Mattermost makes case for open source as team messaging market booms

The team collaboration market may be dominated by Slack, Microsoft and other large cloud vendors, but some believe that open-source messaging tools will also find a place among large organizations.

Mattermost is one of a handful of vendors — along with Zulip, Rocket.Chat and others — taking an open-source approach to team chat. The company has been attracting attention from investors following deployments at organizations as diverse as Uber, Airbus and the Department of Defense. “People want an open-source alternative because they need the trust, the flexibility and the innovation that only open source is able to deliver,” said Ian Tien, co-founder and CEO of Mattermost, an open-source team messaging tool that launched in 2015.

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