Perplexity is the strongest fit for this task because it combines live web search with cited sources, letting you pull real competitor data and market sizing figures with traceable references in a single session. It can synthesize information from analyst reports, news, and company pages while surfacing the URLs so you can verify every claim. Claude Sonnet is a solid alternative when you want to structure and analyze raw data you already have or need a deeper synthesis pass on gathered information. ChatGPT is worth considering if you want to combine browsing with its built-in data analysis features in one interface.