Best Private Investigators near Plainfield, IL

1 of these agencies is based in Plainfield; the others serve Plainfield from towns including Naperville (9 mi), Joliet (8 mi) and Burr Ridge (18 mi).

3 open 24/7 · 9 open weekends · 17 rated 4.5+ · 10 show a license

Data verified October 18, 2026

Uthe Investigations & Process Service

Uthe Investigations & Process Service

(10)
  • Team
“Overall, I was given options, I inquired on their fees if I should choose to utilize their services after law enforcement intervention and walked away feeling informed and ready to handle my scenario knowing I could count on Uthe & Uthe should the ne...”
Licensed
30+ Years Experience
Transparent Fees & Pricing
2314 Illinois Rte 59 #204, Plainfield, IL 60586
i
Chicago Intel Agency

Chicago Intel Agency

(50)
  • Job
  • Individual
  • Information
“He has demonstrated not only a high level of competence but also a caring and understanding approach that made a significant difference in my experience.”
Licensed
In Business Since 2015
Emergency Services
2364 Essington Rd Suite 504, Joliet, IL
i
Great Lakes Professional Investigations

Great Lakes Professional Investigations

(13)
“I have had the pleasure of knowing Jacob and GLPI for almost a decade and to see the passion that he has for the work he does; in the industry is a huge positive in my book.”
Licensed
In Business Since 2011
1212 S Naper Blvd #119, Naperville, IL
i
RM Global Security Consultants

RM Global Security Consultants

(1)
“RM Global Security did a fantastic on my security job.”
Licensed
In Business Since 2019
1755 Park St Suite 200, Naperville, IL
i
Krimson Investigations and Process Service

Krimson Investigations and Process Service

(9)
  • Company
  • Sheriff
  • Prices
“The staff was prompt, kept me abreast of each step in the process and fees were the best I'd paid for similar service (with another server) in the last year.”
Licensed
In Business Since 2021
Serving Plainfield Area
i
Squad 8-B Solutions

Squad 8-B Solutions

(1)
“You have all the mutual respect”
In Business Since 2015
1212 S Naper Blvd # 119, Naperville, IL
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The 24 agencies on this page are the private investigators listed for Plainfield, IL. 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: Plainfield, IL

21 of the 24 agencies on this page have a rating, from 3.8 to 5.0 across 247 reviews; 1 has 50 or more reviews and 17 are rated 4.5 or higher. 3 are open around the clock; 9 are open on Saturdays and 5 on Sundays. 10 show a license on their websites and 2 have a BBB rating of A or A+. Domain records put 17 websites of the agencies on this page at ten or more years old; the oldest dates from 1997. 3 offer urgent consultations and 2 offer a free initial consultation. We have a website on file for 21 of the agencies on this page; 14 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.

Do investigators listed for Plainfield discuss a case free?

2 of the 24 agencies state that a first consultation costs nothing. Use it to describe the problem and hear whether the work can be done lawfully at all. A straight agency will sometimes tell you on that call that what you want cannot be obtained, which saves you a retainer.

Impact Investigations

Impact Investigations

Licensed
In Business Since 2000
Emergency Services
Serving Plainfield Area
i
Barrister Investigations & Filing Service

Barrister Investigations & Filing Service

(4)
“They have great customer service and quick turnaround.”
212 N Chicago St, Joliet, IL
i
Cash Private Detectives

Cash Private Detectives

In Business Since 2020
Serving Plainfield Area
i
Lawrence Ryan Investigations

Lawrence Ryan Investigations

(23)
  • 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.”
Emergency Services
In Business Since 2016
Serving Plainfield Area
i
Quality Professional Detective & Security Agency

Quality Professional Detective & Security Agency

(2)
“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.”
Licensed
In Business Since 2018
Serving Plainfield Area
i
Confidential Protective Services

Confidential Protective Services

(21)
  • Company
  • Instructor
  • 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.”
In Business Since 2000
Serving Plainfield Area
i
Forest Security

Forest Security

(15)
  • Contract
  • System
  • Job
“Made some recommendations for fire and flood protection, which we were already looking into, and helped with a takeover of the system with only a 2 year contract compared to 3-5 years for many other companies.”
Licensed
5+ Years Experience
Free Initial Consultation
Serving Plainfield Area
i
Solved Security

Solved Security

(1)
“Dependable, reliable and unmatched security!”
In Business Since 2015
5039 W, Ogden Ave, Cicero, IL
i
Edward R Kirby & Associates

Edward R Kirby & Associates

(1)
“They are honest as the day is long and they will give it their all to solve your problem.”
100+ Years Experience
Serving Plainfield Area
i
Larsen Forensics

Larsen Forensics

Free Initial Consultation
In Business Since 2006
Serving Plainfield Area
i
Judicial Attorney Services

Judicial Attorney Services

(1)
“Of course, there are times when the subject becomes uncooperative and service cannot be made, but I love that this company gives you the flexibility to go out whenever you can to get the job done right which in turn, increases the chance of your work...”
Licensed
In Business Since 2007
Serving Plainfield Area
i
Illinois Protection & Investigation

Illinois Protection & Investigation

Licensed
In Business Since 2016
Serving Plainfield Area
i
Capital Security & Investigations

Capital Security & Investigations

BBB Rating: A+
In Business Since 2001
Accepts All Major Credit Cards
Serving Plainfield Area
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Argus Services

Argus Services

In Business Since 1999
Serving Plainfield Area
i
Viper Detective Agency

Viper Detective Agency

(1)
“Sally keeps you updated throughout the process.”
In Business Since 2006
Serving Plainfield Area
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VTS Investigations

VTS Investigations

Transparent Fees & Pricing
In Business Since 1984
Serving Plainfield Area
i
Force Process Serving & Investigations

Force Process Serving & Investigations

(1)
“Hunting Down the Hardest for you.”
Serving Plainfield Area
i
Delorto Mazzola & Associates

Delorto Mazzola & Associates

In Business Since 2000
Serving Plainfield Area
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Private Detective Services in Plainfield, IL Cost Estimates

Minimum cost
$300
Maximum cost
$9500
National Average
$1200
Avg Per Hour Rates
$125
$700
$2000
Average price range is based on 308 cost profiles
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Average Cost $1200
Minimum cost $300
Maximum cost $9500
Avg Per Hour Rates $125

Average range $700 to $2000 is based on 308 cost profiles.

Why these companies made our list

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