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Knowtarium vs NotebookLM

NotebookLM, now called Gemini Notebook, is Google's AI research tool: it reads the sources you add and answers questions about them. Knowtarium keeps a lasting knowledge base that your agents write and you review, where every document records who wrote it, who checked it and when it goes stale.

Pre-order See how it works

The short version

Which one is for you?

They solve different problems. Here's which one fits the way you work.

Choose NotebookLM if

You want to study a set of sources now: ask questions with citations, turn them into an Audio Overview, a report, a mind map or flashcards, and share the notebook, on the web or your phone.

Choose Knowtarium if

You want a knowledge base that grows over time as plain files, written by Claude Code, Codex or Cursor and checked by you, where every document says who wrote it, who checked it and when it goes stale. Our guide to the LLM wiki explains the idea.

Side by side

Feature by feature.

TopicKnowtariumNotebookLM

Made forKeeping a knowledge base that agents write and you trustResearching and learning from sources you add, with Gemini answering from them

Where your knowledge livesOn your computer, as OKF files: plain markdown that any editor or agent can readIn notebooks in your Google account; notes export to Google Docs or Google Sheets

What goes inDocuments that your agents and you write, citing their sourcesSources you add: PDFs, Google Docs, Slides and Sheets, web pages, YouTube videos, audio and more; up to 50 per notebook on the free plan

AI built inNone: Knowtarium doesn't call an AI. Your own agents do the writingGemini: chat with in-line citations, Audio and Video Overviews, reports, mind maps, flashcards and quizzes

Across projectsOne knowledge base, with every document linked into a graphEach notebook is a collection of sources for one project and can't draw on other notebooks at the same time

Who wrote it, who checked itRead from generated and verified, and shown as a trust tier on every documentNot built in

Keeping it currentDocuments past stale_after are flagged and queued for a refreshSources from Google Drive sync every few minutes

SharingNone: a personal appShare a notebook with viewers or editors (up to 50 people from a personal account), or publicly by link

PlatformsmacOS, Windows and LinuxWeb, iOS and Android, and notebooks inside the Gemini app

Your dataStays on your computerNot used to train Gemini Notebook unless you give feedback

Price$20 once, $10 during pre-orders; no subscription, no accountFree with a Google account; higher limits with Google AI Plus, Pro or Ultra, or a qualifying Workspace plan

Facts about NotebookLM checked on September 26, 2026 against notebook.google, the Gemini Notebook help center and Google's announcement of the new name. NotebookLM, Gemini Notebook and Gemini are trademarks of Google LLC. OKF is published by Google Cloud. Knowtarium isn't affiliated with Google. Spot something out of date? Emailcontact@magentix.studio.