HEY vs Mimecast Comparison (2026)

Compare HEY vs Mimecast 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 HEY. We also support webmail: https://mail.forwardemail.net

Email Service Comparison

20 facts in comparison
HEYvs.Mimecast

HEY

We finally fixed your email + calendar!
"We finally fixed your email + calendar!"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
vs.

Mimecast

Email & Collaboration Security
"Email & Collaboration Security"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
$99/yr + $12/mo per userPricingSee Mimecast plans (requires you to talk to a sales team) (according to a Reddit thread it may cost upwards of +$1000-2000 per month)
100 GBStorageUnknown
HEY does not use regular email attachments, which also prevents them from being encrypted with PGPAttachments200 MB
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI No
NoSMTP❌ Requires 3rd party
NoIMAP❌ Requires 3rd party
NoPOP3❌ Requires 3rd party
NoAPIYes
NoE2EE No
NoOpenPGP No
NoWKD No

Email Service Screenshots

Closed-source

HEY

HEY is a closed-source email service. Their official description reads: We finally fixed your email + calendar!

HEY is a closed-source email service.
Photo by Forward Email
Go to site
Closed-source

Mimecast

Mimecast is a closed-source email service. Its description from its website is: Email & Collaboration Security

Mimecast is a closed-source email service.
Screenshot by Forward Email
Go to site

Compare HEY with 78 email services