Benchmark Capital is investing in Danish startup Zendesk, and led a $6 million B round of funding. Benchmark’s rock star partner Peter Fenton is joining the board.

Zendesk just raised money in May in an A round from Charles River Partners, which also participated in this latest funding.

The company offers Web-based help desk services for companies to offer support to their customers. It is an online ticketing system for customer support, which ranges in price from $9 to $39 per support agent per month, after a one-month free trial. Corporate customers include Rackspace, Condé Nast, Twitter, MSNBC and Scribd.