Web research vs document research tools
By Give AI Tool · Research methodology
Published 21 Oct 2026
“AI research tool” covers two different jobs. Some tools answer open questions from the web and cite what they used. Others work over academic papers and help you screen, extract and check them. Picking the wrong one wastes time. This guide uses the vendors’ own pages; we have not run searches with these tools.
Web research with citations
Perplexity answers questions with inline citations and lets you choose between several AI models. Its Pro plan is listed at US$17 a month and Max at US$167 when billed annually, and the page says both are for personal use. The page does not publish numeric limits for its free plan.
Use a tool like this when your question is about current events, products or general topics and you want to open the sources yourself.
Academic papers
- Elicit: the free Basic plan lists unlimited search across 138 million papers, unlimited summaries and chat with full-text papers. Pro ($49 per user a month on annual billing) adds a systematic review workflow that screens 5,000 papers and extracts 20 columns at a time.
- Consensus: the Free plan lists basic paper search, 10 Pro messages and up to 3 Deep reviews a month. Pro is $12 a month on annual billing, with unlimited Pro messages and 15 Deep reviews.
- Scite: built around Smart Citations that show how papers cite each other. Basic is $12 a month on annual billing after a 7-day trial, and Pro ($40) adds API access.
Use these when you need peer-reviewed evidence, structured extraction, or to see whether later work supports or disputes a paper.
How to decide
- If your question is about the web, start with a web tool. If it is about the research literature, start with a paper tool.
- If you need to extract the same details from many papers, look at Elicit’s columns.
- If you need to vet a single paper, look at citation context.
- If you will build on the tool, check the API: Elicit and Scite list it on Pro, and Consensus includes API and MCP uses on paid plans.
Whatever you use
Open the cited sources and read the passages the answer relies on. A summary points to evidence; it is not evidence. Prices on these pages are annual-billing figures shown per month, and several do not name their currency.
Related tools
Research
Perplexity
Answer engine with inline citations, a free plan, and Pro and Max tiers.
Best for: Researching questions where inline citations to sources matter
From $17/mo, billed annuallyChecked 21 Oct 2026Research
Elicit
Research assistant for academic papers, with free search and paid systematic-review tools.
Best for: Searching and extracting data from academic papers, including systematic reviews
From $49/user/mo (currency not named), billed annuallyChecked 21 Oct 2026Research
Consensus
Academic search engine with a free plan, cited AI analysis and Deep reviews.
Best for: Finding what peer-reviewed research says about a question, with cited AI analysis
From $12/mo (currency not named), billed annuallyChecked 21 Oct 2026Research
Scite
Research assistant built on Smart Citations, with a 7-day trial and an API on Pro.
Best for: Checking how papers cite each other, with an API on the Pro plan
From $12/mo (currency not named), billed annuallyChecked 21 Oct 2026
Continue researching this task
More decision guides that cover the same tools or workflow. These are researched overviews unless a page says it includes hands-on testing.
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