comparison (2026)

What are the differences between Postmark and Darktrace?

Forward Email Team
Written by
Forward Email TeamVerified
Published
2/1/26
Time to read
Less than 5 minutes
We recommend Forward Email as the best alternative to Postmark. We also support webmail: https://mail.forwardemail.net

Email Service Comparison

20 facts in comparison
Postmarkvs.Darktrace

Postmark

The email delivery service that people actually like
"The email delivery service that people actually like"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
vs.

Darktrace

Cyber security that learns you
"Cyber security that learns you"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
$15/moPricingRequires you to talk to a sales team (according to Amazon AWS Marketplace it may cost upwards of $30,000/mo)
No Postmark does not support storageStorageRequires 3rd party
10 MBAttachmentsUnknown
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
TTI TTI No
YesSMTP❌ Requires 3rd party
NoIMAP❌ Requires 3rd party
NoPOP3❌ Requires 3rd party
YesAPIYes
NoE2EE No
NoOpenPGP No
NoWKD No

Email Service Screenshots

Closed-source

Postmark

Postmark is a closed-source email service. Their website says: The email delivery service that people actually like

Postmark is a closed-source email service.
Photo by Forward Email
Visit Website
Closed-source

Darktrace

Darktrace is a closed-source email service. According to their website: Cyber security that learns you

Darktrace is a closed-source email service.
Screenshot by Forward Email
Visit Website

Compare Postmark with 78 email services