Popular Cities
2 of these agencies are based in Ann Arbor; the others serve Ann Arbor from towns including Livonia (20 mi), Howell (25 mi) and Bloomfield Hills (30 mi).
10 open 24/7 · 13 open weekends · 15 rated 4.5+ · 6 show a license
Data verified October 18, 2026
The 24 agencies on this page are the private investigators listed for Ann Arbor, MI. 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.
22 of the 24 agencies on this page have a rating, from 3.9 to 5.0 across 339 reviews; 3 have 50 or more reviews and 15 are rated 4.5 or higher. When clients rate these agencies on specific qualities, they most often praise professionalism (96%), responsiveness (83%) and value (78%). 10 are open around the clock and 13 are open on weekends. The services the agencies on this page list most often on their websites are surveillance (3), background checks (2), event security (2), private investigation (2) and process service (2). 6 show a license on their websites and 1 has a BBB rating of A or A+. Domain records put 18 websites of the agencies on this page at ten or more years old; the oldest dates from 1998. 10 offer urgent consultations and 3 offer a free initial consultation. We have a website on file for 23 of the agencies on this page; 21 publish a contact page and 21 list a public email. 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.
2 of the 24 agencies have an address in Ann Arbor. 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.
