Coinsquare is one of the leading Canadian cryptocurrency exchanges. While other companies attempt to present themselves as global entities, this one puts a very strong emphasis on its origin and this shows in the service provided.
Apparently, the exchange is built on the same technology as the New York Stock Exchange. The system is 100% in-house built, and it has been stress-tested under various hypothetical scenarios, such as DDoS attacks. The exchange’s record in this regard is rather impressive as well: since 2015, it has not lost a single coin.