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Best AI research and search tools Answer engines and research assistants ranked for source quality, depth and price.
Quick answer Gemini Notebook for your own sources; ChatGPT for deep research on the web.
🏆 Top pick
G 88 Free, grounded in the sources you upload, with higher limits in Google AI Pro.
💰 Good value 🌱 Beginner-friendly
Free · Google AI Pro $19.99/mo for higher limits
Free and grounded in your own sources Higher limits bundled in Google AI Pro Daily or monthly quotas apply, depending on your plan
Score breakdown and plans Free $0Google AI Pro $19.99/mo
C 84 Deep research inside ChatGPT.
Free tier · Go $8/mo · Plus $20/mo
Chat, images, voice, deep research and Codex in one subscription Low-cost Go tier at $8 Plus has no annual billing option
More pros, cons and scores Chat, images, voice, deep research and Codex in one subscription Low-cost Go tier at $8 Image creation, voice, deep research and Codex included Plus has no annual billing option Allowances are not published as fixed numbers, and ChatGPT Work shares usage with Codex Pro tiers start at $100 Price source: official pricing page
C 78 Built for finding evidence in peer-reviewed papers, $20 a month for Pro.
🆓 Top free option
Free tier · Pro $20/mo
Evidence from published papers Low annual price ($12/mo) Deep Reviews capped at 15 a month
More pros, cons and scores Evidence from published papers Low annual price ($12/mo) Deep Reviews capped at 15 a month Price source: official pricing page
E 77 Literature review workflows for academics; paid plans are billed annually.
Free Basic · Plus $11/mo billed annually
Built for literature review Free Basic plan Month-to-month prices were not shown on the pricing page
More pros, cons and scores Built for literature review Free Basic plan Month-to-month prices were not shown on the pricing page Pro tiers are priced per user Price source: third-party reports, so check the official site
Compare all 5 Editorial scores out of 100, not test results. Scroll sideways on a phone.
Not ranked until we can confirm it We could not confirm the plans, prices or features of these tools on official pages in our latest review, so they are not ranked here and Help me choose does not suggest them. Their catalog pages show what we checked.
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