Acorn Technologies, Inc., offers security solutions to home and business owners in Billings and the surrounding communities. Its team knows how to install video surveillance and access control systems. It also works with businesses in setting up kiosks and displays, ATMs, networks and routers, and cables. The company has been providing its services since the 1980s. Its technicians carry numerous certifications and credentials from various institutions and manufacturers. Former clients include Wells Fargo, Walgreens, and Hub Insurance.

Advanced Protection Systems offers security solutions to clients in Billings. Its technicians install CCTV cameras for site surveillance, digital video recording, and POS integration. They also set up intrusion detection products from Honeywell such as panic buttons, water sensors, smoke detectors, carbon monoxide detectors, and thermostat controllers. In addition, they provide access control systems from S2 Security. Advanced Protection Systems, a member of the National Fire Protection Association, also provides fire alarms, intercoms, and central station monitoring.

CK Tech + Security serves residential and small commercial clients in Billings and nearby areas. It offers alarm monitoring and security systems for intrusion, fire, flood, and temperature with high-definition IP camera systems with human and vehicle notifications and live video verification. The company also installs smart-home automation systems, home theaters, automated lighting, audio systems, and central vacuum systems. It utilizes Control4 smart home technology. CK Tech + Security was first established in 2008 as CK Communications.

Based in Billings since 2002, Comtech Audio Theater Security is a state-licensed and NICET-certified specialist in security and monitoring systems for homes and businesses. The company can provide and install a range of landline, cellular, and interactive systems that provide security 24/7. These systems can include carefully positioned video cameras that produce high-quality images, even in low light, and access control devices that can be managed remotely. Comtech Audio Theater Security also installs fire alarms and digital signage.

Since its founding in 1964, DIS Technologies has been providing solutions to the IT, security, and other technological needs of clients in Billings and its surrounding areas. All certified for the Department of Justice’s Criminal Justice Information Systems, its technicians install business and home security systems like security cameras, access control systems, and panic buttons. DIS Technologies serves clients from a diverse range of industries, including local government, corporate, hospitality and entertainment, construction, and law enforcement.

Hastings Smart Technologies delivers a wide range of security solutions to homeowners and small business owners in Billings and the surrounding areas. Its services include the installation of smart home technologies, home and business networking, business security cameras, and wireless home security systems. These security systems can be monitored by the clients or self-monitored anywhere using phones, laptops, or tablets. Hastings Smart Technologies works with several brands, such as Nest, Schlage, Redlink, and Hue Philips.

Security Management Systems is a Billings-based company that serves commercial and residential clients within the metro. Its specialists assist clients in developing a security plan that includes residential video surveillance, alarm monitoring, and asset tracking. It also provides installation and maintenance services for its various security products to ensure that clients' appliances are working smoothly. Security Management Systems is a locally owned and locally operated firm that provides customized options when clients want to switch to a new security system.