Heimdal vs mailbox.org Comparison (2026)

Compare Heimdal vs mailbox.org email services. In-depth analysis of features, pricing, security, privacy, and storage to find the best email provider for your needs.

Forward Email Team
Written by
Forward Email TeamVerified
Published
4/1/26
Time to read
Less than 5 minutes
We recommend Forward Email as the best alternative to Heimdal. We also support webmail: https://mail.forwardemail.net

Email Service Comparison

20 facts in comparison
Heimdalvs.mailbox.org

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
vs.

mailbox.org

Privacy made in Germany
"Privacy made in Germany"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
Requires you to talk to a sales teamPricing€3/mo
Requires 3rd partyStorage10 GB
UnknownAttachments100 MB
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI No
❌ Requires 3rd partySMTPYes
❌ Requires 3rd partyIMAPYes
❌ Requires 3rd partyPOP3Yes
YesAPINo
NoE2EE No
NoOpenPGP Yes
NoWKD Yes

Email Service Screenshots

Closed-source

Heimdal

Heimdal is a closed-source email service. Their official description reads: One Platform. Total Security.

Heimdal is a closed-source email service.
Photograph by Forward Email
Go to site
Closed-source

mailbox.org

mailbox.org is a closed-source email service. Their website says: Privacy made in Germany

mailbox.org is a closed-source email service.
Photograph by Forward Email
Visit Website

Compare Heimdal with 78 email services