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Best Slack Alternatives

Slack — Team chat. Looking for something free, open-source, or just different? The best alternatives are: Discord, Mattermost, Microsoft Teams.

AlternativePrice
Discord
Free, great voice channels, huge communities		Freemium
Mattermost
Self-hosted, open-source		Free
Microsoft Teams
Bundled with Microsoft 365		Freemium

Frequently asked questions

What is the best free alternative to Slack?

Discord — free, great voice channels, huge communities.

Is there an open-source alternative to Slack?

Check the list above — open-source options are marked where available.

Why look for a Slack alternative?

Common reasons: price, privacy, a simpler interface, no account required, or a specific missing feature. The right alternative depends on which of those matters to you.