I love Slack, but there's always the question that is it worth the monthly fees and related overhead. So far the answer is yes, but for example Microsoft is alr

I love Slack, but there's always the question that is it worth the monthly fees and related overhead. So far the answer is yes, but for example Microsoft is already trying to push competing offering via Office 365. If Google and Amazon follow the same path with their groupware offerings, this may hurt Slack sales. And it's not just about the price and quality of product, but also about the convenience. Do you deal with one vendor or do you have 10 different SaaS subscriptions you need to deal with. One interesting option would be for Slack and Dropbox to merge. Don't know if this kind of deal could ever work out financially, but I think the combination would be quite interesting.