Global Intelligence Associates
“These people are at the top of their game.”
Best Private Investigators near Smithtown, NY
1 of these agencies is based in Smithtown; the others serve Smithtown from towns including Melville (12 mi), Huntington (9 mi) and West Babylon (13 mi).
5 open 24/7 · 9 open weekends · 13 rated 4.5+ · 8 show a license
Data verified October 21, 2026
Root Investigations
“She took what little information we were able to provide and quickly pieced together some promising leads, even going above and beyond to assess and provide insight into how to best achieve the outcomes we were hoping for.”
Long Island Timely Process Servers
“I will absolutely use him in the future & recommend him for anyone who has a snake and hides from process servers!!!”
TLO Group
“Hired TLO for a private event and could not be happier with the level of service provided.”
Venetiou & Associates
“Chris helped my wife and I track down our wedding videographer and recover footage from our wedding after not being able to get in contact with him for months.”
Dynamic Protection Group
“The people we dealt with were professional, courteous, understanding and we felt safe under their care!”
The 15 agencies on this page are the private investigators listed for Smithtown, NY. 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: Smithtown, NY
14 of the 15 agencies on this page have a rating, from 4.4 to 5.0 across 260 reviews; 1 has 50 or more reviews and 13 are rated 4.5 or higher. 5 are open around the clock and 9 are open on weekends. 8 show a license on their websites and 1 has a BBB rating of A or A+. Domain records put 8 websites of the agencies on this page at ten or more years old; the oldest dates from 2004. 5 offer urgent consultations; 1 offers remote or virtual consultations; 2 offer a free initial consultation and 1 lists coupons or special offers. We have a website on file for 14 of the agencies on this page; 12 publish a contact page and 12 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.
Do investigators listed for Smithtown discuss a case free?
2 of the 15 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.
Joseph Cornetta Investigations
“I would highly recommend his firm to anyone and everyone in need of a private investigator.”
Absolute Private Investigations
M.C. Investigators
“Michael was attentive and exceeded my expectations with top notch service, full details and constant communication.”
The County Wide Group
“Came here for an employment drug screen.”
All Private Investigations
“He is smart,responsible,reliable,savvy and very personable with clients.”
Professional Intelligence Agency
“Not only the best in the business, but the only one you will ever need.”
Advantage Investigations
KAM Investigations
New York's Finest Private Investigative Services
Why these companies made our list
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