What is Slack?

Slack is the channel-based messaging platform that organizes team communication by topic. It integrates with thousands of tools, supports huddles and clips, and replaces long email threads with searchable conversations. Free tier limits message history; paid plans unlock archives and workflow automation.

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   Discord

   Your place to talk
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   Telegram

   A new era of messaging
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   Mattermost

   Open source platform for developer collaboration
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   Rocket.Chat

   The communications platform you can fully control
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   Element

   Secure messaging on the Matrix network
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   Microsoft Teams

   Chat, meet, and collaborate in one place

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