HEY vs Klaviyo Comparison (2026)

Compare HEY vs Klaviyo 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.Klaviyo

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.

Klaviyo

Power smarter digital relationships
"Power smarter digital relationships"
  • 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 userPricing$20/mo
100 GBStorageNo Klaviyo does not support storage
HEY does not use regular email attachments, which also prevents them from being encrypted with PGPAttachments0 MB
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI No
NoSMTPNo
NoIMAPNo
NoPOP3No
NoAPINo
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.
Photograph by Forward Email
Visit Website
Closed-source

Klaviyo

Klaviyo is a closed-source email service. Their official description reads: Power smarter digital relationships

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

Compare HEY with 78 email services