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Mattermost is an open-source, self-hostable online chat service with file sharing, search, and integrations. Designed as an alternative to Slack, it was founded by a Canadian-led team and is widely used by enterprises and governments for secure communications.

Pidgin is a free and open-source multi-protocol instant messaging client. Canadian open-source developers have long been contributors to Pidgin and its underlying libpurple library, which supports dozens of chat protocols.

Accessible, multilingual front-end framework used across Government of Canada websites.

API backend for GC Notify, a notification platform for government services.