Seattle-based Usermind, providers of a unified customer engagement hub, has closed a $23.5 million Series C round. The investment was led by Northgate Capital, with follow-on investments from existing investors Andreessen Horowitz, Menlo Ventures and CRV.

Northgate Capital managing general partner and CEO Hosein Khajeh-Hosseiny is joining Usermind’s board.

[Image courtesy: Usermind]