Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..
bridge between mattermost, IRC, gitter, xmpp, slack, discord, telegram, rocketchat, twitch, ssh-chat, zulip, whatsapp, keybase, matrix, microsoft teams, nextcloud, mumble, vk and more with REST API (mattermost not required!)
Save or export your private and public Slack messages, threads, files, and users locally without admin privileges.
