Gandi vs Customer.io Comparison (2026)

Compare Gandi vs Customer.io 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 Gandi. We also support webmail: https://mail.forwardemail.net

Email Service Comparison

20 facts in comparison
Gandivs.Customer.io

Gandi

We manage over 780,000 email addresses on our email servers, why not yours?
"We manage over 780,000 email addresses on our email servers, why not yours?"
  • 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
$3.99/moPricing$100/mo
10 GBStorageNo Customer.io does not support storage
25 MBAttachments2 MB
NoOpen-SourceNo
NoSandboxed Encryption No
NoUnlimited DomainsNo
NoUnlimited AliasesNo
NoTTI No
YesSMTPYes
YesIMAPNo
YesPOP3No
NoAPIYes
NoE2EE No
NoOpenPGP No
NoWKD No

Email Service Screenshots

Closed-source

Gandi

Gandi is a closed-source email service. According to their website: We manage over 780,000 email addresses on our email servers, why not yours?

Gandi 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.
Photograph by Forward Email
Visit Website

Compare Gandi with 78 email services