Private Security Companies in the United States

	Founded	Type	Employees	Revenue	Funding
Allied Universal	2016	Privately Held	10000+	-	$
Defense Counterintelligence and Security Agency (DCSA)	1972	Government Agency	10000+	-	$
Triple Canopy (A Constellis Company)	2003	Privately Held	10000+	-	$
The GEO Group, Inc.	1984	-	10000+	-	$
AlliedBarton Security Services	1957	Privately Held	10000+	-	$
Constellis	-	-	10000+	-	$
Convergint	2001	Privately Held	1.0K - 5.0K	990.6M	$47M
Akal Security	1980	Privately Held	100 - 250	33.9M	$0
Andrews International	1988	-	10000+	-	$
ACADEMI (A Constellis Company)	2010	Privately Held	10000+	-	$
Command Security Corporation	1980	Public Company	1.0K - 5.0K	170.4M	$450K
ADT Authorized Dealer Program	1874	Public Company	10000+	-	$
BGS Security Division	1993	-	10000+	-	$
Brosnan Risk Consultants	1996	Privately Held	5000-10000	< 1M	$0
Admiral Security Services	1976	-	5000-10000	-	$
Rapiscan	1958	Public Company	5000-10000	< 1M	$0
Arrow Security	1985	-	5000-10000	-	$
Tarian	2022	-	5000-10000	-	$
Tyco Integrated Security	1874	Public Company	100 - 250	35M	$0
Elite Security & Staffing	1995	Privately Held	5000-10000	-	$
Centerra Group	1960	-	5000-10000	-	$
ADI Global Distribution	-	-	1000-5000	-	$
Titan Security Group	1994	Privately Held	1.0K - 5.0K	55.4M	$0
Andy Frain Services	1924	Privately Held	1.0K - 5.0K	120M	$0
Elite Investigations	1980	Privately Held	1.0K - 5.0K	44.3M	$5M
Chenega Security SBU	2012	Privately Held	1000-5000	-	$
Blackwater USA	-	Privately Held	1000-5000	-	$
Ascent Media	-	Public Company	1000-5000	-	$
Cypress Private Security	1996	Privately Held	1.0K - 5.0K	40M	$0
American Security	1975	Privately Held	1000-5000	-	$
CPS Security	1989	Privately Held	1.0K - 5.0K	53.8M	$0
DK Security	1995	Privately Held	25 - 100	4.5M	$0
Cambridge Security Services Corp	1984	Privately Held	500 - 1.0K	36M	$2M
Bowles Corporate Services, Inc.	1992	Privately Held	1000-5000	-	$
DECO	1986	Privately Held	100 - 250	25.8M	$0
Pavion	1969	Privately Held	250 - 500	73.5M	$0
Apollo International an Allied Universal Company	1990	-	1000-5000	-	$
Doyle Security Services, Inc. (DSS)	2005	Privately Held	1000-5000	-	$
Custom Risk Solutions -Division of SOS Security LLC	1969	Privately Held	1000-5000	< 1M	$0
DSI Security Services	1969	Privately Held	1.0K - 5.0K	57.5M	$0
Cam Connections, a division of Protection 1/ADT	1998	Privately Held	25 - 100	16.6M	$0
Nation Security	2000	-	1000-5000	-	$
American Security Associates, Inc.	1999	Privately Held	1000-5000	-	$
Chesley Brown International	1990	-	1000-5000	-	$
Blue Star Security	2009	Partnership	1000-5000	< 1M	$0
American Services, Inc.	1975	Privately Held	25 - 100	18.9M	$0
Acadian Total Security	1999	Public Company	1000-5000	< 1M	$0
Cascadia Global Security / Cascadia Off-Duty	2018	Privately Held	1000-5000	-	$
BCI Security Services	1991	-	1000-5000	-	$
AMK9 - American K-9 Detection Services LLC	2003	Privately Held	250 - 500	15M	$0
Bay Alarm Company	1946	Privately Held	25 - 100	47.5M	$0
CoventBridge Group	-	-	500-1000	-	$
ADT Security Services	1874	-	10K - 50K	5.2B	$450M
DTiQ	1998	Privately Held	250 - 500	65M	$207M
American Guard Services, Inc.	1997	Privately Held	500-1000	-	$
Citiguard	1998	Public Company	500-1000	-	$
Affiliated Monitoring	1977	Privately Held	25 - 100	23.3M	$0
Analogic	1967	Privately Held	1.0K - 5.0K	467.6M	$0
ASG Security	2002	Privately Held	25 - 100	69.9M	$0
Devcon Security	2004	Privately Held	25 - 100	10.3M	$215M
BTI Security	2000	Privately Held	500-1000	-	$
Torres AES	2003	Privately Held	500-1000	-	$
Bower	-	Privately Held	500-1000	-	$
Akima Global Services, LLC	-	Privately Held	500-1000	-	$
Trident Security Services, Inc.	2001	Privately Held	25 - 100	7M	$0
Diversified Protection Corporation	1999	Sole Proprietorship	500-1000	-	$
Blackstone Security Services, Inc.	1993	Privately Held	500 - 1.0K	10M	$1M
ADC LTD NM	1985	Privately Held	500 - 1.0K	56.5M	$0
AmeriGuard Security Services, Inc.	2000	Privately Held	1 - 25	10M	$0
ACTS-Aviation Security	2001	Privately Held	500-1000	< 1M	$0
Clarion Security	2010	Privately Held	250 - 500	11.4M	$1M
TriCorps	2000	Privately Held	500-1000	< 1M	$0
Elite Guard Security Services	1983	Privately Held	25 - 100	6.2M	$0
Tricon Security Group LLC	2004	Public Company	100 - 250	5.6M	$0
AllNOneSecurity	2001	Public Company	100 - 250	34.5M	$2M
Twin City Security, Inc.	1972	-	500-1000	-	$
Top Guard Security	1996	Privately Held	25 - 100	15.7M	$0
American Security Services, LLC	1986	Sole Proprietorship	25 - 100	7.7M	$0
Arms Security Corporation	2010	-	500-1000	-	$
BCM Security Services	-	-	500-1000	-	$
Associated Protective Service, Inc. (APS)	2008	-	500-1000	-	$
The Robison Group	1998	Sole Proprietorship	100 - 250	24.7M	$0
Advantage Investigations	1998	-	200-500	-	$
Guardian Access Solutions	1987	Privately Held	100 - 250	21.2M	$0
Triumph Protection Group	2013	Public Company	25 - 100	1.3M	$0
Trident Security Solutions	2017	-	200-500	-	$
Blue Knight Security & Patrol	2020	-	200-500	-	$
Alante Security Group Inc.	-	-	25 - 100	8.3M	$2M
Edifice Protection Group	-	Partnership	200-500	-	$
T&M USA, LLC	1981	Privately Held	200-500	-	$
Tech Systems Inc. (TSi)	1987	-	200-500	-	$
Sign In Compliance (formerly ThreatSwitch)	2017	Privately Held	200-500	10M	$3.3M
Allied Barton Securtiy	-	-	200-500	-	$
Alliance Security	2003	Privately Held	250 - 500	30.3M	$0
Datawatch Systems	1981	Privately Held	100 - 250	36.9M	$0
Concentric	2005	-	200-500	-	$
AMAG Technology	1971	Privately Held	100 - 250	11.5M	$0
Titan Global, LLC	-	Privately Held	100 - 250	43.1M	$0
DGA Security	1969	Privately Held	25 - 100	31.1M	$0