This is a list of notable private security companies.

Africa

Nigeria

• Halogen Group Nigeria

South Africa

• Bidvest Protea Coin

Oceania

Australia

• Paladin Group (private military contractor)
• Wilson Security

Asia

India

• IViz Security
• Security & Intelligence Services Pvt Ltd
• Reliance Global Corporate Security

Israel

• Mikud

Japan

• Secom

Europe

Denmark

• ISS A/S

Ireland

• Integrated Risk Management Services

Spain

• Prosegur

Sweden

• Securitas AB

Switzerland

• ImmuniWeb
• Securitas AG

United Kingdom

• Aegis Defense Services
• Control Risks
• Corps of Commissionaires
• G4S
• International Intelligence Limited
• Intelligent (UK Holdings) Limited
• Mitie
• Rubicon International Services

Americas

Canada

• GardaWorld
• Canadian Corps of Commissionaires

United States

• ADT Security Services
• Allied Universal
• G4S Secure Solutions
• Inter-Con Security
• Monitronics
• Paragon Systems
• Pinkerton
• Vivint
• Blackwater
• American International Security Corp