Category guide91 tools documented
Students, analysts, founders and developers all search the web for answers, but they need different things from it. Some want cited reports, some want to analyze spreadsheets or PDFs, and some want raw data feeds for their own agents. This page covers 91 tools in the Research & search category, including AI research tools for academic, market and data work. Perplexity is an AI answer engine that searches the web and replies with cited sources, Liminary and Innogath link source citations, and Crunchbase covers private company data.
The biggest difference is how you pay. Of the 91 tools, 60 offer a free plan or free credits and 61 list a verified starting price. Many bill by credit packs or one-time purchases rather than a monthly subscription, such as Owlytics.ai at $29.99 per pack, while others charge flat monthly or annual fees.
Prices, plan names and limits come from each vendor's own US pricing page, recorded as published with the check date; unconfirmed prices are labelled. How we review.
Lowest fixed monthly price per pick, USD, as published by the vendor.
| # | Tool | Score | Pick it for | Models / engine | Starting price | Free tier | Platforms |
|---|---|---|---|---|---|---|---|
| 1 |  PerplexityCited web research and quick fact-finding on the free tier; Pro adds Deep Research volume and file work. |
9/10+3 Verified USD price; +2 Lasting free plan; +1 API or integrations documented; +2 Documented limits, setup and FAQ; +1 Checked in the last 30 days | Cited web answers | Pro Search model picker lists GPT-5.4, Claude Sonnet 4.6, Nemotron 3 Super 120B; GPT-5.5 … | $10/mo (Education Pro (consumer, verified students/faculty)) all plans |
Yes | Web, API |
| 2 |  ApodexStep-by-step verified, cited briefs on hard questions, paid per use with credits, Premium at $50 per month. |
9/10+3 Verified USD price; +2 Lasting free plan; +1 API or integrations documented; +2 Documented limits, setup and FAQ; +1 Checked in the last 30 days | Verified cited briefs | not stated by vendor | $50/mo (Premium) all plans |
Yes | Web, API |
| 3 | Noah AI Cited biomedical search and deep research on a credit system, Starter at $148.80 per year. |
8/10+3 Verified USD price; +2 Lasting free plan; +2 Documented limits, setup and FAQ; +1 Checked in the last 30 days | Life science research | not stated by vendor | $148.8/yr (Starter) all plans |
Yes | Web |
| 4 |  InnogathCited research reports with branching pages and diagrams, Pro at $9.60 per month. |
8/10+3 Verified USD price; +2 Lasting free plan; +2 Documented limits, setup and FAQ; +1 Checked in the last 30 days | Students, cited reports | not stated by vendor | $9.6/mo (Pro) all plans |
Yes | Web, Desktop |
| 5 | DataLumio Survey, spreadsheet, transcript and PDF analysis from one shared credit balance, Starter at $5 one-time. |
8/10+3 Verified USD price; +2 Lasting free plan; +2 Documented limits, setup and FAQ; +1 Checked in the last 30 days | Students, data analysis | not stated by vendor | $5 (Starter) all plans |
Yes | Web |
| 6 | Pandada AI Code-free analysis of Excel files and PDFs, free within daily limits or Plus at $19 per month. |
8/10+3 Verified USD price; +2 Lasting free plan; +2 Documented limits, setup and FAQ; +1 Checked in the last 30 days | Spreadsheet and PDF analysis | not stated by vendor | $19/mo (Plus) all plans |
Yes | — |
| 7 |  feynn.aiSource-cited company research and strategic simulation, 30 free credits and Pro at $20 per month. |
8/10+3 Verified USD price; +2 Lasting free plan; +2 Documented limits, setup and FAQ; +1 Checked in the last 30 days | Company research | not stated by vendor | $20/mo (Pro) all plans |
Yes | — |
| 8 |  GatsbiTakes a research idea to a manuscript, systematic review or patent disclosure draft, Monthly Pro at $19.99. |
8/10+3 Verified USD price; +2 Lasting free plan; +2 Documented limits, setup and FAQ; +1 Checked in the last 30 days | Academic writing | ChatGPT versions or hybrid of Qwen, DeepSeek etc.; OpenAI as provider; no user choice | $19.99/mo (Monthly Pro) all plans |
Yes | Web, Desktop |
| 9 |  GetTheGistsQuick summaries or spoken explanations of long documents in Chrome, with a free tier and Premium at $9.99 per month. |
8/10+3 Verified USD price; +2 Lasting free plan; +2 Documented limits, setup and FAQ; +1 Checked in the last 30 days | Summarizing long documents | not stated by vendor | $9.99/mo (Premium) all plans |
Yes | — |
| 10 |  Gemini Notebook (formerly NotebookLM)Answers, summaries and study aids grounded in documents you upload, with up to 50 sources per notebook on the free tier. |
6/10+1 Price listed, not vendor-confirmed; +2 Lasting free plan; +2 Documented limits, setup and FAQ; +1 Checked in the last 30 days | Research from your files | Gemini models; Veo, Omni, Nano Banana for generated outputs | Not published all plans |
Yes | Web, Mobile |
AI answer engine that searches the web and replies with cited sources, plus developer search APIs.
Free stops at: Practically unlimited basic searches, Very limited amount of Pro Searches
Verified perplexity.ai (opens Perplexity website in a new tab)
Free · paid from $10/mo US · checked Sep 30
AI research assistant that reasons through hard questions step by step and returns cited, verified briefs instead of chat replies.
Free stops at: 300 free credits to start on Pay-as-you-go.
Pricing US price unconfirmed
AI agent for life science and pharma research, with search, deep research and database queries on a credit system.
Free stops at: 300 credits on signup
Free · paid from $12.40/mo US · checked Sep 29
AI research workspace that turns questions into cited reports, branching pages and diagrams, with Free, Pro and Ultra plans.
Free stops at: 500 credits per month, 1 concurrent research
Free · paid from $9.60/mo (billed yearly) US · checked Oct 2
AI data analysis tool for qualitative and quantitative data, with data cleaning, dashboards and PDF chat on a shared credit system.
Free stops at: Page says start free but no free tier was listed.
Verified datalumio.co (opens DataLumio website in a new tab)
From $10/mo US · checked Sep 29
AI data analysis tool for Excel, PDFs and data files, producing reports without code.
Free stops at: 5 chats/day, 5 searches/day
Free · paid from $19/mo US · checked Oct 4
AI strategic intelligence platform: source-cited company research, signals, game-theory simulation and board-ready recommendations.
Free stops at: 30 credits one-time
Free · paid from $20/mo US · checked Oct 4
AI research assistant for idea discovery, academic paper drafting, systematic reviews and patent disclosure drafts.
Free stops at: 1 day of access, No document export
From $19.99/mo US · checked Sep 29
Chrome extension that summarizes web pages, answers questions by chat or voice and combines open tabs into one brief.
Free stops at: 50 summaries per month, 5 min voice per month
Verified getthegists.com (opens GetTheGists website in a new tab)
Free · paid from $9.99/mo US · checked Sep 29
Google's AI research partner that answers questions and creates summaries, audio and slides grounded in your own sources.
Free stops at: Standard limits for chat and generation of Slides, Audio Overviews and other artifacts, Up to 50 sources per …
Verified notebook.google (opens Gemini Notebook (formerly NotebookLM) website in a new tab)
Free plan available US price unconfirmed
Yes. 60 of the 91 tools in this category offer a free plan or free credits. Examples include Pandada AI, free within daily limits, and Nodalist AI, which starts with 250 free credits.
DataLumio lists a $5 one-time Starter plan, and Nodalist AI lists Starter at $5.99 per month. Prices come from each tool's own pricing page and may change.
Innogath (Pro, $9.60 per month), DataLumio ($5 one-time Starter) and Pandada AI (Plus, $19 per month) are all described as fits for students. Now I Get It! charges per credit from $3 for plain-language versions of scientific PDFs.
Noah AI is built for life science and pharma professionals who want cited biomedical search and deep research. Its Starter plan is $148.80 per year, and it also has a free option.
For academic work, Gatsbi goes from research idea to manuscript or systematic review (Monthly Pro $19.99, 1-day free trial), Noah AI covers cited biomedical research (free Basic, Starter $148.80 per year), and Now I Get It! turns scientific PDFs into plain-language pages from $3 per credit.
Perplexity searches the web and cites sources for each answer. NotebookLM (now Gemini Notebook) answers only from the documents you upload. Use Perplexity to find sources and NotebookLM to study them.
Browse all 91 tools with filters
Related: Chat assistants · Productivity & writing
Each pick is scored 0–10 from facts in its verified profile, not from popularity or payment. The score is shown in the table; hover it for the breakdown.
We have not benchmarked output quality; this ranks what each vendor publishes and how well we could verify it. No paid placements. How we review.
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