What are some alternatives?
When comparing Slack for Mac and Slack, you can also consider the following products
Slack Beta - A faster and nicer Slack built on Electron
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Workplace by Facebook - Connect everyone in your company and turn ideas into action.
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.
Tandem - Get fluent together. Practice languages, anytime, anywhere.
Bitrix24 - Bitrix24 is a free (for small businesses) social enterprise platform. It is a united work space which handles the many aspects of daily operations and tasks. Create your own social intranet in minutes!