- Makh Shevet
 - Offering the Truster software package, a lie-detector test that can be used over the phone. - AntiPolygraph.org
- Nonprofit, public interest website dedicated to telling the truth about lie detectors that the polygraph operators don't want you to know.
- Polygraph Place, The
- Directory of examiners, schools, equipment, and more.
- Lie Busters
- Offers a variety of lie detector software and equipment.
- Truth or Lie
- Polygraph examination service that can perform the necessary tests right in your office.
- Matte Polygraph Service, Inc.
- Psychophysiological veracity examinations, testimony in court, consultations, and lectures.
- Decker Instrument
- Polygraph sales, services, and rentals.
- Tri-State Polygraph and Forensic Screening
- Offers test information and polygraph services for criminal cases, insurance and matrimonial disputes, and pre-employment tests.
- Maryland Institute of Criminal Justice Polygraph Training
- Provides polygraph services for legal, medical, civil and employee related areas.
- High Tech Lie Detectors
- Offering mini lie detectors.
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