Best Private Investigators in Frederick, MD

The highest-rated Private Investigator & Detective companies out of 189 vetted & reviewed in the Frederick area.

Deanovich & Associates

Deanovich & Associates

(9)
Pipeline Security, Investigations, Security Services
“Our investigative TEAM, SACS Consulting, Investigative and Security Services is located in Ohio and from time to time we need to partner and depend on other security organizations across the U.”
Emergency Services
In Business Since 2014
Accepts All Major Credit Cards
5257 Buckeystown Pike #153, Frederick, MD
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Sirius International Security and Investigations

Sirius International Security and Investigations

Investigative Services, Sirius Security Services, Tactical
“We provide a full range of physical security services to commercial and industrial customers on four continents. The SIRIUS Dignitary Security Service, LLC is an industry leader in several geographic markets and functional areas of security, and is a...”
In Business Since 2009
120 Record St, Frederick, MD
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Investigation Services of Frederick

Investigation Services of Frederick

(11)
  • Divorce
“I asked Jim to help me to serve the divorce paper to my spouse, Jim exhibited exceptional professional ethics, and beside that acted as a compassionate human being.”
In Business Since 2019
Free Initial Consultation
Serving Frederick Area
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Resolute CSI

Resolute CSI

(3)
“RESOLUTE is a "go to" agency for private investigations and personal security.”
In Business Since 2016
Emergency Services
Serving Frederick Area
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Prudential Associates

Prudential Associates

(10)
Individual Clients, Physical Security, Paralegal Services
“Jared Stern and his investigators have assisted my clients in many situations from confirming adultery, locating and retrieving a missing vehicle to finding a kidnapped child.”
Accepts All Major Credit Cards
In Business Since 1980
Licensed, BBB Rating: A+
9200 Corporate Blvd Suite 200, Rockville, MD
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Shallbe Global Security

Shallbe Global Security

(25)
Missing Person Investigations, Fugitive Recovery, Cheating Spouse & Domestic Surveillance
“After completing the HQL and Wear & Carry Permit courses, I would highly recommend that anyone looking for their certifications enroll in their courses regardless of your experience level.”
Free Initial Consultation
In Business Since 2018
Licensed
Serving Frederick Area
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K17 Security

K17 Security

(11)
Training Services, Physical Security, Consulting Services
“We are grateful for his passion to keep communities safe and appreciate not only traveling the distance to work with our schools but for the ongoing information he has sent since our training when he comes across something he thinks would be benefici...”
In Business Since 2009
9710 Traville Gateway Dr # 383, Rockville, MD
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Positive Force Personal Protection

Positive Force Personal Protection

(18)
  • Informative
  • Safety
  • Knowledge
“I highly recommend this because there is so much going on in many different places and these classes are very effective and I guarantee that you will feel not only better but much safer at all times.”
In Business Since 2021
USCCA Certified
Serving Frederick Area
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State Protection Agency

State Protection Agency

(7)
  • Security Agency
“I was impressed with this company, very professional and on point.”
In Business Since 2019
9711 Washingtonian Blvd Suite 550, Gaithersburg, MD
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Legal Eye Investigations

Legal Eye Investigations

(8)
  • Child Custody
  • Company
“Best in the buisness”
Emergency Services
In Business Since 2020
Licensed
Free Initial Consultation
Serving Frederick Area
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North Eastern Security Force

North Eastern Security Force

(11)
Wedding Security Officers, HOA Security Guard Services, Parking Lot Security Guard Services
“They were very professional over the phone, there was no hassle I just gave them the info they needed and they were there, I cannot recommend this company enough, they are now an easy first choice for me if I ever need to hire security again.”
Free Initial Consultation
Emergency Services
Transparent Fees & Pricing
11921 Freedom Dr Suite 550, Reston, VA
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Silver Star Investigations

Silver Star Investigations

(5)
Rush and Same-Day Service of Process For Urgent Matters.
“Sent a service and it was served the same day for routine cost.”
Emergency Services
20908 Pioneer Ridge Terrace, Ashburn, VA
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Global Protective Division and Investigations

Global Protective Division and Investigations

(2)
Uniformed Security Officers, Facilities Security, Loss Prevention
“Davis provided all the required equipment to safely learn how to handle a firearm, including hands-on practice with loading, unloading, and other gun mechanics prior to getting to the range.”
In Business Since 2015
Emergency Services
Serving Frederick Area
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All County Investigation

All County Investigation

(1)
“Very pleasant, very professional.”
In Business Since 1996
Licensed, BBB Rating: A+
10294 Baltimore National Pike, Ellicott City, MD
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Freestate Investigations

Freestate Investigations

(1)
“When I initially called the staff was somehow both friendly AND professional and they answered all my questions.”
In Business Since 2021
Emergency Services
515 Main St, Laurel, MD
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K & T Security Company

K & T Security Company

(14)
  • Security Companies
“In addition to the things we expect from a security company, K&T employees that we have worked with have always gone above and beyond to make sure the lobby/point of entry of our establishment remains a pleasant and presentable entry way for both vis...”
In Business Since 2015
Serving Frederick Area
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Covert Surveillance & Investigations

Covert Surveillance & Investigations

(9)
Specializing in Adultery
“Good and timely communication, professional, and competent.”
Accepts All Major Credit Cards
In Business Since 2015
Licensed
Locally Owned & Operated
Serving Frederick Area
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Global Investigative Services

Global Investigative Services

(9)
“Great customer service”
In Business Since 1999
1700 Rockville Pike #230, Rockville, MD
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High Speed Protection

High Speed Protection

(1)
“Very knowledgeable and informative!”
In Business Since 2021
Serving Frederick Area
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Columbia Process and Investigative Services

Columbia Process and Investigative Services

“Columbia Process and Investigative Services (CPI) is a premier process serving and investigative company. The company combines over 75 years of experience in law enforcement and legal services under the leadership of a former Deputy Chief of the Metr...”
In Business Since 2015
Serving Frederick Area
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DAT Global Consulting

DAT Global Consulting

(1)
“An excellent company for armed executive protection agents and camera installations.”
In Business Since 2023
Emergency Services
Serving Frederick Area
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Cold Case Recovery

Cold Case Recovery

Judgments, Garnishments
“Cold Case Recovery has experience in all parts of judgment and debt recovery including skip-tracing and locating your debtor's assets. We have no minimum balance requirements and happily work with buisnesses regardless of your size and individual peo...”
In Business Since 2006
Serving Frederick Area
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RWJ Investigations

RWJ Investigations

“RWJ Investigations is a full service private investigation firm, and is ready to serve you in any investigation you need help with. Over the years, I've built up a solid reputation based on integrity, quality, and experience. My mission is to get you...”
Free Initial Consultation
In Business Since 2021
Licensed
Serving Frederick Area
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National Consulting & Investigative Services

National Consulting & Investigative Services

“National Consulting & Investigative Services LLC, dba NATCON, is a licensed security consulting and investigative firm with offices in the Tidewater region of Virginia covering Williamsburg, Richmond, and the surrounding areas. Previously based in no...”
In Business Since 2011
Accepts All Major Credit Cards
Serving Frederick Area
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Private Detective Services in Frederick, MD Cost Estimates

Minimum cost
$333
Maximum cost
$10544
National Average
$1332
Avg Per Hour Rates
$139
$777
$2220
Typical price range is based on 256 cost profiles
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Average Cost $1332
Minimum cost $333
Maximum cost $10544
Avg Per Hour Rates $139

Typical range $777 to $2220 is based on 256 cost profiles.

Why these companies made our list

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