Team communication
for the 21st century.


Organize your team conversations in open channels. Make a channel for a project, a topic, a team, or anything—everyone has a transparent view of all that’s going on.

Private Channels

For sensitive information, create private channels and invite a few team members. No one else can see or join your private channels.

Direct Messages

To reach a colleague directly, send them a Direct Message. It's completely private and secure.

Drag, drop, and share your files.

Not just your messages, but all your files, images, PDFs, documents, and spreadsheets can be dropped right into Slack and shared with anyone you want. Add comments, star for later reference, and it’s all completely searchable.

If you use any services like Google Drive, Dropbox, or Box, just paste the link and that document is immediately in sync and searchable too.

All your tools in one place.

Connect all the tools you use to Slack and avoid all that constant switching between apps. Set up your integration so that you get all your notifications directly within Slack—from support requests, code check-ins, and error logs to sales leads—all of them searchable in one central archive.

Everywhere you go.

With fully native apps for iOS and Android, whatever you do on one device is reflected everywhere. Everything is in sync. We’ll keep your place so you can always pick up wherever you left off.

See all apps

Customize your notifications whether you’re on your computer or mobile device. Dial them up to be alerted about everything or dial them down to focus on just a few things.

Ready to give it a try?

Slack is most useful, and a lot more fun, when the whole team is exploring it together. Check out these handy guides featuring our best tips and other helpful information for getting started.

Getting Started with Slack

Slack is free to use for as long as you want and with an unlimited number of people.

You can easily upgrade to our paid plans, which offer more features and controls.