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.
Mark Kostiw came out and installed our card access system. He did a great job, very organized and the job was completed beyond our expectations. Would highly recommend Square Security
Excellent service with a smooth installation process. Their 3-year warranty gives us peace of mind. Highly recommend for their security solutions! Really helpful!
I had a fantastic experience with Square Security Systems! Recently, they replaced my access card fob, and I couldn’t be happier with their service. From start to finish, the process… read more 
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:
