Chat is almost as old as the internet itself. But this year, investors and big tech companies alike treated workplace messaging as the next big thing. Slack announced a $250 million investment in September from Japanese tech company SoftBank, bringing its total funding to $790 million and boosting its valuation from $3.8 billion to $5.1. In June, rumors surfaced that Amazon wanted to buy the company for as much $9 billion.
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