Signature Investigations Group
“Totally professional with everything we needed, with a pleasant side of kindness.”
Best Private Investigators in Grand Rapids, MI
13 agencies listed · 9 in Grand Rapids · 7 open 24/7 · 10 open weekends · 10 rated 4.5+
Data verified October 18, 2026
We are still growing
There are too few quality options within 15 miles, so we have expanded area of coverage to up to 60 miles from you. This includes Grand Rapids and several other cities.
Empire Surveillance
“They were available via phone right away and were able to help me in a timely manner.”
1st Assured Investigations
“She answered all my questions and never made me feel like I was a nuisance.”
West Michigan Investigative Solutions
“Simply stated - highest level of professionalism, premier client care, timely responses, and most importantly, we greatly benefitted from Matt's decades of experience, insights and relevant guidance.”
Umbrella Security & Investigation Services
“Excellent and Professional service, does the job how the customer wants, provides Security/Investigations, for a safe and secure America.”
Shield Private Investigations
“He has high standards and an immense ability to interview people and close cases.”
The 13 agencies on this page are the private investigators listed for Grand Rapids, 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.
Area overview: Grand Rapids, MI
9 of the 13 agencies we list are based in Grand Rapids; the other 4 serve Grand Rapids from towns including East Grand Rapids (2 mi), Grandville (6 mi) and Wyoming (6 mi). 12 of the agencies on this page have a rating, from 3.0 to 5.0 across 148 reviews; 10 are rated 4.5 or higher. 7 are open around the clock; 10 are open on Saturdays and 8 on Sundays. 4 show a license on their websites and 3 have a BBB rating of A or A+. Domain records put 6 websites of the agencies on this page at ten or more years old; the oldest dates from 2004. 7 offer urgent consultations and 1 lists coupons or special offers. We have a website on file for 11 of the agencies on this page; 8 publish a contact page and 4 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.
Why are investigation agencies outside Grand Rapids shown here?
9 of the 13 agencies have an address in Grand Rapids. 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.
Grand Slam Investigations
“I highly recommend him for process service, background checks, drug testing, and private investigation.”
Investigate Michigan
Mark Matthews and Associates
“Went on to be very reassuring that he could locate info that I was seeking.”
Diversified Protection and Investigations
GPS Bait Investigations
“On short notice they were quick and professional, also very friendly and easy to work with.”
Complete Investigations
“I hired Complete Investigations for a special little investigative project and was very impressed.”
Brownstone Investigations
Why these companies made our list
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