Proofpoint vs Heimdal Comparison (2026)

What are the differences between Proofpoint and Heimdal?

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 Proofpoint. We also support webmail: https://mail.forwardemail.net

Email Service Comparison

20 facts in comparison
Proofpointvs.Heimdal

Proofpoint

The leader in human-centric cybersecurity
"The leader in human-centric cybersecurity"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
vs.

Heimdal

One Platform. Total Security.
"One Platform. Total Security."
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
See Proofpoint plans (requires you to talk to a sales team) (according to a Reddit thread it may cost upwards of +$1000-2000 per month)PricingRequires you to talk to a sales team
UnknownStorageRequires 3rd party
150 MBAttachmentsUnknown
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI No
❌ Requires 3rd partySMTP❌ Requires 3rd party
❌ Requires 3rd partyIMAP❌ Requires 3rd party
❌ Requires 3rd partyPOP3❌ Requires 3rd party
YesAPIYes
NoE2EE No
NoOpenPGP No
NoWKD No

Email Service Screenshots

Closed-source

Proofpoint

Proofpoint is a closed-source email service. Their official description reads: The leader in human-centric cybersecurity

Proofpoint is a closed-source email service.
Photograph by Forward Email
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Closed-source

Heimdal

Heimdal is a closed-source email service. Its description from its website is: One Platform. Total Security.

Heimdal is a closed-source email service.
Photograph by Forward Email
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Compare Proofpoint with 78 email services