Slack also makes formatting text and sharing code easier than many communication platforms with shortcuts on the default messaging toolbar. While Slack offers many of the same features as other communication tools, including Microsoft Teams and Discord, the user interface is streamlined and will be less intimidating for most users, making the tool more lightweight in comparison. Familiar functions such as adding attachments, using Emojis, mentioning users, and reacting to individual posts are available. However, communication with people outside the, team, such as vendors or business partners may be more difficult.

Because of this focus on teams, using Slack for multiple jobs, teams, or projects is more organized than it would be with other tools because users such as freelancers can simply sign into another workspace. Workspaces are further broken into channels, and users can send direct messages to other people. The basis of this communication happens in workspaces, to which administrators must invite team members, reducing the risk of spoofed emails and phishing attacks. Slack can be used from practically any device in the browser, too.

iOS, Android, Windows, macOS, and Linux users can all install Slack, although the Linux version is still in beta. Corporations, contractors, freelancers, and even some individual users all rely on Slack to send messages and share documents with individual users and groups across a variety of operating systems and devices. Since 2013, Slack has been at the forefront of professional communication.

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