Mattermost

Mattermost is an open-source, self-hostable collaboration platform for developer and engineering teams. Channels, threads, calls, workflows, and integrations — without the data leaving your network. Used by US DoD, NASA, and thousands of enterprises.

Founded: 2015
Category: Open Source
Funding: VC-backed

Every fact above is shown only where it could be checked against a source: funding against a primary source, backers against the investor’s own directory, and a location only where the company names that city on its own site. A row that is absent is one we could not source, not a zero. The summary is a written description of the company. Category is our own classification. Spotted something wrong? Tell us.