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Allen Investigative Services Metro Atlanta's leading private investigators believe you deserve to know the truth!

Is your spouse being faithful? Committing marital adultery? Cheating?
Do you need help with a child custody or divorce case?
Is your car, office or home bugged with illegal listening devices?
Is your vehicle or your child's vehicle being tracked by a GPS device?
Do you need a team of executive protection specialists?
Do you have an employee theft issue? Embezzlement?
Have you been threatened by an employee?
Have you been the victim of insurance fraud? Worker's comp?
Would you like to know the location of a missing person?
Do you wonder about someone's background including any criminal history?

Allen Investigative Services, Inc. consists of a team of expertly trained, licensed professionals specializing in discreet, confidential corporate and domestic investigations and surveillance. We are the best, most experienced private detective agency in Georgia, operating in and around the Atlanta metro area. We serve clients in Marietta, Dunwoody, Sandy Springs, Brookhaven, Roswell, Duluth, and Alpharetta, among others. However, our Global Satellite Tracking (GPS) extends nationwide.

Whether your needs are focused asset location, adultery, or merely needing a background check, we have the skills, training, and high tech equipment to get the job done. Evidence we have collected has proven to be invaluable in divorce, custody, employee theft, insurance fraud, and labor strike situations.

We will testify on your behalf in any Federal, State, Superior or Magistrate Court. Our mission is to provide state of the art services and investigations in a private, prompt manner. The team at Allen Investigative Services, Inc. understands that a private investigation produces more then just evidence. We also provide peace of mind and security while satisfying the need to know.

From Lawrenceville to Douglasville, and Cumming to Jonesboro, we are available twenty four hours a day. Call the agency that has been meeting the needs of clients throughout the metro Atlanta area, and worldwide, since 1986.

Call us today for a free confidential consultation at 770-924-7200 or 770-977-0404.
Highlights and features
  • All types of surveillance and investigations
Associations and certifications
  • Georgia Association of Professional Private Investigators (GAPPI)
Services
Allen Investigative Services, Inc. consists of a team of expertly trained, licensed professionals specializing in discreet, confidential corporate and domestic investigations and surveillance. We are the best, most experienced private detective agency in Georgia, conducting investigations in and around the Atlanta metro area.
Allen Investigative Services, Inc. is a professional, highly skilled, full service Atlanta-based private investigative agency. We have private investigators with surveillance and investigative experience since 1973. Our professional male and female staff are experts in problem solving in civil/domestic, criminal and corporate investigations, as well being able to provide executive protection.
The Global Positioning System (GPS) is a worldwide radio-navigation system formed by 24 orbiting satellites and their ground stations. Launched and maintained by the U.S. Department of Defense, these satellites send a stream of signals to the earth's surface enabling a GPS receiver to calculate accurate positions within 10 feet or less.
Our Private Investigators are based in and around the State of Georgia, but most of our work is performed within a fifty mile radius of Atlanta. Some cases start out around the Atlanta area without the final destination in mind or even known by the investigative team and can end up thousands of miles away.
Reviews (10)
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Chris Woodward
Dec 23, 2020
I have had a few interactions with the owner and he has been very easy to work with and is always responsive. No matter what the situation, he has been extremely easy to work with and always provides the information needed and requested. Definitely someone you can turn to for assistance getting to the bottom of things, and TRUST.
Mr. Alton L. Bowen
Apr 06, 2020
Their productive, and their not prejudice. Happy New Years Allen & Allen.
Theresa Brisentine
Feb 02, 2019
Called me back right away. Very hands-on and thorough. Would recommend to anyone!
Theresa B.
Jul 10, 2018
I would recommend this PI for any of your needs. Wonderful! Very helpful and thorough. Response time is spot on.
Frank James
Jun 30, 2017
I have been using Mark Allen with Allen Investigative Services on and off for the past 15 years. He has always produced fantastic results. Allen Investigative Services is the best in the business. Mark has knowledge of the private investigative business that no others in this area have. I highly recommend his services to anyone who is in need of information.
Jan Pazdur
Dec 26, 2016
A great company, did the job right and at a fair price. Would definitely recommend Allen Investigative. I thought my husband was cheating and they found out he was. I was impressed with the 24 hour availability of the owner.
Anne Stotts
Jun 16, 2016
I hired this agency trying to get evidence against my husband. I had previously tried another agency who was less expensive and I guess you get what you pay for because I got nothing. Allen Investigative got me what I needed right away. I got video tape, a professional report and my attorney was thrilled with their finished product. You get what you pay for and in this case every dollar was worth it in the outcome of my divorce!
Royce
Nov 29, 2015
The communication with this company was outstanding. As they were following my wife, mainly in the late evening hours, of course I needed to know what results they were documenting. I called as late as 2:00 a.m. and they answered the phone and kept me informed. I highly recommend this agency. This agency is good, real good!
Andrea Fetzko
Nov 06, 2015
This agency is the best! I hired them to find out if my husband was cheating and they got me an answer complete with video and a report. They were the real deal. I have tried others who came up with nothing but Allen Investigative Services got the job done. They did what they said they would in a timely manner and kept in constant contact, providing me with updates on my case. Definitely better than the rest!
Greg Walker
Jan 03, 2015
I retained Allen Investigative Services for a personal matter and the services I received were top notch! I was unsure of what to expect. All my expectations were meet and then some. I felt confident about their professional manner and secure with the delicate circumstances that were at hand. I whole heartily recommend this company to anyone needing any of the services they offer. Thanks for all the support and efforts provided from their team! G. Walker