Checked before you read it
Brain reviews each statement against the passages it cites and corrects what they do not support. Anything it still cannot confirm is clearly marked, so you know what to check.
Annota Brain
Ask your documents.
Verified answers, with sources. Add your files to a knowledge base and ask in your own words: Brain checks every statement drawn from your documents before you see it.
Verified answers, with citations from your documents.
Knowledge
From your files to verified answers.
Three steps from your files to answers you can check. For more control, review the same documents in Annota Studio.
Create a knowledge base
Give it a name and drop in your files: PDFs, scans, Word, Excel, and more. Brain keeps them in a document dataset that you can also open in Studio.
Let Brain index them
Brain starts reading your documents as soon as you upload them. Follow the progress, or close the page and come back later.
Ask and check
Select up to 10 knowledge bases and ask. Every answer cites its sources: open a reference to see the exact passage on the original page.
Verification
Every statement, traced to a source.
Sources down to the passage
Numbered citations open the original page and show the passages used. Read the full document, its summary, or search the complete text.
Always up to date
Add, correct, or remove a document and the knowledge base keeps up on its own, with nothing to upload again.
Private to your organization
Knowledge bases are visible only to members of your organization.
Chat
A chat built around your knowledge bases.
Brain's chat is where you work with your knowledge bases, and it also handles the everyday questions in between.
Ask, follow up, go deeper
Keep the conversation going across one or more knowledge bases.
Clear about where answers come from
Each answer shows whether it was verified against your documents, comes partly from them, or is a general answer.
Your procedures, every time
Teach Brain how your organization works: procedures, checklists, and formats. It applies them on its own, or you pick them when you ask.
Answers in your language
Ask in any language and Brain replies in the same one, whatever language your documents are in.
Work from your AI agent
Bring Brain to your agent.
Through MCP, your AI agent can search your knowledge bases, read your documents, and ask Brain for verified answers, without leaving your conversation.
AI agent - Annota AI MCP / Example
Frequently asked questions
Can I use Brain without a knowledge base?
Yes. Without a knowledge base, Brain answers from the model's general knowledge, and the answer is labelled as a general answer, not from your documents. Select a knowledge base when the answer must come from your documents: statements drawn from them are cited and checked against the source pages, and anything else is labelled as general knowledge.
Which documents can I add?
PDFs and scans (PNG and JPEG), Office and text files (Word, Excel, PowerPoint, OpenDocument, RTF, HTML, EPUB, CSV, Markdown, and plain text), and MP3, M4A, and WAV recordings, which are transcribed into text. Each file can be up to 100 MB; PDFs up to 1,000 pages and text files up to about 250 pages. A knowledge base can hold up to 1,000 documents and 10,000 pages. Brain works with the extracted text: it does not interpret images or charts inside the pages.
Can I review the documents behind a knowledge base?
Yes. Each knowledge base follows one document dataset, which appears in Studio with an In Brain badge. There you can correct the OCR or add and approve documents, and the knowledge base follows these changes automatically; it uses the live dataset, not its saved versions. Knowledge bases created in Brain index all their documents. When you turn an existing Studio dataset into a knowledge base with Use in Brain, only approved documents are indexed by default; you can choose to include all documents with extracted text.
How does Brain use credits?
Adding documents: text extraction costs 0.4 credits per page of a PDF or scan or 2 credits per started minute of audio, while Office and text files are free to add. Indexing costs 0.5 credits per page; for Office and text files, a page is about one printed A4 page. If indexing fails, it is free. Unchanged documents are not charged again. Asking: each member has a weekly chat allowance, renewed every Monday at 00:00 UTC, used before the organization's credits. Each answer shows its cost, which depends on how much text the AI reads and writes. Answers that fail or do not find the information are free; answers you stop are charged. Searches, in the app or from your AI agent, are charged the same way; opening documents and citations is free. The Pricing page lists each plan's allowance.
Can Brain still be wrong?
Verification greatly reduces unsupported statements, but it is automated: it can miss errors and cannot find information that was not retrieved. Parts that could not be confirmed are marked. Treat answers as a starting point, open the cited passages, and check important points before relying on them.
Is Brain available on every plan?
Yes, on every plan, including Enterprise. Chat answers use each member's weekly allowance first, then the organization's credits, shared with Studio. On Team, every member can use the organization's knowledge bases.
What happens to my data?
Brain stores the extracted text, summaries, and search index of each knowledge base, and your conversations. Conversations are visible only to you, not even to admins: delete them at any time; they are also deleted when you leave or are removed from the organization, delete your account, or the organization is deleted. Deleting a knowledge base removes its index and summaries, while its dataset and documents remain in Studio; saved answers keep the cited excerpts until you delete the conversation. The Privacy & Security page explains hosting and providers.
Create your first knowledge base.
Create a free account, open Knowledge in the sidebar, add your documents, and ask your first question.