Which AI engine recommends brands most frequently in search results?

Microsoft Copilot is the most likely AI engine to recommend specific brands, naming them 40.1% of the time across the 17 categories tracked by PressGEO. In contrast, ChatGPT is the least likely to name brands, with a citation rate of 31.6%. These findings, part of The PressGEO AI Visibility Index — Q4 2026, show that across all 368,553 recorded answers from five major engines, a tracked brand was named in 36.8% of the responses, reflecting how different platforms approach brand recommendations.