Zendesk vs Startmail Comparison (2025)

What are the differences between Zendesk and Startmail?

Forward Email Team
Written by
Forward Email TeamVerified
Published
7/1/25
Time to read
Less than 5 minutes
We recommend Forward Email as the best alternative to Zendesk.

Email Service Comparison

20 facts in comparison
Zendeskvs.Startmail

Zendesk

Unlock the power of customer experiences
"Unlock the power of customer experiences"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
vs.

Startmail

Private email you can trust
"Private email you can trust"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
$69/moPricing$7/mo
No Zendesk does not support storageStorage20 GB
50 MBAttachments25 MB
NoOpen-SourceNo
NoSandboxed Encryption ❌ Startmail claims to use a User Vault, but this statement has not been audited and their source code is closed-source
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI No
NoSMTPYes
NoIMAPYes
NoPOP3Yes
NoAPINo
NoE2EE ⚠️ Supported if both sender and recipient are using OpenPGP
NoOpenPGP ⚠️ Supports OpenPGP, but does not support WKD
NoWKD No

Email Service Screenshots

Closed-source

Zendesk

Zendesk is a closed-source email service. Its description from its website is: Unlock the power of customer experiences

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

Startmail

Startmail is a closed-source email service. According to their website: Private email you can trust

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

Compare Zendesk with 78 email services