Migadu vs Customer.io Comparison (2026)

What are the differences between Migadu and Customer.io?

Forward Email Team
Written by
Forward Email TeamVerified
Published
2/1/26
Time to read
Less than 5 minutes
We recommend Forward Email as the best alternative to Migadu. We also support webmail: https://mail.forwardemail.net

Email Service Comparison

20 facts in comparison
Migaduvs.Customer.io

Migadu

The Missing Email
"The Missing Email"
  • 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
$9/moPricing$100/mo
30 GBStorageNo Customer.io does not support storage
UnknownAttachments2 MB
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI No
YesSMTPYes
YesIMAPNo
YesPOP3No
NoAPIYes
⚠️ Not encryptedE2EE No
⚠️ Does not allow you to upload OpenPGP keyOpenPGP No
NoWKD No

Email Service Screenshots

Closed-source

Migadu

Migadu is a closed-source email service. Their website says: The Missing Email

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

Customer.io

Customer.io is a closed-source email service. According to their website: Send messages people actually want to receive using real-time customer data

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

Compare Migadu with 78 email services