Counterpane Internet Security Inc, which provides security-monitoring services, said yesterday it has secured $20m in series D funding from new and existing investors. The company will put the money towards growing its sales and marketing activities.

The Cupertino, California-based firm said it saw over 30% revenue growth quarter over quarter in the fourth quarter. Counterpane said it managed to maintain in excess of 30% growth every quarter last year. The private firm does not disclose its revenue.

The round was led by new investors, Comcast Interactive Capital and Meritech Capital Partners, and included contributions from existing investors Accel Partners, Bessemer Venture Partners, Dell Ventures, Morgan Stanley Venture Partners and Symphony Technology Group.