Best Private Investigation Service in Chicago

Handpicked Top 3 Private Investigation Service in Chicago, Illinois. They face a rigorous 50-Point Inspection, which includes customer reviews, history, complaints, ratings, satisfaction, trust, cost and general excellence. You deserve the best!


3004 West Belmont Avenue, Chicago, IL 60618

Since 2011

Asset, Criminal, Civil, Child Custody and Divorce Investigations, Counter Surveillance, Background Check, Fingerprinting, Missing Person, Process Servers, Security Guard, Worker's Compensation, Nationwide Skip Trace, Video Surveillance, Witness Protection, Computer & Phone Forensics

Enhance the depth and quality of the distinct products and services provided to meet the needs of their clients ● Free and confidential consultation ● They work diligently to obtain an evidentiary quality investigative product and ONQPI provides numerous security services ● Serves the Chicagoland area and surrounding municipalities as well as National and International clientele ● Have many years of former law enforcement experience in Local, County, State and Federal Government


Mon - Fri 8:30 am - 5:00 pm
Sat & Sun Closed

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2406 West Fullerton Avenue, Chicago, IL 60647

Since 1959

Theft, Business, Insurance, Fraud, Assets, Criminal and Civil Investigations, Background Checks, Computer Forensic Data Recovery, Child Custody, Cheating and Infidelity, Debugging, Lie Detection, Trademark Patent a Copyright, Process Service, Missing Persons, Surveillance, Witness Statements, No Compete Contracts, Legal & Hidden Cameras

Specializes in discreet, professional and confidential investigative services ● Free 100% Confidential Consultation ● 24 emergency service available ● Experts in fraud, theft, electronic counter espionage as well as all areas of business investigations ● Serviced thousands of satisfied attorney clients by solving cases with creative methods ● Handles many cases nationally and internationally as well

License #117-000206


Mon - Fri 9:00 am - 6:00 pm
Satuirday & Sun Closed

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7529 North Oakley Avenue, Unit 1, Chicago, IL 60645

Since 2013

Surveillance Operation, Cell Phone Forensics, Infidelity, Background, Criminal Defense, Personal Injury and Computer Investigations, Telephone and Computer Forensics, Hidden Camera Placement, Decoy Services, Bank and Brokerage Account Searches, Medical Records Sweep, Debugging, Law Enforcement & Private Sector Training

Assist you in obtaining the information you need to make those difficult decisions that come up in your professional and personal life ● Free consultation would be conducted to determine what would be the best approach in your particular situation ● Offers similar services, but their services are the best and come with a personal touch ● They have treated every customer like they were a part of their family ● 24/7 Emergency services available

License #117001699


Mon - Fri 9:00 am - 5:00 pm
Sat 9:00 am - 12:00 pm
Sun Closed

TBR® Inspection Report