Top Illinois Security Companies (135)

Atlassian creates teamwork solutions for high-performing teams. Our portfolio of collaboration and work management software products includes Jira, Confluence, Trello, Loom and Rovo. More than 300,000 businesses worldwide rely on Atlassian’s technology, including 80 percent of Fortune 500 companies. Our solutions support various business teams and they help organizations plan, track, and deliver their biggest ideas together.

LogicGate® is the leading AI GRC platform for the Enterprise, helping governance, risk, and compliance teams limit surprises, strengthen resilience, augment program performance, and confidently quantify impact and business value. Built to provide a centralized view of risk and compliance, with AI intelligence woven into the platform's core, LogicGate delivers real-time insights and actionable data to help drive current business...

Cloudflare, Inc. (NYSE: NET) is the leading connectivity cloud company on a mission to help build a better Internet. It empowers organizations to make their employees, applications and networks faster and more secure everywhere, while reducing complexity and cost. Cloudflare’s connectivity cloud delivers the most full-featured, unified platform of cloud-native products and developer tools, so any organization can gain the...

NowSecure’s mission is to save the world from unsafe mobile apps. Founded in 2009, we are exclusively a mobile first, mobile only app security testing automation company that maintains deep roots within the security community, sponsoring open-source tools like Frida, Radare and r2frida.

Atronic Alarms is a family-owned and operated electronics integrator specializing in custom security, life safety, and automation systems for residential and commercial customers, serving the Midwest since 1982.

Coalfire is the cybersecurity advisor that helps private and public sector organizations avert threats, close gaps, and effectively manage risk. By providing independent and tailored advice, assessments, technical testing, and cyber engineering services, we help clients develop scalable programs that improve their security posture, achieve their business objectives, and fuel their continued success. Coalfire has been a cybersecurity thought leader...

Keeper Security is the world's leading cybersecurity software company for securing and managing passwords and digital assets online. We were founded in 2011 and protect millions of consumers and thousands of business clients globally with our best-in-class encryption technology.

Vector Security® has protected people and property by providing intelligent security solutions tailored to the needs of the customer for more than 50 years. Through a network of branches and authorized dealers, we design, install and monitor Vector Home Security and Vector Business Security systems for hundreds of thousands of homes, businesses and multi-site retail chains across North America and...

Cubic Corporation (Cubic) is an international provider of systems and solutions that address the mass transit and global defense markets.

GlassHouse Systems (GHS) is an infrastructure, security, and managed services solutions provider who develops, designs and deploys solutions for leading enterprises in Canada and the US. For over 30 years, GHS has delivered an enterprise level of service and support to clients. Recognized with industry leading awards each year, GHS translates this differentiation into positive client experiences. GHS believes that...

For more than 65 years, VSC Fire & Security, has partnered with thousands of customers as a trusted contractor for the inspection and installation of fire sprinkler, fire alarm, security, life safety and low voltage systems. VSC Fire & Security, has over 1,800 talented employees, and more than 950 vehicles throughout our footprint which spans the East Coast, and West...

GTT is a managed network and security services provider to global organizations. We design and deliver solutions that leverage advanced cloud, networking and security technologies. We complement our solutions with a suite of professional services and exceptional support teams in local markets around the world. We serve thousands of national and multinational companies with a portfolio that includes SD-WAN, security,...

Pinkerton traces its roots to 1850 when Allan Pinkerton founded Pinkerton's National Detective Agency. Today, Pinkerton offers organizations a range of comprehensive risk management services from security consulting and investigations to executive protection, employment screening and protective intelligence. With employees and offices worldwide, Pinkerton maintains an unmatched reputation for protecting clients and their assets around the globe.

Silver Star Protection Group is a fully integrated security partner that combines physical protection, advanced security technology, secure transport, and risk consulting to protect assets and people.

Marksman Security Corporation is a public safety company that offers security guards and residential security services.

Nerdio is a premier software solution provider, supporting organizations of all sizes looking to deploy, manage, and cost-optimize native Microsoft technologies. We partner with Managed Service Providers (MSPs) and enterprise organizations all over the world to add value on top of their existing Microsoft investments like Azure Virtual Desktop, Windows 365, and Microsoft Intune. Our software helps MSPs and IT pros...

At General Dynamics Mission Systems, a business unit of General Dynamics, we develop mission critical C4ISR solutions across the land, sea, air, space and cyber domains, but that doesn’t tell our whole story. When downed pilots are isolated in enemy territory, our equipment gives them a lifeline to call home. When a student opens a textbook to learn about the universe,...

Spectrum San Diego is a high tech security innovator, specializing in ultra-low-dose X-ray screening systems.

Motorola Solutions is a global technology company that provides mission-critical communications, video security, and command center software to help protect people, property, and places for public safety agencies and enterprises.

Security Industry Specialists, Inc. (SIS) provides innovative and customized security solutions and services for people, assets, and facilities, catering to Fortune 500 companies, international events, and high-profile clients.