Microsoft Teams is now available for private and small business groups, which don’t have a Office 365 subscription.
The free Version offer the following features for up to 300 people:
Unlimited chat messages and search.
Built-in audio and video calling for individuals, groups, and full team meetups.
10 GB of team file storage plus additional 2 GB per person for personal storage.
Integrated, real-time content creation with Office Online apps, including built-in Word, Excel, PowerPoint, and OneNote.
Unlimited app integrations with 140+ business apps to choose from—including Adobe, Evernote, and Trello.