Free Alternatives to Slack 2026: 8 Tools Tested
Top Alternatives to
FAQs
What is the best free alternative to Slack?
Microsoft Teams is the best free alternative. It offers unlimited chat, 100-participant meetings, and Office document collaboration. If you already use Microsoft 365, Teams is included at no extra cost.
Does Slack free tier have unlimited messages?
No, Slack free tier limits message history to 90 days. After 90 days, old messages are archived and not searchable. Paid plans start at 7.25 dollars/user/mo for unlimited history.
Is Discord good for business communication?
Yes, Discord works well for small teams. It offers unlimited message history, voice channels, and screen sharing for free. However, it lacks enterprise features like compliance, SSO, and admin controls.
Can I self-host a Slack alternative?
Yes, Mattermost, Rocket.Chat, and Element all offer self-hosting options. Self-hosting gives you complete data control but requires server management. Free community editions are available for all three.
Which alternative has the best threading?
Zulip has the best threading model. Every conversation is organized by topic, making it easy to follow multiple discussions. Slack threads are nested under messages, which can get cluttered in busy channels.
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