# Which AI tool can answer questions across hundreds of company documents? > For a set of files, Gemini Notebook gives cited answers. For hundreds of documents across Drive and Slack, use Dust or Onyx. Free lesson. Source: https://learn.ynteractive.com/content/questions/ai-search-across-company-documents · Updated 2026-10-21 · Free from Stepthrough (https://learn.ynteractive.com) By [Robert Breen](https://learn.ynteractive.com/content/about) · Published October 21, 2026 · Updated October 21, 2026 · 4 min read For a defined set of files, such as one client's contracts or a policy binder, use [Gemini](https://learn.ynteractive.com/content/glossary/gemini) Notebook (formerly [NotebookLM](https://learn.ynteractive.com/content/glossary/notebooklm)): it answers only from the sources you add and puts a citation on every fact. When the documents number in the hundreds and live across Google Drive, Slack, [Notion](https://learn.ynteractive.com/content/glossary/notion) and other apps, pick a tool that connects to those apps and keeps them in sync, such as Dust or Onyx. You can try the first route in [Gemini Notebook: cited answers and a briefing from your docs](https://learn.ynteractive.com/content/notebooklm-gemini-notebook-cited-answers-briefing-doc). The reason scale changes the answer is simple. A chat project in ChatGPT or Claude holds a limited number of uploaded files (ChatGPT Projects allow 5 files on Free and up to 40 on Pro and business plans), and you have to re-upload when a file changes. Tools built for company knowledge search the documents where they already live and only bring back the passages that match each question. That method is called retrieval. ## What are my options, and what decides between them? - **Gemini Notebook.** Add PDFs, Google Docs, Slides, websites and more to a notebook, then ask questions and click each citation to see the passage. Files from Drive stay in sync. Deciding factor: a focused set of documents for one project or team. - **ChatGPT or Claude projects.** Upload files once and reuse them in every chat. Deciding factor: a handful of reference files, such as a price list and a style guide, not a whole archive. - **Dust.** A platform for building AI agents on company data, with connectors to Slack, Notion, Google Drive, Salesforce and more. Admins choose what syncs, and people see only what they can already open in the source app. Deciding factor: many teams, many apps, and agents people call from Slack. - **Onyx.** An open-source AI search and chat tool that connects to 40 or more work apps and keeps syncing in the background. You can self-host it or use its cloud. Its docs say permission sync is a paid feature. Deciding factor: you want search across everything and control over hosting. - **Build your own with n8n and Pinecone.** A workflow loads your documents into a vector database, and a chat agent searches it before every answer. Deciding factor: you need a custom bot, such as an internal helpdesk, and someone comfortable with workflows. The [Projects vs Gems vs NotebookLM comparison](https://learn.ynteractive.com/content/compare/chatgpt-projects-vs-gemini-gems-vs-notebooklm) goes deeper on the first two. ## How do I choose for my company? 1. **Count the documents and where they live.** Twenty files in one folder is a notebook. Thousands across five apps is a connector tool. 2. **Check permissions.** Staff must not get answers from files they cannot open, such as HR or salary records. 3. **Test with ten real questions,** including two the documents do not answer. 4. **Check citations** on every test answer. 5. **Assign an owner** who keeps the documents current. Old files give old answers. ## What does this look like in a real lesson? In [the Gemini Notebook lesson](https://learn.ynteractive.com/content/notebooklm-gemini-notebook-cited-answers-briefing-doc) you help the owner of a cleaning company prepare for a new dental office client. You create a notebook, upload the client's cleaning agreement as a PDF, add the crew handbook from Google Drive and the services web page as a link. You ask what the contract requires, click the first citation and see the passage highlighted in the contract, save the answer to a note, then generate a Briefing Doc for the crew lead. For the build-your-own route, [Answer Staff Questions from Your Own Docs](https://learn.ynteractive.com/content/n8n-ai-agent-pinecone-rag-chatbot) has a chat agent search a handbook in Pinecone, answer from page 6 and page 9 with citations, and say "I don't know" about bonuses because the handbook does not cover them. The short explainer [How AI Answers from Your Documents](https://learn.ynteractive.com/content/how-ai-answers-from-your-documents) shows the chunks, the search and the fallback in plain diagrams. ## What mistakes should I avoid? - **Uploading everything to one chat.** You hit file limits, and answers get vaguer. - **Ignoring permissions.** A search tool that ignores access rights can leak HR or client files. - **Never testing a question the files cannot answer.** A good setup says "I don't know". - **Letting documents go stale.** Retrieval only finds what is there. ## Key takeaways - A notebook fits a focused set of files with cited answers. - Hundreds of documents across apps need a connector tool like Dust or Onyx. - Check permissions before anyone else uses it. - Test with questions the documents cannot answer. ## Frequently asked questions **Is this the same as training an AI on my documents?** No. These tools search your documents at question time and answer from what they find. Nothing is retrained. The [retrieval FAQ](https://learn.ynteractive.com/content/blog/ai-retrieval-rag-faq) explains the difference. **Can ChatGPT search my company's Google Drive?** ChatGPT and Claude can connect to some work apps when your plan and admin allow it. Check what your company has turned on. More in [can AI answer questions about your data](https://learn.ynteractive.com/content/blog/can-ai-answer-questions-about-your-data). **How do I stop wrong answers?** Tell the tool to answer only from the sources, show citations, and say when it does not know. Then fix the document, not the bot. ## Learn it hands-on Free, interactive lessons: you do every step yourself in a practice copy of the real tool, it checks your work as you go, and nothing touches your real accounts. - [NotebookLM (Now Gemini Notebook): Cited Answers and a Briefing from Your Docs](https://learn.ynteractive.com/content/notebooklm-gemini-notebook-cited-answers-briefing-doc): Create a notebook, add a PDF, a Google Doc from Drive and a web page as sources, ask a question and check its citations, save the answer to a note… (about 7 minutes) - [How AI Answers from Your Documents: Retrieval (RAG) Explained](https://learn.ynteractive.com/content/how-ai-answers-from-your-documents): Follow one customer question through a support bot: files cut into chunks, a search by meaning, the AI told to answer only from what it found, and a… (about 7 minutes) - [Answer Staff Questions from Your Own Docs using n8n + Pinecone](https://learn.ynteractive.com/content/n8n-ai-agent-pinecone-rag-chatbot): Build an n8n chat agent that searches your handbook in Pinecone before every answer, cites the page it came from, and says "I don't know" instead of… (about 13 minutes) - [Make Your Handbook Searchable for an AI Helpdesk using Pinecone + n8n](https://learn.ynteractive.com/content/pinecone-n8n-load-docs-vector-database): Create a free Pinecone index, then build an n8n workflow that reads your handbook from Google Drive, cuts it into chunks, turns them into embeddings… (about 14 minutes) [Start the free lesson](https://learn.ynteractive.com/modules/gemini-notebook) ## AI tools in this answer Each one in the Stepthrough AI tools directory: what it does, who it is for and the free lesson where there is one. [Gemini Notebook](https://learn.ynteractive.com/content/ai-tools/tool/notebooklm) · [Dust](https://learn.ynteractive.com/content/ai-tools/ai-agents#tool-dust) · [Onyx](https://learn.ynteractive.com/content/ai-tools/research-search#tool-onyx) · [ChatGPT](https://learn.ynteractive.com/content/ai-tools/tool/chatgpt) · [Claude](https://learn.ynteractive.com/content/ai-tools/tool/claude) [The full AI tools directory](https://learn.ynteractive.com/content/ai-tools) ## Related terms Plain-English definitions, each with an example from a free lesson. [Gemini](https://learn.ynteractive.com/content/glossary/gemini) · [NotebookLM](https://learn.ynteractive.com/content/glossary/notebooklm) · [Notion](https://learn.ynteractive.com/content/glossary/notion) · [Agentic RAG](https://learn.ynteractive.com/content/glossary/agentic-rag) · [Binary data (files in n8n)](https://learn.ynteractive.com/content/glossary/binary-data) · [Chunk overlap](https://learn.ynteractive.com/content/glossary/chunk-overlap) [The full AI glossary](https://learn.ynteractive.com/content/glossary) ## Related questions - [Can I do real work with only free AI tools?](https://learn.ynteractive.com/content/questions/can-free-ai-tools-do-real-work): Yes for everyday writing, summaries and small spreadsheet jobs. Free tiers hit limits on volume, agents and client data. See… - [How do I make ChatGPT show where each fact came from?](https://learn.ynteractive.com/content/questions/how-to-make-chatgpt-show-its-sources): Ask ChatGPT to search the web and cite a source after every fact, mark anything unsourced, then open the citations yourself… - [Can I trust AI answers enough to use them at work?](https://learn.ynteractive.com/content/questions/can-i-trust-ai-answers-at-work): Trust AI for drafts you can check; verify every fact, number and promise before it reaches anyone. Sourced tools speed up… - [How are compliance teams using AI?](https://learn.ynteractive.com/content/questions/how-compliance-teams-use-ai): Compliance teams use AI to compare rule and policy versions, answer questions from their own documents with citations, and write… - [Can AI answer employees' handbook and benefits questions without giving wrong answers?](https://learn.ynteractive.com/content/questions/can-ai-answer-employee-handbook-questions): Yes, if it answers only from your handbook, cites the section and hands anything personal to HR. How to keep it accurate, with a… - [Which AI tool can pull tables out of a scanned PDF into Excel?](https://learn.ynteractive.com/content/questions/pull-tables-from-scanned-pdf-to-excel): For one scan, Adobe Acrobat or Smallpdf with OCR exports to Excel. For the same document every week, use Docparser or Docsumo… [More questions: Which AI tool for...](https://learn.ynteractive.com/content/questions/which-tool) · [All AI questions](https://learn.ynteractive.com/content/questions) · [All free tutorials](https://learn.ynteractive.com/content)