Matter publishes its security, privacy and legal documentation on matterapp.com. This article is the index.
Subprocessors
Matter uses a small number of subprocessors to deliver the service, for example for hosting, email delivery and reward fulfillment. The current list, with each subprocessor's purpose and location, is kept at matterapp.com/legal/sub-processors.
Privacy and data processing
Security and compliance
Questions a security review needs answered that these pages do not cover? Email support@matterapp.com.