Task management software company ClickUp said on Wednesday it was valued at US$4 billion after a US$400 million funding round that was co-led by venture capital firm Andreessen Horowitz and technology investment firm Tiger Global Management. The Series C round, which brings the total amount raised by the San Diego-based company to over US$535 million, also drew investments from Lightspeed Venture Partners and Meritech Capital Partners. ClickUp, founded in 2017, offers an all-in-one productivity platform to its customers which includes features such as project management, document collaboration, and spreadsheets among others.