X1 Search is a search product from X1 Discovery for email, chats, attachments, local and cloud files and Microsoft 365 data in a single search. Alongside the edition for personal and business use, X1 Enterprise offers search for eDiscovery and information governance, searching data in place and running targeted collections without moving it. According to X1, the software builds its index locally or on infrastructure that the customer controls.
X1 Discovery, Inc. is a privately held company in Pasadena, California, and is subject to US jurisdiction. In its privacy policy X1 is the data controller and states that it processes and stores information in the United States; the policy also contains a section on GDPR rights for data subjects. The privacy policy does not mention a data processing agreement. Because the search index stays with the customer, exposure is limited to data that X1 itself receives, such as diagnostic data and support requests. For European organisations this matters when assessing data flows to the US.