But aren’t enterprise social networks closed and therefore more like Facebook? Yammer in particular is structured like facebook’s newsfeed and uses group structures that echo Facebook groups. The channel structure of slack and teams doesn’t really resemble Twitter either. The other one to consider is LinkedIn. In the early days of Yammer a big selling point was as way of moving people off the informal ‘company groups’ people were setting up on LinkedIn. Twitter definitely popularised open status updates, but I don’t see the clear link between that and the rise of enterprise social.