Intercom vs Customer.io Comparison (2025)

What are the differences between Intercom and Customer.io?

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 Intercom.

Email Service Comparison

20 facts in comparison
Intercomvs.Customer.io

Intercom

The only AI customer service solution you need
"The only AI customer service solution you need"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
vs.

Customer.io

Send messages people actually want to receive using real-time customer data
"Send messages people actually want to receive using real-time customer data"
  • Hardenize Test
  • Internet.nl Site Test
  • Internet.nl Mail Test
  • Mozilla HTTP Observatory Grade
  • Qualys SSL Labs SSL Server Test
$39/moPricing$100/mo
No Intercom does not support storageStorageNo Customer.io does not support storage
20 MBAttachments2 MB
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI No
NoSMTPYes
NoIMAPNo
NoPOP3No
❌ See blog postAPIYes
NoE2EE No
NoOpenPGP No
NoWKD No

Email Service Screenshots

Closed-source

Intercom

Intercom is a closed-source email service. Their website says: The only AI customer service solution you need

Intercom is a closed-source email service.
Screenshot by Forward Email
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Closed-source

Customer.io

Customer.io is a closed-source email service. Their official description reads: Send messages people actually want to receive using real-time customer data

Customer.io is a closed-source email service.
Photograph by Forward Email
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Compare Intercom with 78 email services