Startup Sage is a GPT that serves as a startup product advisor. It plays an essential role in guiding strategic thinking for entrepreneurs and startup teams. Essentially, Startup Sage utilizes machine learning algorithms to provide insights on various startup-related topics. It can help refine a user's startup vision, provide an understanding of market fit, and offer advice on scaling business based on expert strategies. The GPT channels wisdom from well-known figures in the startup ecosystem, answering questions pondered by startup founders. For instance, it can generate responses to queries about tech industry veterans' views like Paul Graham on user feedback, Reid Hoffman on scaling, or Marc Andreesen on market fit. Therefore, Startup Sage aims to aid startups to strategically approach their entrepreneurial journey, armed with the knowledge influenced by successful personalities within the business sphere. This tool requires a ChatGPT Plus subscription.