AI Use Cases

Chat & research · 7 tools · updated Oct 15, 2026

I want to ask questions about my own files

Claude leads with an evidence score of 96/100, ahead of NotebookLM (17) and Le Chat (11). 7 of 7 can be used free. Best for drafting and revising long documents: Claude.

Ranked by evidence — GitHub stars, Hacker News mentions, release activity and how much you can use for free. Recomputed nightly. How the score works.

1
Claude Free tier
Anthropic's chat assistant known for careful long-form writing, large context windows and Projects for working over document sets.

+ Produces natural, editable prose and follows nuanced instructions over very long documents better than most rivals.
− Pro usage limits can run out mid-session on long conversations, and it has no built-in image generation.

Pro $20/mo, Max from $100/mowebmacwindowsiosandroidapi
96▲ 7
evidence / 100
2
NotebookLM Free tier
A grounded research notebook that answers only from the sources you upload and can turn them into Audio Overview podcasts.

+ Answers are grounded strictly in your uploaded PDFs, Docs, URLs and YouTube videos with citations, and Audio Overviews turn them into a two-host podcast.
− Sources are capped per notebook and the free tier limits daily queries and audio generations.

Free; NotebookLM Plus via Google AI Pro $19.99/mowebiosandroid
17▲ 16
evidence / 100
3
Le Chat Free tier
Mistral's European chat assistant with fast Flash Answers, web search, document upload and image generation.

+ Very fast responses and EU-hosted data handling, with a cheaper Pro tier than the US incumbents.
− Smaller model ecosystem and fewer integrations, and answers lag the top US models on hard reasoning tasks.

Pro $14.99/mowebiosandroidapi
11▲ 2
evidence / 100
4
AskYourPDF Free tier
Chat with PDFs and other documents via web app, Chrome extension, ChatGPT plugin or API.

+ Available almost everywhere, including an API for developers who want document Q&A inside their own product.
− Answer quality is middling on long documents and the free tier is restrictive on uploads and questions.

webchrome-extensionapi
10▲ 1
evidence / 100
5
SciSpace Free tier
A research workspace that searches papers, explains PDFs line by line and drafts literature reviews.

+ The Copilot sidebar explains equations, tables and jargon in a paper you are reading without leaving the PDF.
− The free tier is limited and the interface pushes upgrades aggressively.

webchrome-extension
9—
evidence / 100
6
ChatPDF Free tier
Upload a PDF and ask questions about it in chat, with answers linked to page references.

+ Zero setup: drop a PDF and start asking, with page citations for every answer.
− Free plan caps file size and page count, and long or scanned PDFs often produce vague answers.

web
8▼ 1
evidence / 100
7
Humata Free tier
A document assistant that answers questions across many uploaded files and highlights the exact passages it used.

+ Answers point to highlighted passages inside the source document, and it handles folders of files rather than one PDF at a time.
− Free tier page limits are tight and performance slows with large document collections.

web
8▼ 1
evidence / 100

Missing a tool? It gets added when it shows up in the release feed with real traction, not by request.

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