Perplexity is the strongest fit for mapping a competitive landscape with cited sources, since it searches the live web and returns answers with inline citations you can verify and trace back to primary sources. It can surface market size figures, competitor positioning, funding rounds, and analyst commentary in a single query, making validation fast. Gemini Pro is worth considering if you want deeper integration with Google Search data and a longer context window for synthesizing large documents. ChatGPT with browsing enabled covers similar ground and excels when you need to iterate on the analysis through a longer conversation.