Legal

List of Subprocessors

Revised March 2026

Below is a list of subprocessors we work with and the purpose for why we use their services.

Customer.io Infrastructure Subprocessors

Subprocessor	Purpose	Location	More info
Amazon Web Services	Cloud Hosting	USA, EU	https://aws.amazon.com
Google Cloud Platform	Cloud Hosting, Analytics, AI	USA, EU	https://cloud.google.com
Snowflake	Data Warehousing, Analytics	USA, EU	https://www.snowflake.com

Customer.io AI Feature Subprocessors

These subprocessors are enabled by default within the Customer.io platform. Customers may disable "Customer.io AI" at any time in their Account Settings. Once disabled, no further Customer Data will be shared with these subprocessors.

Subprocessor	Purpose	Location	More info
OpenAI, LLC	AI model inference for optional AI-powered features	USA, EU	https://openai.com/policies/services-agreement
Google Cloud (Vertex AI)	AI model hosting and inference for optional AI-powered features	USA, EU	https://cloud.google.com/terms/service-terms
Anthropic (Claude)	AI model hosting and inference for optional AI-powered features	USA	https://www.anthropic.com/legal/commercial-terms

Customer.io Platform Subprocessors

Subprocessor	Purpose	Location	More info
Mailgun	Customer Communications	USA, EU	https://www.mailgun.com
Twilio	Customer Communications*	USA	https://www.twilio.com/en-us/legal/tos

*This platform subprocessor is only applicable to customers who have contracted for SMS services.

For more information or to subscribe to notifications of updates, please email gdpr@customer.io.

If you would like to read about our data handling practices you can find more information in our Privacy Policy.