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7 free AI research assistant tools that work without an API key -- Perplexity, Consensus, ChatGPT, Gemini, and more. We tested each on the same research task and measured output quality, speed, and actual free limits. No credit card, no API setup, no coding required.
An AI research assistant gathers, analyzes, and reports information automatically. We explain how AI research assistants work, what they cost ($0.02-$0.15 per task), and compare the 5 best tools for 2026. Includes setup guide and real output examples.
Looking for the best AI research assistant or research helper? We tested 8 AI research tools -- Perplexity, Claude, Consensus, Ivern, ChatGPT, Gemini, Elicit, NotebookLM -- on the same research tasks. Real output examples, cost per report ($0.02-$20), and which tools produce finished deliverables vs just summaries. Updated April 2026.