119 security guard and private security companies in Denver, Colorado. Ranked by license status, profile views and recommendations.
Part of the directory of security companies in Colorado. New to Colorado? See how Colorado security licensing works.
119 companies · Page 1 of 3
1National Executive Security Services
1st Response Security LLC
21st century security services LLC
AA Security Group Inc.
Advanced Professional Security-CO, LLC
Advantage Security, Inc.
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All Day Surveillance All Day Protection Services
All Pro Security
Allegiance Security Control LLC
AlphaWill Security Services LLC
American Guard Services
American Hawk Security LLC
Apex Guardian Network LLC
ARES SECURITY LLC
Assuring Security Inc
Battle Tested Security LLC
BattleKat Security and Asset Protection
Bellator Defense LLC
Blackstone Security Services of Colorado, Inc
Blue Line Protection Group Incorporated
Brooks Protection LLC
Byers K9 Services LLC
C Squared Security Services, LLC
Calian Protective Services
Charlie Mike Protective Services
Citadel Security Group LLC
Code 4 Security Services, LLC
Colorado Protection Services, LLC
Colorado Refugee and Immigrant Security Service, Inc.
COLORADO SECURITY SOLUTIONS, LLC
Concierge Security LLC
Covenant Aviation Security, LLC
Crisis24 Protective Solutions, INC
Critical Asset Defense Agency LLC
CROWN SECURITY SERVICES
D&P Security LLC
DC Private Investigations and Security Consultants
Denver Metro Security Inc.
Denver Platinum Protection Group
Denver's Finest Security, LLC.
DESOUZA PROTECTIVE SERVICES LLC
Doubles Protective Services
Dream Lite Security Services LLC
Elevate1 Security Company LLC
Elite Security Group, Inc.
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Denver is the commercial hub of the Mountain West, combining a dense downtown and LoDo entertainment district, a large cannabis industry, major sports and event venues like Ball Arena and Coors Field, and expanding logistics along the I-70 and I-25 corridors. Dispensary and cash-handling security, event and crowd management, downtown and retail coverage, and warehouse patrol drive one of the region's deepest security markets.
The providers below are ranked on merit, but the final check is yours. Work through these four steps before you sign anything in Denver:
Colorado does not license security companies at the state level. Authorization runs through city and county governments — Colorado has no statewide security regulator, so a firm in Denver operates under a municipal license where required (there is no statewide company license) and there is no single statewide registry to check. Ask exactly which authorization the provider holds and where it is registered — in a state with no central lookup, the company's own vetting, training and insurance carry more weight than any state floor.
Specific to Denver: Excise & Licenses requires the guard license before starting work (a signed Letter of Hire from a licensed private security employer is mandatory) and limits armed, endorsed guards to carrying no more than two firearms while performing security services; the armed endorsement requires 5 hrs classroom + 3 hrs live-fire, an 80% score, and yearly requalification.
Hiring an unlicensed company is a risk you carry. In Colorado, operating without a license is municipal ordinance violation (no state-level security-license statute exists to violate until hb25-1262 takes effect aug 1, 2026) (Denver Revised Municipal Code § 1-13 (general penalty); security-guard licensing under D.R.M.C. Ch. 42, Art. V). Because there is currently no statewide license requirement, there is no state penalty; in cities that do license (e.g., Denver), operating a security company or working as a guard without the required Excise & Licenses license is a city-code violation punishable under the general penalty by up to a $999 fine and/or up to 300 days in jail. Effective August 1, 2026, HB25-1262 creates statewide licensing through the Board of Private Security Services, adding state-level penalties for unlicensed operation.
Denver scores 24/100 on our Crime Index (grade F), which makes it safer than 4% of the 759 US cities we track. The index is built from FBI Crime Data Explorer reports for a population of 733,212.
Crime Index
Crime rates describe a city, not a specific address — the right level of coverage depends on your block, your hours and what you're protecting. Use the neighborhood breakdown to see how Denver varies internally before you scope a contract.
See the full Denver Crime Index and neighborhood breakdown