Offers services in locating electronic eavesdropping devices through electronic detection and manual inspection. Serves the Midwestern US.

Security consultants specialising in technical surveillance countermeasures, information security and corporate investigations. Based in Scotland.

Offer counter-surveillance sweep and inspection services. Details of services, equipment used and company background. Based in London, United Kingdom.

Manufacturer of counter surveillance electronics including harmonic receivers, junction detectors, bug and mobile phone detectors and cable checkers. Located in Corby, United Kingdom.

Technical surveillance countermeasure services. Bay City, Texas.

Offer counter-surveillance sweep services. Tools used, credentials and contact details. Based in New York, USA.

Assistance to business and government in the detection and nullification of electronic information theft and eavesdropping systems. Braselton, Georgia.

Telecommunications security, counterintelligence, and security consulting. Based in Massachusetts.

Electronic counter measures sweeps in the United Kingdom.

Offer counter-surveillance sweep services and training. Information on approach and results of previous investigations. Mississauga, Ontario, Canada.

Eavesdropping detection and counterespionage consulting services. Includes espionage newsletter archive and downloadable guidance on security and bug detection. Based in Oldwick, New Jersey, USA.

Offer training in how to conduct counter-surveillance investigations. Also design and manufacture electronic countermeasure equipment. Based in Algood, Tennessee, USA.

Counter-surveillance sweep services. Also offer various electronic surveillance, counter-surveillance and protective equipment. Based in Purley, Surrey, United Kingdom.

Services in the areas of electronic countermeasures and protection of proprietary information, training and seminars. Carrollton, Georgia.

Training law enforcement in electronic and high-technology crime.

Debugging and eavesdropping detection training and services. Based in South Africa.

Security consulting service dedicated to the detection of eavesdropping and electronic surveillance.