Chicago's Premier Private Investigators

  • Commitment

  • Professionalism

  • Proven Results

Our Services

Wide Range of Services

Our licensed professional investigators are men and women who are dedicated to finding the information you seek — whether it’s in your neighborhood, across the country or around the world.

... And More


  • Personal Service

    You always have an actual person to whom you can speak.
  • Experienced Investigators

    We hire the best-qualified staff, and invest in their training and development.
  • State-of-the-Art Systems and Equipment

    We use advanced technology and techniques to ensure quality, court-admissible results.

Ready to Get Started?

Our Professional Memberships

Trusted by Clients for Four Decades

Our private investigation company has been proudly serving Chicagoland since 1975. Today, we are known as the private investigator Chicago businesses and individuals turn to when they need answers. Arkus, Inc. has performed expert, discreet investigations for Fortune 500 companies, small businesses, insurance companies, law firms and private citizens – with quality, integrity and the highest level of customer service. We bring our decades of experience, dedication to doing the job right, and personal attention to each case. We are proud to be considered among the top private investigation firms.

Proven Results

Are you facing a serious situation? Arkus is serious about results. We hire only local private investigators with a minimum of five years of experience in the field, guaranteeing that every client reaps the benefits of working with a seasoned professional. We take a common sense approach to each case to ensure a successful outcome and grant you the peace of mind you deserve. Count on Arkus to help you resolve your crisis in a private, professional and effective manner – 24 hours a day, seven days a week.

Dedicated Private Eyes

More than half of our business comes from repeat clients. Why do they keep coming back? Because they’ve experienced our dedication and quality results firsthand, and they know that we stand apart from other private investigation firms. Our clients know that when you choose Arkus, you have more than one personal investigator working for you; you get a team of highly qualified private investigators on your side. Many of our new clients are astounded by the lengths we go to in order to ensure that the job is done right. When you face a serious situation, you need a private detective agency and team that’s serious about results – you need Arkus.

Whether Arkus, Inc. is assisting businesses with their investigation needs, working with attorneys to support their clients’ cases, or helping individuals get the answers they need about a personal matter, we take the same dedicated approach. To learn more about why we are the private investigator Chicago businesses, attorneys and individuals trust, and to hire a private detective, contact Arkus, Inc. today.