X1 Discovery, Inc., previously known as X1 Technologies, Inc., is a privately held software company, based in Pasadena, California, United States, that develops and markets products for people and organizations that need to find information quickly.

X1 was founded in 2003, as X1 Technologies, Inc., to sell products that allow business users to access the information that resides on one computer or across the corporate enterprise.

In late 2005, X1 entered the enterprise search market with its Enterprise Edition, which consisted of a network-based indexing server that delivers results to the Desktop Edition (now X1 Search) or via a browser client interface.

In 2015 PCMag awards Editor's Choice to X1 for "Best Desktop Search" solution and Gartner names X1 a "Cool Vendor in Endpoint Computing".

X1 was listed as one of KMWorld's "100 Companies That Matter in Knowledge Management" for four years,[1] and as one of Gartner's "Cool Vendors in the High Performance Workplace" in 2006.