Best Private Investigators near Chesterfield, MO
2 of these agencies are based in Chesterfield; the others serve Chesterfield from towns including St. Louis (18 mi), Clayton (13 mi) and Collinsville, IL (32 mi).
5 open 24/7 · 10 open weekends · 15 rated 4.5+ · 6 show a license
Data verified October 16, 2026
Working Security
St Louis Detectives
“He knows what he is talking about and has been doing this a long time.”
Goldkrupp
“We needed some very important documents signed and sent off by EOD and he was able to meet us, explain the process to us, and get us our notarized documents within the hour to send them off.”
Comfort Zone Security
“They have worked events for several of my companies, both past and present, including the American Drag Racing League, Fight Hard MMA, and the River City Raiders professional indoor football team.”
Gateway Investigations
“I had a great experience with Gateway Investigations at a very stressful point in life who provided research beyond just background checks, professional presentation dossier to be presented to the FBI/Missouri Attorney's office which resulted in a far better financial recovery than expected.”
The 19 agencies on this page are the private investigators listed for Chesterfield, MO. 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: Chesterfield, MO
16 of the 19 agencies on this page have a rating, from 3.8 to 5.0 across 295 reviews; 3 have 50 or more reviews and 15 are rated 4.5 or higher. The topics that come up most in reviews of the agencies on this page are "patient" and "price". 5 are open around the clock; 10 are open on Saturdays and 8 on Sundays. The services the agencies on this page list most often on their websites are investigative services (2), notary (2) and security services (2). 6 show a license on their websites and 5 have a BBB rating of A or A+. Domain records put 15 websites of the agencies on this page at ten or more years old; the oldest dates from 1997. 5 offer urgent consultations; 2 offer a free initial consultation and 1 lists coupons or special offers. We have a website on file for 18 of the agencies on this page; 15 publish a contact page; 14 list a public email and 1 takes bookings online. We count these figures across the agencies on this page; distances are straight-line, and hours and prices change, so confirm the details with the agency before you book.
Why are investigation agencies outside Chesterfield shown here?
2 of the 19 agencies have an address in Chesterfield. The others come from other towns. Investigators travel to the subject, so an office one county over is rarely the issue. State licensing is the thing to check.
Markell & Associates
“We have used the services of Markell & Associates for too many years to count.”
A-1 Private Investigations
Global Intelligence Consultants
“Within 6 days, their agents got the US Citizen out of jail and returned this individual to the United States, via private corporate jet.”
SRI
“Waited 4 mins and they called me back , helped me with actually what I needed and guided me to right 👍 results 🥰 …”
Captured Investigative Agency
The Whole Truth Investigative Group
Shadow Company Investigations
“I accidently called these guys by chance and after checking them out I would absolutely give them my business should the need arise.”
Special Services
Metro One Investigations
Kevin Sweet Investigations
Mc Dowell & Associates
Pyr-Tech
Henson Investigations
“I couldn't believe how quickly she responded to and completed my inquiry.”
Why these companies made our list
Is this page useful? Yes
No
Is there anything wrong with this page?
