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View Red24 plc's top competitors like AEGIS SECURITY, INC., Allied Universal, and ArmorGroup International plc.

Allied Universal
Allied Universal®, a leading security and facility services company, provides proactive security services and cutting-edge smart technology to deliver evolving, tailored solutions that allow clients to focus on their core business. Our excellence starts with our local leadership and local presence. In fact, in North America alone, we have an extensive network of offices to support our local communities and customers. We take pride in our extensive knowledge in a range of specialty sectors such as education, healthcare, retail, commercial real estate, government and corporate campuses, etc. We believe there is no greater purpose than serving and safeguarding customers, communities and people in today’s world. Allied Universal is There for you®.
Irvine, California, US
Private
$20B Revenue
https://www.aus.com/
108K Employees
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
118.5K Employees
LSE:GFS Ticker
International SOS
The International SOS Group of Companies has been in the business of saving lives for over 40 years. Protecting global workforces from health and security threats, we deliver customised health, security risk management and wellbeing solutions to fuel our clients’ growth and productivity. In the event of extreme weather, an epidemic or a security incident, we provide an immediate response providing peace of mind. Our innovative technology and medical expertise with a focus on prevention, offers real-time, actionable insights and unparalleled on-the-ground delivery. We help clients meet compliance reporting needs for good governance. By partnering with us organisations can fulfil their Duty of Care responsibilities, while empowering business resilience, continuity and sustainability. Founded in 1985, the International SOS Group, headquartered in London & Singapore, is trusted by 9,000 organisations, including the majority of the Fortune Global 500 as well as mid-size enterprises, governments, educational institutions, and NGOs. 12,000 multi-cultural medical, security and logistics experts stand with you to provide support & assistance from over 1,200 locations in 90 countries, 24/7, 365 days. To protect your workforce, we are at your fingertips: www.internationalsos.com For news and events updates follow us on Twitter - https://twitter.com/IntlSOS
Singapore, SG
Private
$2.5B Revenue
http://www.internationalsos.com
12.9K 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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