What are some voice-guided robotics platforms available on the market today?
It’s not clear to me what you mean by robotics platform. Do you mean robotic products? Do you mean software platforms? Do you mean hardware platforms? Similarly, there are vast differences between simple voice control, such as IVR, and more complex speech recognition, as well as interactive speech synthesis. You can get some idea of the speech technologies associated with robotics from my Robotics Resources Meta Guide.