Klaviyo vs Abnormal Security Comparison (2025)

What are the differences between Klaviyo and Abnormal Security?

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 Klaviyo.

Email Service Comparison

20 facts in comparison
Klaviyovs.Abnormal Security

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
vs.

Abnormal Security

Cloud Email Security - Block Malicious Email Attacks
"Cloud Email Security - Block Malicious Email Attacks"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
$20/moPricingRequires you to talk to a sales team
No Klaviyo does not support storageStorageRequires 3rd party
0 MBAttachmentsUnknown
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

Klaviyo

Klaviyo is a closed-source email service. According to their website: Power smarter digital relationships

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

Abnormal Security

Abnormal Security is a closed-source email service. Their official description reads: Cloud Email Security - Block Malicious Email Attacks

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

Compare Klaviyo with 78 email services