Today, more and more buyers are beginning their journey with an AI-search. They may ask ChatGPT to compare products or use an AI-powered platform like Perplexity. Or, they're just Googling an offering and reading the AI Overview, all without clicking a link.  HubSpot realized that our buyers were moving from search engines to answer engines like ChatGPT, Gemini, and Perplexity — but we had no reliable way to measure AI visibility and understand whether our AEO plays were working. So, in June 2025, the HubSpot Marketing team started working with XFunnel, an AEO tool that allowed us to measure and optimize our AI visibility across ChatGPT, Gemini, Perplexity, and more.…