Gamma Group makes Intrusion, Phone Monitoring, Internet Monitoring, Monitoring Centre, Analysis, Audio Surveillance, Video Surveillance, Counter-Surveillance, Equipment, Monitoring Centres, Communications Monitoring, and Technical Surveillance technology. Their headquarters is in Andover. They have offices in United Kingdom.

Blue Coat makes Internet Monitoring and Analysis technology. Their headquarters is in Sunnyvale. They have offices in United States of America.

Nokia Siemens Networks makes Monitoring Centre, Phone Monitoring, Internet Monitoring, Location Monitoring, Monitoring Centres, and Communications Monitoring technology. Their headquarters is in Espoo. They have offices in Finland.