Kastle, your Premier Managed Security Provider in
San Francisco, CA.

415.962.1300

​​​Kastle is a premier managed security service company in San Francisco, CA. Leading the security industry since 1972, we provide state-of-the-art security solutions for clients across San Francisco, the nation, and the world protecting more than 2 million people across 10,000+ locations globally.

Our San Francisco security experts offer a suite of integrated solutions including access control, video surveillance, visitor management and identity management, as well as mobile security applications – all integrated on an open, standards-based platform and supported by a team of experts 24x7x365.

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Address
425 California St.
Suite 810
San Francisco, CA 94104

Business Hours
Monday-Friday: 8am-6pm
Saturday-Sunday: Closed

Monitoring Center
Monday-Sunday 24/7

Kastle’s San Francisco office is located in the heart of the Financial District with convenient access to major transportation routes including US-101, Interstate 80, and the Embarcadero. This central location provides efficient connectivity to downtown San Francisco, the Bay Bridge corridor, and surrounding communities throughout the greater Bay Area.

Directions from
Oakland, CA

 

  • Take I-80 West toward San Francisco via the Bay Bridge.
  • Continue into downtown San Francisco.
  • Exit toward Fremont Street.
  • Continue toward California Street and head west. Kastle’s office will be on the right.

Directions from
San Francisco International Airport (SFO):

  • Take US-101 North toward Downtown San Francisco.
  • Continue toward I-80 East / Bay Bridge.
  • Exit toward Fremont Street.
  • Continue toward California Street. Kastle’s office will be on the right.

Directions from
San Mateo, CA:

 

    • Take US-101 North toward San Francisco.
    • Continue toward I-80 East / Bay Bridge.
    • Exit toward Fremont Street.
    • Continue toward California Street and head west. Kastle’s office will be on the right.

 

Cities and communities served: San Francisco, Oakland, Berkeley, Daly City, San Mateo, Redwood City, Palo Alto, San Bruno, South San Francisco, and surrounding communities across the San Francisco Bay Area.

Kastle supports a broad range of properties across San Francisco, including Class A office buildings, multi-tenant campuses, mixed-use developments, residential high-rises, and government or civic facilities. Our solutions are designed for both new construction and existing buildings looking to modernize their security.
In San Francisco, Kastle provides enterprise-grade access control solutions that include cloud-based access management, mobile credentials for smartphones and wearables, key fob systems, and tailored visitor management. Kastle’s access control solutions are scalable, supporting everything from single buildings to large multi-site portfolios while maintaining high levels of security and operational efficiency.
Access control ensures only authorized individuals can enter specific areas while providing real-time activity tracking for better visibility and investigations. It reduces risks like unauthorized entry and supports emergency response measures such as lockdowns and controlled access during incidents.
Kastle provides AI-enabled video surveillance systems with IP cameras, cloud and edge recording, and centralized video management. These systems integrate with access control and analytics to give property teams clearer visibility and faster response to events.
Yes, Kastle offers professional monitoring services in San Francisco supported by trained security operations teams. Monitoring options include 24/7 alert monitoring and escalation, real-time incident notifications, and AI-driven event filtering to reduce false alarms.
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How can I get started with Kastle in San Francisco?

Getting started is simple:

  1. Contact our security specialists by calling 415.962.1300 or filling out this form.
  2. We’ll schedule a site consultation and security assessment.
  3. You’ll receive a custom proposal aligned to your goals, budget, and timeline.
  4. Deployment and onboarding are coordinated to minimize disruption.
  5. Ongoing support and performance reviews help you optimize your security program.