Previously known as Facebook Work, Workplace combines social network, chat messenger, and productivity features to help teams work together online. The app includes groups, custom profiles and ad-free news feeds, including tools for team members to make audio and video calls as well as host live broadcasts.
There's also something called Multi-Company Groups, which allows employees from different organizations to work together.
Workplace is free for non-profits and schools, but Facebook will charge commercial users of the platform $3 per month for organizations of up to 1,000 people, and as low as $1 per month for organizations comprising over 10,000 employees.
That contrasts with Slack's Standard plan of $6.67 per user and its Free tier, which has some search and archive limitations.
Workplace exists as a web interface and an iOS app similar in style to Facebook's other mobile offerings. The app is a free download for iPhone and iPad available on the App Store. [Direct Link]