Slack just raised another $200 million, and is now worth an estimated $3.8 billion

Photo: supplied.

Slack, a business messaging app, has just raised $US200 million at a $US3.8 billion post-money valuation.

The company, which opened its Asia-Pacific HQ in Melbourne last week, made the US raise with Thrive Capital, and Slack’s existing investors, including Accel, Index Ventures and Social Capital. The latest round brings the company’s total funding to $US540 million.

This time last year Slack raised $US160 million at a $US2.8 billion valuation.

“As has always been the case, we are taking this opportunity to further secure our leadership position as we continue to execute on our ambitious growth plans. This capital adds to our existing reserves and increases our ability to focus on an uncompromising long-term, strategic view,” co-founder and CEO Stewart Butterfield said.

In the three years since the company was founded off the back of a failed video game company, Glitch, it has amassed 430 employees plus 2.7 million daily active users, including 800,000 paying subscribers. It is considered the fastest growing app in the history of the internet.

Part of the latest round of funding is expected to go towards Slack’s first attempt at global TV marketing, which will roll out in the States this week.

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