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View Salisbury's top competitors like FOCUS INVESTIGATION SERVICES LIMITED, G4S, and Global Investigations.

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
Global Investigations
Professional investigations agency offering private detectives and investigators providing tracing services for domestic and corporate clients. The company boasts an impressive background of over 15 years experience. This is backed by an enviable reputation for providing a professional yet descreat operation. There skills are offered through an dynamic team of office and field agents.
UK
Private
$5.8M Revenue
http://www.globalinvestigations.co.uk/
26 Employees
VANGUARD SECURITY LIMITED
UK
Private
http://vanguardsecurity.co.uk
18 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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