His LinkedIn profile lists manas.ai, which is pretty new, and inflection.ai, which has been around for a few years. Inflection released Pi, which was the first chatbot I encountered that kept conversations very interactive by asking clarifying and follow-up questions, whereas ChatGPT and others were very transactional.

However it is probably known more (if at all) for being the company Microsoft "Windsurfed" by licensing all its tech and poaching its leadership team, including the dude who's the current "CEO of AI" at MSFT.