Hey, Mattermost PM here. There is a hosted SaaS version of Mattermost as well. We don't have an established non-profit license for it yet, but you can contact

Hey, Mattermost PM here. There is a hosted SaaS version of Mattermost as well. We don't have an established non-profit license for it yet, but you can contact community[at]mattermost.com and we'd be happy to discuss options.