Note that Slack was not the only or first software-as-a-service solving this problems. There were others, some even earlier. E.g. Flowdock https://www.crunchbas

Note that Slack was not the only or first software-as-a-service solving this problems. There were others, some even earlier. E.g. Flowdock https://www.crunchbase.com/organization/flowdock https://www.crunchbase.com/organization/flowdock Slack led the markets with best execution (maybe?) and good funding. Until Microsoft came around with its own unique non-replicable assets and skills.