Defendant
1 case as defendant.
X1 Discovery, Inc. is a privately held software company headquartered in Pasadena, California, founded in 2003. It is an operating company of Idealab and is backed by U.S. Venture Partners. X1 has an estimated annual revenue of $22.1M to $36M and approximately 80 to 145 employees.
X1 Discovery develops and markets "index-in-place" data discovery software for enterprises and individual users. Their products, such as X1 Enterprise and X1 Search, enable rapid, unified search and collection across various data sources, including Microsoft 365 (Teams, OneDrive, SharePoint, Mail), other cloud data, laptops, desktops, and network file shares. These solutions are utilized for e-discovery, governance, risk, compliance (GRC), cyber risk assessment, and business productivity purposes. In March 2026, X1 released X1 Search v11, which incorporates AI-powered features for intelligent categorization, classification, and tagging of user data, while maintaining data security behind the corporate firewall.
X1 Discovery is an active two-way litigant in the patent landscape. They have appeared as a plaintiff in one tracked case and as a defendant in one tracked case. In late 2023, X1 Discovery, Inc. filed a lawsuit against Microsoft Corporation in the U.S. District Court for the Central District of California. Conversely, Microsoft Corporation initiated a case against X1 Discovery, Inc. at the Patent Trial and Appeal Board (PTAB).
A notable event for X1 Discovery was the divestiture of its X1 Social Discovery solution to Pagefreezer in December 2023. This strategic move allowed X1 to focus its investments and technological advancements on its core enterprise e-discovery and compliance solutions.
Microsoft Corporation, as Petitioner, challenged claims 1-20 of US patent 7370035, owned by X1 Discovery, Inc., in an Inter Partes Review at the Patent Trial and Appeal Board. The IPR has been instituted and is currently pending.