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ReviewRamble

The best AI tools for chatting with your documents in 2026

Ask questions of your own PDFs, policies and notes and get answers that cite the page they came from. The list runs from ready-made apps to the open-source frameworks developers use to build the same thing over thousands of files.

By Andrew Miller and Sheela · Updated Oct 26, 2026 · How we review

How we chose: each pick is a product, model or project we have reviewed that does this job according to our review of it, ranked by our rating out of 5. We take no affiliate commission.

Also ranked: the best open-source RAG tools, the best open-source AI chat apps

  1. 1

    AI Tools: Search & research

    Gemini Notebook (formerly NotebookLM)

    For working from your own documents, Gemini Notebook is the strongest free tool going, and its opaque new compute limits are the price of that generosity.

    Best for: Students, researchers and analysts who need to understand and cite a defined set of their own documents.

    Price: Free; higher limits through Google AI Plus ($4.99/month, 2x), AI Pro ($19.99/month, 4x) and AI Ultra (about $100 or $200/month, 5x or 20x Pro). Included in qualifying Workspace editions; Enterprise version through Google Cloud.

    Read our Gemini Notebook (formerly NotebookLM) review
    4.6/5
  2. 2

    GitHub Repos: Chat apps & UIs

    Open WebUI

    A self-hosted chat portal with admin controls most paid products lack, from a project that published 159 security advisories in 2026 alone.

    Best for: Teams that want a private, multi-user chat portal over local and cloud models.

    Price: Free to self-host at any scale with the branding intact. White-labelling above 50 users, and the Terminals add-on, need an enterprise licence priced per seat; prices are not published.

    Read our Open WebUI review
    4.6/5
  3. 3

    GitHub Repos: Chat apps & UIs

    Dify

    Dify gives business teams a complete LLM app builder they can edit themselves, on a licence that only bites when you resell it as a hosted service.

    Best for: Teams building internal chatbots and RAG apps that non-engineers will maintain.

    Price: Self-hosted Community Edition free (modified Apache 2.0, one workspace). Dify Cloud: Sandbox free (200 one-time message credits), Professional $590/workspace/year, Team $1,590/workspace/year (annual billing, which Dify says saves 17%), Enterprise by quote.

    Read our Dify review
    4.5/5
  4. 4

    AI Tools: Productivity

    Notion AI

    Worth the Business plan for teams whose knowledge already lives in Notion, though the new per-seat credit allowances turn a flat price into something closer to a meter.

    Best for: Teams that already keep their docs, wikis and projects in Notion.

    Price: AI trial on Free and Plus ($10/member/month yearly, $12 monthly); full AI on Business $20/member/month yearly ($24 monthly) and Enterprise (custom), each seat with 1,500 Standard and 500 Select credits a month; extra Notion credits $10 per 1,000 monthly or $13 per 1,000 annually.

    Read our Notion AI review
    4.4/5
  5. 5

    GitHub Repos: Chat apps & UIs

    AnythingLLM

    AnythingLLM is the shortest path from a folder of PDFs to a private chatbot, but 25 security advisories argue for keeping its server edition behind a login and a VPN.

    Best for: Individuals and small teams who want private chat over their own documents.

    Price: Desktop and Docker free (MIT); an optional Desktop Pro subscription lifts daily limits on its Magic features (price not published in the docs). Hosted Cloud Basic $50/month, Pro $99/month; Enterprise custom.

    Read our AnythingLLM review
    4.3/5
  6. 6

    GitHub Repos: RAG & data

    LlamaIndex

    Still a deep toolkit for document-heavy RAG, but its maker now says plainly that the framework is no longer its priority.

    Best for: Python developers building RAG or document agents over large, varied data sources.

    Price: Framework free under MIT. LlamaParse (paid cloud): Free with 10k credits, Starter $50/month (40k credits), Pro $500/month (400k credits), Enterprise custom; 1,000 credits = $1.25.

    Read our LlamaIndex review
    4.3/5
  7. 7

    GitHub Repos: RAG & data

    Haystack

    A framework for people who want to read their RAG system rather than trust it, at the price of writing more of the wiring themselves.

    Best for: Engineering teams building maintainable production RAG and agent pipelines in Python.

    Price: Free and open source under the Apache 2.0 licence. deepset Studio is free for one user; the Haystack Enterprise Platform is custom-priced.

    Read our Haystack review
    4.2/5
  8. 8

    GitHub Repos: RAG & data

    RAGFlow

    A finished document-to-answer product you can run on one server, whose security record says it belongs behind a VPN rather than on the open internet.

    Best for: Teams that want a self-hosted document Q&A and knowledge assistant without building a pipeline.

    Price: Free and open source under the Apache 2.0 licence. InfiniFlow also sells RAGFlow Cloud: Free (500 credits a month, no API key), Starter $29/month and Pro $129/month (each shown against a higher $59 and $259), and Enterprise on request with BYOC and on-premises deployment.

    Read our RAGFlow review
    4.0/5

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