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Global Intelligence Associates
“These people are at the top of their game.”
Best Private Investigators near Smithtown, NY
2 of these agencies are based in Smithtown; the others serve Smithtown from towns including Melville (12 mi), Huntington (9 mi) and West Babylon (13 mi).
9 open 24/7 · 13 open weekends · 21 rated 4.5+ · 11 show a license
Data verified October 21, 2026
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True People Check
“I couldn't find these accounts, which turned out to be very helpful.”
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Root Investigations
- Hope
- Knew
- Individuals
“She's extremely professional and responsive, but more than that she's just a really kind and sincere person that actually cares about her clients and their issues.”
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Dynamic Protection Group
- Part Time
- Management
- Officers
“Always helpful and courteous, I have to say I have never been more happier with any job in my experience, this is the most convenient job and a blessing, it's helps me in many ways.”
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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.”
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TLO Group
- Company
- Security
- Legal
“I recently had use to contact the TLO group for a personal legal matter.”
The 24 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
22 of the 24 agencies on this page have a rating, from 4.3 to 5.0 across 221 reviews; 1 has 50 or more reviews and 21 are rated 4.5 or higher. When clients rate these agencies on specific qualities, they most often praise professionalism (97%), quality (81%) and responsiveness (81%). 9 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 background checks (2), private investigations (2) and surveillance (2). 11 show a license on their websites and 1 has a BBB rating of A or A+. Domain records put 14 websites of the agencies on this page at ten or more years old; the oldest dates from 1999. 9 offer urgent consultations; 1 offers remote or virtual consultations; 3 offer a free initial consultation and 2 list coupons or special offers. We have a website on file for 23 of the agencies on this page; 19 publish a contact page and 19 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 Smithtown shown here?
2 of the 24 agencies have an address in Smithtown. 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.
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Long Island Timely Process Servers
- Phone
- Traffic
- The Future
“Just to be a little brief I was in the situation where the other party was refusing with all their efforts to be served in a situation where they kidnapped the children.”
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M.C. Investigators
- Communication
- Court
- Results
“Hired MC Investigators to find some family members we had lost contact with and they were able to produce real results quickly and were extremely professional.”
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All Private Investigations
- Company
“From the beginning of my request to the end, I was informed of every detail of how my situation would be handled with courtesy as well as concise information.”
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Long Island Private Investigator
“Thanks Long Island PI.”
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Joseph Cornetta Investigations
- Skilled
- Compassionate
- Team
“I used joe for a criminal defense not only is he a real pro but has a feel for you as a person so now i am happy to call him my friend and would recommend his service to all”
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Viceroy Investigations & Consulting
“I highly recommend them to anyone looking for excellent service!”
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Absolute Private Investigations
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George Scheld Investigations
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Hold That Scene- Investigations and Security
- Company
“Excellent work protecting village hall.”
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Paul J Larkin Associates
“5 stars all thexway”
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Vanson Investigations
“I c u 2”
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The County Wide Group
“Quick service and nice people!”
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Sutton Associates
- Questions
- System
- Team
“Going up against all odds and a very difficult client mr Murphy used his highly trained people as well as the firms many resources to establish a well planned and cleverly crafted memorandum in support of political corruption.”
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New York's Finest Private Investigative Services
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Professional Intelligence Agency
“Not only the best in the business, but the only one you will ever need.”
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KAM Investigations
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Arx Group
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Advantage Investigations
Private Detective Services in Smithtown, NY Cost Estimates
Minimum cost
$355
Maximum cost
$11231
National Average
$1419
Avg Per Hour Rates
$148
$828
$2365
Typical price range is based on 402 cost profiles
Why these companies made our list
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