One issue is that different teams use different messaging services. Lyft’s product and engineering teams use Slack, while some in the legal and HR teams use Google Hangouts, said an employee. Mr. Morelli, echoing efforts by Lyft’s “internal communications team,” urged more people to use “Facebook for Work.” That way more workers could get on the same page on company-wide matters, he suggested.

From an article cited by Stowe Boyd