Speaking on stage at its Office event, Microsoft announced that the preview of Microsoft Teams kicks off today, November 2, in 181 countries. In addition, Teams is already localized in 18 different languages, and is included in all Office 365 Business and Enterprise suites. While the preview is available now for Office 365 Business users, Microsoft also announced that it expects Teams to be generally available in the first quarter of 2017.
To recap, Microsoft Teams was only just announced as Microsoft's competitor to Slack in the collaborative workplace chat space. The service not only provides an easy way to communicate with others via text chat, but it also features video chat integration over Skype, integration with other Office 365 services and much more. For more, be sure to check out our Microsoft Teams announcement post.
As for platforms, Microsoft says that Microsoft Teams is available on the web, as well as for Windows (including Mobile), Mac, Android and iOS.