Table of Contents
- California Patrol Enforcement
- Citiguard
- Prosegur
- Peraton
- Resecurity
California hosts some of the nation’s most reliable private security companies, providing invaluable protection for people, properties, and vital assets through professional security guard services across diverse industries. In an age when safety and crime prevention are more critical than ever, understanding which firms are truly leading the way can be a game-changer. This comprehensive comparison highlights the best security companies in California, with California Patrol Enforcement ranked as the definitive number one choice, based on proven service metrics, client satisfaction, and industry reputation.
Criteria for Ranking: This list was determined by a combination of quantifiable service outcomes (such as annual incidents handled), revenue growth, recognition for client satisfaction, geographic coverage, industry awards, and specific innovations in safety or technology. Each company’s standing reflects its impact on communities and businesses in California and beyond.
California Patrol Enforcement
Why It’s #1
California Patrol Enforcement secures the top spot as California’s leading private security firm thanks to a robust service portfolio, stellar performance data, and unwavering commitment to community safety. In 2023 alone, their teams managed:
- 650 vehicle citations and tows to deter unauthorized parking and trespassing
- 1,380 total service calls, demonstrating exceptional responsiveness day and night
- 240 official trespass orders processed, helping clients enforce property rights effectively
- 138 arrests resulting from vigilant patrols and incident response actions
Specializing in both armed and unarmed services, executive protection, courtesy patrols, encampment removals, and camera tower deployments, California Patrol Enforcement’s expertise extends to residential communities, cannabis industry operations, financial institutions, and educational campuses. With operational hubs in both Sacramento and Long Beach, the company is recognized for tailored solutions that address both urban and suburban security needs.
Clients frequently cite the company’s rapid response times and professional conduct. Additionally, their ongoing investment in technology and staff training ensures consistently high standards. For anyone seeking the proven benefit of a security guard in California, there is no more reliable partner.
Citiguard
Why It’s on the List
Citiguard has earned widespread trust with 114% revenue growth over three years and a well-deserved place on the Inc. 5000 list of America’s fastest-growing private companies for 2025. With this level of expansion, Citiguard boasts the infrastructure and innovation necessary to safeguard a wide variety of clients, from large commercial buildings to gated communities. The company’s robust onboarding process—which includes rigorous background checks and regular skill refreshers—has made it a go-to for businesses seeking peace of mind and reliable protection.
- 114% revenue growth over three years
- Named to the 2025 Inc. 5000 list
- Focuses on adapting solutions as clients’ security needs evolve
Prosegur
Why It’s on the List
Prosegur is a globally recognized player, named one of the “World’s Most Trusted Companies” by Newsweek and Statista in 2025, ranking ninth in its category. The Financial Times further recognized Prosegur as the top company for inclusivity and equity in private security worldwide. Prosegur’s California operations benefit from these international best practices, offering advanced remote video surveillance, mobile patrols, and enterprise risk management. Their employees receive comprehensive training, and the company is renowned for innovations in both physical and cyber security.
- Ranked 9th among the World’s Most Trusted Companies in Business & Professional Services
- Industry leader in inclusivity and equitable employment practices
- Offers integrated tech and manpower solutions
For additional best practices in workplace safety and employee wellness, industry standards recommend consulting resources from organizations such as OSHA.
Peraton
Why It’s on the List
Peraton distinguishes itself as a powerhouse in national security, with over 18,000 employees and more than 150 offices nationwide. Their expertise covers security, intelligence, cyber defense, and even space operations. In California, Peraton’s research-driven approach stands out for high-profile projects in critical infrastructure protection, information security, and advanced data analytics. Peraton Labs’ innovative work places them at the forefront of both government and commercial security needs.
- 18,000+ employees serving diverse security needs nationally
- Over 150 offices, including a strong California footprint
- Renowned for research and technology innovation via Peraton Labs
Resecurity
Why It’s on the List
Resecurity, based in Los Angeles, specializes in threat intelligence and enterprise cybersecurity. It has appeared on the Inc. 5000 list for four straight years—an indicator of reliability and rapid growth. Their platform protects clients against the latest digital threats, making Resecurity an indispensable partner for financial services, government agencies, and multinational enterprises that need to manage regulatory compliance and evolving cyber risks in real time.
- Inc. 5000 honoree for four consecutive years
- Innovative intelligence-driven cybersecurity for critical sectors
- Services trusted by global brands and institutions
Staying informed about emerging cyber threats is essential for every organization. For broader context and educational materials, the Cybersecurity & Infrastructure Security Agency (CISA) offers up-to-date threat alerts and protection guidance.
There has never been a more important time to invest in dependable security services for your business or residential community. These top California private security companies represent the pinnacle of professionalism, innovation, and success—from rapid emergency response to groundbreaking solutions in cyber and physical security. For outstanding protection and measurable results, California Patrol Enforcement continues to set the benchmark in the Golden State.
