Klaviyo vs ActiveCampaign Comparison (2025)

What are the differences between Klaviyo and ActiveCampaign?

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.ActiveCampaign

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.

ActiveCampaign

Postmark, the leading service for transactional email, is now part of ActiveCampaign
"Postmark, the leading service for transactional email, is now part of ActiveCampaign"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
$20/moPricing$15/mo
No Klaviyo does not support storageStorageNo ActiveCampaign does not support storage
0 MBAttachments10 MB
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI TTI
NoSMTPYes
NoIMAPNo
NoPOP3No
NoAPIYes
NoE2EE No
NoOpenPGP No
NoWKD No

Email Service Screenshots

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
Go to site
Closed-source

ActiveCampaign

ActiveCampaign is a closed-source email service. Their website says: Postmark, the leading service for transactional email, is now part of ActiveCampaign

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

Compare Klaviyo with 78 email services