AI Compare Ninja AI Compare Ninja

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

AI Tools for Research & knowledge work Compared

12 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 100Email assistants 2Meetings, notes & planning 15Science & research 12Education & learning 12Sales & CRM 21Customer service & chat 25Automation & AI agents 28Data analysis & BI 18Legal & contracts 4Project management & forms 23Data pipelines & reporting 5Website & presentation builders 4Marketing automation & CRM 3

Sort

Sort

Atypica

Research & knowledge work

AI research agent for market questions, simulated audiences and testing business hypotheses.

Free accessFree trial
Paid fromPro · month · 20 USDTurn business questions into structured research plans
  • Turn business questions into structured research plans
  • Explore AI personas through interviews and group simulations

Details Visit site (opens in a new tab)

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: 200 credits per day with selected models and tools

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 per month for 1 user, with no overage allowed.
Paid fromExpert · $999500 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 $ per user per monthAI 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)

OmniBox

Research & knowledge work

AI knowledge workspace for collected web pages, documents and recordings.

Free accessFree plan
Paid fromAdvanced · 31-day pass · 39 CNY31-day card;3000 pages,300 media minutes,1000 Agent-2.1 points monthly
  • Collect web content and files in personal or shared knowledge spaces
  • Make documents and recordings searchable with OCR and transcription

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 per month, billed annually $10 per month100 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)

ThinkAny

Research & knowledge work

AI search combining web research with conversational follow-up questions.

Free accessFree plan
Paid fromPro · month · 20 USDFind information through search and semantic context
  • Find information through search and semantic context
  • Develop research questions with an AI assistant

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. This is not listed as an official $0 plan.
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)

Two tools at a glance: prices, limits and sources from the catalog. Side by side, not a ranking.

ChatGPT vs PerplexityGrok (xAI) vs PerplexityPerplexity vs Google NotebookLMPerplexity vs You.comGoogle NotebookLM vs Elicit

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. Search results are ordered by Task match by default; category and task lists are alphabetical. Both can be switched to Free access first; neither is a quality ranking. The vendor page always wins.

Is this a ranking?

No. Search results are ordered by Task match by default; category and task lists are alphabetical. Both can be switched to Free access first. We do not award stars or a test winner.

What does "free access" mean for the listed tools?

Free access can mean a permanently free plan, a time-limited trial, or a one-off starting credit with no card required. The exact type is stated on each tool's own page.

How many of the listed tools offer free access?

12 of 12 listed tools offer free access - a permanent plan, a trial, or a no-card credit.

How do I see tools with free access first?

Use the “Free access first” toggle above the list to see tools with free access first.