Security and Investigation
A reference for security providers and investigation firms. Use it to understand service categories, evaluate vendors, and find licensed firms for guard services, executive protection, cybersecurity, and private investigation work.
Lists such as the Security 500 rank large enterprise security programs by scope and budget. They provide useful context for benchmarking program maturity but are not a substitute for direct vendor due diligence. Always combine industry rankings with licensing checks, references, and on-site evaluation.
Most US states license private investigators at the state level, with separate licenses for firms and individual investigators. Some states require partnership with a licensed agency before solo work is allowed. Confirm both firm and investigator licenses through the state licensing authority.
Hiring an unlicensed security firm or investigator can expose your organization to legal, evidentiary, and reputational risk. Confirm licensing, insurance, training, and references before signing any contract — and prefer firms that publish their accreditation and case-handling standards openly.
It typically lists licensed security firms, guard services, executive protection providers, cybersecurity vendors, and risk consultancies, organized by service type, location, and accreditation.
Private investigators are usually licensed at the state level. Confirm the firm's license, insurance, and any complaints through the state licensing authority before hiring.
Industry rankings group large enterprise security organizations by program scope and budget. They are useful for benchmarking, not a substitute for vendor due diligence.
Corporations, law firms, insurers, retailers, healthcare facilities, property owners, schools, event organizers, and high-net-worth individuals all engage security and investigation providers.