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STO Investigations
“We will be using STO again in the future should we have occasion to require services in the Chicago area again.”
Best Private Investigators near Gary, IN
These agencies serve Gary from nearby bases in towns including Chicago, IL, Crown Point and Homewood, IL.
24 agencies listed · 9 open 24/7 · 18 open weekends · 18 rated 4.5+ · 11 show a license
Data verified October 18, 2026
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Lake County Civil Process
“Jay is the greatest to work with.”
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Peak Surveillance
“The people at Peak Surveillance did an awesome job helping me get the answers I needed to move forward with my case; I couldn't have asked for anything more!”
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Omega Global Security
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Northshore Process Service Network
- Price
- Efficient
- Case
“The team is not only sophisticated in handling investigative and process serving needs but also intimate enough to offer real-time updates on all case files, ensuring transparency and efficiency throughout the process.”
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On Q Professional Investigations
- Know
- Job
- Security
“Thank God for this instructor and his staff that really cares about the instruction of this type of work, the best place to learn, 5 star plus, also the Best instructor that i have encounter in my career.”
The 24 agencies on this page are the private investigators listed for Gary, IN. What each one states about its license, its specialties and the areas it covers comes from its own website; ratings and quotes come from public reviews.
Area overview: Gary, IN
The 24 agencies on this page are rated from 3.9 to 5.0 across 420 reviews; 2 have 50 or more reviews and 18 are rated 4.5 or higher. 9 are open around the clock; 18 are open on Saturdays and 12 on Sundays. 11 show a license on their websites and 4 have a BBB rating of A or A+. 18 have ten or more years of experience, the longest 42 years. 9 offer urgent consultations and 7 offer a free initial consultation. We have a website on file for all 24 of the agencies on this page; 22 publish a contact page; 19 list a public email and 1 takes bookings online. We count these figures across the agencies on this page; hours and prices change, so confirm the details with the agency before you book.
Which investigators listed for Gary describe their work online?
All 24 agencies on this page have a website on file. Those pages are where an agency states its license, the kinds of investigation it takes on, and whether it works mainly for attorneys, for companies or for private clients. That last point changes how a report gets written.
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Lawrence Ryan Investigations
- Company
- Job
“The process was completed entirely online through email, including the delivery of the summons and documents to be served, making the process quick and efficient.”
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RA Private Investigation & Security
- Team
- Information
- Money
“Evictions are not fun, however when you are backed up by fabulous staff members from RA Private Investigations, things always so well and I come out appreciating and respecting them even more than I did going into the situation.”
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PCI Investigations
“I would recommend it to anyone needing a PI whatever your case may be!”
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Chicago Executive Protection - Secure Options Consulting
- Team
- Mind
- Company
“Their responsiveness and adaptability have surpassed our expectations, and we wholeheartedly recommend Secure Options Consulting for top-tier security solutions.”
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Quality Professional Detective & Security Agency
“I would expect no less because I personally know the owner for over 20 years and formally worked side by side with him in a former career in law enforcement.”
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Confidential Protective Services
- Money
- Legal
- Patient
“Instructor Darras was very courteous, professional and has a wealth of knowledge regarding state and federal laws regarding the use of using and carrying firearms.”
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Lawdog Security & Investigations
- Respect
- Overtime
- Owner
“Working as a security guard for Law Dog gave me lots of opportunities to manage how I would like to work because you can choose to work more in a day by requesting it.”
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U.S. Security and Protective Services
“Always a great job...”
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Key Chicago Private Investigators
“Jeanne was very thoughtful in her preliminary questioning and then did a great job setting up a strategic plan of action; with excellent follow-through and timely updates.”
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Tatone Investigations
“Do yourself a favor and consult with Don immediately.....”
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Usia Private Security
“Excellent service.”
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Myers Service
“Hard working, diligent and thorough.”
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Courthouse Courier
“Great Job!!!!”
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Heritage Investigations & Surveillance
“I have worked with Adam Campbell over the last 34 years on complex personal injury and criminal cases and have never been disappointed by the quality of service and integrity of him and his company.”
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RGH Investigations - Chicago Private Investigator
“From interviewing witnesses to getting documents, police reports, medical records, (and anything else), Bob always comes through very quickly.”
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Ingenium Consulting Group
“Called Ingenium the took care of all the problems.”
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Vantius
“I had an urgent situation that was dealt with immediately and with excellent customer service.”
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Solved Security
“Dependable, reliable and unmatched security!”
Private Detective Services in Gary, IN Cost Estimates
Minimum cost
$335
Maximum cost
$10608
National Average
$1340
Avg Per Hour Rates
$140
$782
$2234
Typical price range is based on 388 cost profiles
Why these companies made our list
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