AI Compare AI Compare

Check prices, features and limits.
Pricing market
Automatic
Language
EN

Research & knowledge work

9 AI tools for Research & knowledge work, part of the Productivity category, with prices, limits and sources.

View all tools in Productivity

More topics in Productivity

Assistants & workspaces 65Email assistants 2Meetings, notes & planning 14Science & research 10Education & learning 10Sales & CRM 15Customer service & chat 18Automation & AI agents 20Data analysis & BI 9Legal & contracts 4Project management & forms 22Data pipelines & reporting 5Website & presentation builders 4Marketing automation & CRM 2

Sort

Sort

ChatPDF

Research & knowledge work

AI chat for documents, files, videos, and websites with summaries, citations, and study tools.

Free accessFree plan
Paid fromPlus · contact salesUnlimited document analysis
  • Analyse 2 documents free each day
  • PDF, Word, PowerPoint, Markdown, and text

Details Visit site (opens in a new tab)

Felo

Research & knowledge work

Multilingual AI search, chat and agent platform combining web research, document work and content creation in one tool.

Free accessFree plan
Paid fromMonthly · $14.9915,000 credits/month + 200/day bonus
  • Multilingual AI search combining web research, document analysis, and agents
  • Free Standard account with 200 credits per day

Details Visit site (opens in a new tab)

Google NotebookLM

Research & knowledge work

Query your own sources and generate audio, video, study, and research outputs.

Free accessFree plan100 notebooks × 50 sources, 50 chats, and 3 audio/video overviews daily.
Paid fromNotebookLM in Google AI Plus · $4.99200 notebooks × 100 sources
  • Upload your own sources (PDFs, web pages, text, YouTube) for context-bound questions
  • Audio Overviews: a 2-voice podcast summary of your notebook

Details Visit site (opens in a new tab)

Humata

Research & knowledge work

Analyse, summarise, and query PDFs and documents with page-based billing.

Free accessFree plan60 pages/month for 1 user; no overage.
Paid fromExpert · $9.99500 pages/month
  • PDF and document chat with GPT-5 support per pricing matrix
  • Free plan with 60 pages per month, no credit card required

Details Visit site (opens in a new tab)

Logically (formerly Afforai)

Research & knowledge work

Combine research, reference management, PDF annotation, and academic writing with citation-backed AI.

Free accessFree plan5 each of autosuggestions, chats, and commands/day; 100 MB; 200 pages/file.
Paid fromUnlimited annual · 12 $ pro Nutzer und MonatAI autosuggestions, commands, and chat unlimited under fair use
  • AI-powered research and writing in one platform (formerly Afforai)
  • Unlimited AI autosuggestions, commands, and chat under fair use on Unlimited

Details Visit site (opens in a new tab)

PDF.ai

Research & knowledge work

Chat interface for PDFs with an API to parse, extract, and split documents inside your own workflows.

Free accessFree plan
Paid fromPro · $17 pro Monat, bei jährlicher Abrechnung $10 pro Monat100 PDF uploads
  • Chat interface for questions across one or many PDFs
  • Application programming interface (API) to parse, extract, and split documents

Details Visit site (opens in a new tab)

Perplexity

Research & knowledge work

Answer web searches with sources, investigate further, and produce research reports.

Free accessFree planLimited Pro Searches; 3 file uploads per day. No advanced models or image generation.
Paid fromPro · $20Advanced models and Pro Search
  • AI search with cited current sources
  • Pro Search and Deep Research for multi-step research

Details Visit site (opens in a new tab)

Readwise Reader

Research & knowledge work

Read, organise, and use AI across articles, PDFs, EPUBs, newsletters, RSS, video, and highlights.

Free accessFree trial30 days without card, extendable through referrals.
Paid fromAnnual · $119.88All Reader capabilities
  • All reading formats in one app: articles, PDFs, EPUBs, newsletters, RSS feeds, and video
  • Import your entire highlight library from other tools and manage it centrally

Details Visit site (opens in a new tab)

You.com

Research & knowledge work

Search and research APIs that deliver web results, page contents, and citation-grounded answers for AI applications.

Free accessFree plan100 queries per day without an API key; not published as a $0 plan price.
Paid fromWeb Search API · $5.001-100 results per call
  • Web and news search with LLM-ready snippets and metadata
  • Contents API returns Markdown or HTML for URL batches

Details Visit site (opens in a new tab)

Alphabetical order. This is not a quality ranking.

Comparison criteria

We compare free access, paid entry, plan limits, features and the listed official sources. Unsourced figures stay marked as not published.

Methodology

Only confirmed entries appear in the catalog. Prices, plans and limits come from listed official vendor pages. Missing figures stay marked as not published. Result lists are alphabetical by default and can be switched to Free access first; neither is a quality ranking. The vendor page always wins.

Is this a ranking?

No. Result lists are alphabetical by default and can be switched to Free access first. We do not award stars or a test winner.

Do you estimate missing prices?

No. Missing figures stay marked as not published. The current vendor page always wins.

How do you sort the tools?

Result lists are alphabetical by default and can be switched to Free access first. This is not a quality ranking.