LaCie (/lɑːˈsiː/; English: “The Company”) is an American-French computer hardware company specializing in external hard drives, RAID arrays, optical drives, Flash Drives, and computer monitors. The company markets several lines of hard drives with a capacity of up to many terabytes of data, with a choice of interfaces (FireWire 400, FireWire 800, eSATA, USB 2.0, USB 3.0, Thunderbolt, and Ethernet). LaCie also has a series of mobile bus-powered hard drives.

LaCie’s computer display product line is targeted specifically to graphics professionals, with an emphasis on color matching.