When Mark Kostiw founded Square Security Inc. over a decade ago, the goal was straightforward: provide Toronto businesses with high-quality security solutions delivered through a streamlined, efficient installation process. Today, Square supports commercial clients across Ontario with customized system designs tailored to their operational needs, installed by a seasoned and highly skilled team.
Thank you, Mark!
Square Security did a great job on the install.
Excellent service with a smooth installation process. Their 3-year warranty gives us peace of mind. Highly recommend for their security solutions! Really helpful!
Quick installation and wonderful team 
We design and install security systems for organizations of every size—from small local businesses to complex, multi-site enterprise deployments for some of Canada’s largest companies.
We serve Toronto and Southern Ontario, including:
