A voice activated knowledge management system may be used as a virtual assistant. In some cases, a knowledge management system may be configured to receive a voice request from a user, generate and send a knowledge base query to each of the two or more different knowledge base engines, and fuse the resulting responses from the knowledge base engines, resulting in a fused response. The fused response may be provided back to the user as a response to the voice request and/or may be provided as a device command to control a corresponding device.