Byrna Technologies Inc., a less-lethal defense technology company, develops and manufactures less-lethal munitions. The company offers a Byrna line of handheld personal security devices, including the Byrna HD, a .68 caliber handheld personal security device that is designed to be used by civilians and private security professionals, as well as Byrna HD magazines, launchers, and projectiles. It operates in the United States, Canada, and South Africa. The company was formerly known as Security Devices International, Inc. and changed its name to Byrna Technologies Inc. in March 2020. Byrna Technologies Inc. was incorporated in 2005 and is headquartered in Andover, Massachusetts.