Prose offers an open source alternative to Slack and Teams, with plans and information for large nonprofits and education groups.
Slack
Slack provides team communication with an interface described as faster and more organized than email.
About Slack
Slack provides team communication with an interface described as faster and more organized than email.
Slack is an online tool in our Messaging Apps collection, part of the Social & Communities directory. It runs in your web browser, so there's nothing to install.
People usually find Slack when they’re looking for messaging.
Not quite what you need? Close alternatives include Prose, Altus, and matterbridge — compare them below.
Slack at a glance
- Category
- Social & Communities › Messaging Apps
- Type
- Online tool
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Automated check blocked
- Listed
- Oct 5, 2026
Slack alternatives
Tools and sites you could use instead, ranked by how closely they match.
The Altus desktop client packages WhatsApp Web with themes and notifications, providing a desktop interface for messaging.
Open sourcePick
24 alternatives
Matterbridge connects chat platforms including IRC, Slack, Discord, Telegram, Matrix, and Mattermost through message bridges.
Open source
24 alternatives
Mumble provides free open source, low-latency voice communication for online groups and gaming sessions.
Free
24 alternatives
TeaSpeak provides VoIP communication through web and native clients, with project pages for downloads and community support.
Free
24 alternatives
Twist organizes team collaboration through asynchronous written conversations in a messaging app.
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Slack FAQ
What is Slack?
Slack provides team communication with an interface described as faster and more organized than email.
Can I use Slack in my browser?
Yes. Slack works on the web, so you can use it from any modern browser without installing anything.
Is Slack working?
The automated check was blocked on Oct 5, 2026, so it could not confirm whether camel-kwr1314.slack.com was available. You can try its website directly.
What are the best alternatives to Slack?
Popular alternatives to Slack include Prose, Altus, matterbridge, and Mumble. We list 12+ options matched by topic, tags and features.
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