Slack raises $200m in series B round

Messaging star-up Slack has raised $200m in its latest financing round, led by Thrive Capital, at a valuation of $3.8bn. This cash injection could be used to boost Slack's advertising campaign, which has recently included TV and outdoor ads. Co-founder Stewart Butterfield has also expressed an interest in recruiting talent from other technology businesses and hopes the $450m raised to date will help to cement Slack's position as a leader and a stable company with an 'uncompromising long-term, strategic view.'

Messaging startup Slack has raised $200m in its latest financing round to give the company a valuation of $3.8bn.

The service has raised $450m to date, raising $160m in its last round a year ago. Thrive Capital led the latest fundraiser, with contributions from GGV, Comcast Ventures alongside previous investors Accel and Index Ventures.