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View RJA (UK) Ltd's top competitors like APEX SECURITY LIMITED, Aspire Security, and Better Security Guarding.

G4S
G4S is the International business of Allied Universal®, the world’s leading security and facility services provider and trusted partner to more than 400 of the Fortune 500. Allied Universal® delivers unparalleled customer relationships, innovative solutions, cutting-edge smart technologies and tailored services that enable clients to focus on their core businesses. With operations in over 100 countries and territories, Allied Universal is the third largest private employer in North America and seventh in the world. Annual revenue is approximately $23 billion. There is no greater purpose and responsibility than serving and helping to safeguard customers, communities and people. For more information, visit g4s.com.
UK
Public
$20B Revenue
http://www.g4s.com
118.4K Employees
LSE:GFS Ticker
Mitie
Founded in 1987, Mitie is the UK’s leading facilities management and professional services company. We offer a range of specialist services including Security, Engineering Services, Cleaning, Landscaping, Energy and Property Consultancy, Property Maintenance, and Custody Support Services. Mitie employs 84,000 people across the country, looking after a large, diverse, blue-chip customer base, from banks and retailers, to hospitals, schools and government offices. We take care of our customers’ people and buildings, by delivering the basics brilliantly and by deploying advanced technology. We are pioneers in the Connected Workspace, using smart analytics to provide valuable insight and deliver efficiencies to create outstanding work environments for customers.
UK
Public
$5.9B Revenue
http://www.mitie.com
19.6K Employees
MTO Ticker
Paladin Security Group Ltd
As one of Canada’s Best Managed Companies, boasting Canada’s 10 Most Admired Corporate Cultures, Paladin is Canada’s leading security company, with services and superior expertise that span all types of protection. Our outstanding people, ongoing training, state-of-the-art technology, advanced monitoring stations, and passion for customer service excellence enable us to provide the most responsive and effective security programs in the industry. About Us Paladin was established in 1976 to provide basic Security Officer services. From modest beginnings with four employees and one contract, Paladin has grown into one of the largest security companies in Canada with offices from coast to coast. Our Mission Paladin’s mission is to provide our clients with the finest security services and products available. With our extensive range of products and services, we care for our clients’ safety and security. We strive to provide the very best in quality, and therefore commit to investing heavily into the selection, training, support, supervision and personal development of our people.
Burnaby, CA
Private
https://paladinsecurity.com/
5.9K Employees
G2 Leader Summer 2026 G2 Best Est ROI Mid-Market Summer 2026 G2 Easiest Admin Mid-Market Summer 2026 G2 Most Implementable Summer 2026 G2 Best Results Mid-Market Summer 2026 G2 Lead Capture Mid-Market Summer 2026 Inc Fastest Growing Private Companies 2026 Inc Best Workplace 2026
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