Companies / Customer.io / Mailgun
Does Customer.io use Mailgun?
Yes
We hold strong evidence for this.
- The company names it in its own subprocessor list, a statement that this vendor handles its customers' data.
How we know
About Customer.io
Customer.io is a customer engagement platform that unifies customer data, messaging, and AI. It serves brands that use it to send personalized messages across channels.
Summarized from its homepage on 3 Nov 2026.
What else Customer.io uses
Customer.io has evidence for 17 vendors. The strongest:
Amazon Web Services
Anthropic
Google Cloud
Infobip
OpenAI
Snowflake
Twilio
Cloudflare
Google Tag Manager
Other companies using Mailgun
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