Youlen Detective Agency
“This agency was quick, responsive, highly informative, and we can sleep much better after retaing services.”
Best Private Investigators near Manassas, VA
2 of these agencies are based in Manassas; the others serve Manassas from Fairfax (12 mi), Woodbridge (15 mi) and Sterling (18 mi).
5 open 24/7 · 8 open weekends · 12 rated 4.5+ · 5 show a license
Data verified October 29, 2026
Virginia Surveillance Force
“I have noticed one consistent thing about VSF , inc Security Guard Service is that every Guard I have ran across throughout the city is that they conducted themselves with professionalism and Command Presence.”
Stealth Investigative Agency
“I had some follow up questions and she was readily available to clarify.”
Aliass
“Cierra Harris and Hannah Creekmore have always been so prompt with their updates and returning the completed affidavits to me.”
Maverick Process Service & Investigations
“Super friendly, and communicative every step of the way and served my paperwork in a timely manner.”
Samaritan Protective Services
“Just leaving everything into their hands made us all feel so secure and not having to worry about anything.”
The 13 agencies on this page are the private investigators listed for Manassas, VA. 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: Manassas, VA
The 13 agencies on this page are rated from 4.1 to 5.0 across 287 reviews; 1 has 50 or more reviews and 12 are rated 4.5 or higher. When clients rate these agencies on specific qualities, they most often praise professionalism (95%), responsiveness (76%) and value (71%). 5 are open around the clock; 8 are open on Saturdays and 7 on Sundays. 5 show a license on their websites and 2 have a BBB rating of A or A+. 7 have ten or more years of experience, the longest 24 years. 5 offer urgent consultations and 5 offer a free initial consultation. We have a website on file for all 13 of the agencies on this page; 12 publish a contact page and 9 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 Manassas shown here?
2 of the 13 agencies have an address in Manassas. 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.
Interprobe
“This was my first time using a private investigator and I was absolutely blown away by Kevin, specifically his level of professionalism and urgency regarding my matter.”
Maryland Private Investigations
“This company is the bomb and a good way, nope in an excellent way”
Sentry Force Security
“The staff is very knowledgeable and friendly, they also have great sites for both Armed and Unarmed Security Officers.”
Double G Protection & Investigation Firm
“The information they located was exactly what I needed for my case and I was very pleased with the whole experience.”
Keypoint Government Solutions
Global Defense Investigation
“Mr Boatwright was extremely knowledgeable about working my custody case and navigated me throughout the whole process.”
Blue Iris Private Investigation Service
“You saved us a bunch of hassle and probably a couple thousands of dollars on a fraudulent case.”
Why these companies made our list
Is this page useful? Yes
No
Is there anything wrong with this page?
