Slack just raised another $200 million round, and it's now worth $3.8 billion

Slack CEO Stewart ButterfieldSlackSlack CEO Stewart Butterfield

Slack just confirmed that it’s raised $200 million at a $3.8 billion valuation, confirming what Business Insider had previously reported.

The new round was led by Thrive Capital with participation by GGV, Comcast Ventures, and Slack’s existing investors, including Accel and Social Capital.

Slack has raised $540 million in total so far. The messaging app officially launched a little over two years ago.

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