Updated November 6, 2026

NotebookLM alternatives in 2026

NotebookLM does one thing few tools do: it answers only from the sources you give it, cites them, and turns the same sources into audio, video, mind maps, slides and flashcards, free. The alternatives each take a piece of that. ChatGPT Projects, Claude Projects and Perplexity Projects give you grounded chat over your files plus the open web. Microsoft 365 Copilot Notebooks is the closest copy, for Microsoft workplaces. Notion and Obsidian are places to keep notes first and ask questions second. If what you miss is folders, bulk import, export or automation rather than the model, a Chrome extension on top of Gemini Notebook is usually the smaller change.

Gemini Notebook is NotebookLM's new name. We make KastorFlow, a Chrome extension for it, so we have a stake here; every fact about another tool comes from that tool's own site, dated.

Side by side

Tool	Grounded in your files	Files per workspace	Audio or video from sources	Web search	Price a month (US)
Gemini Notebook (NotebookLM)	Yes, with inline citations; answers only from sources	50 free, 100 Plus, 300 Pro, 500 or 600 Ultra	Audio and Video Overviews, mind maps, slides, flashcards	Discover sources and Deep Research, to add sources	Free; $4.99, $19.99, $99.99+
ChatGPT Projects	Yes, alongside its general knowledge	5 free, 25 Go and Plus, 40 Pro	—	Yes	Free; Go $8, Plus $20, Pro $200
Claude Projects	Yes; paid plans expand knowledge up to 10× with retrieval	Up to 5 projects free; size not published	—	Yes	Free; Pro $20 ($17 yearly), Max from $100
Perplexity Projects	Yes, with web results in the same answer	10,000 files, 5 GB, every plan	—	Yes, its core	Free; Pro $20
Microsoft 365 Copilot Notebooks	Yes, files, pages and chats	Not published	Audio overview (work or school accounts)	Yes	Needs a Microsoft 365 Copilot licence
Notion	Yes, across your workspace	Your workspace	—	Yes	AI on Business, $20 per member
Obsidian	Through community plugins and your own model key	Your vault	—	Through plugins	Free; Sync $4

Each row is from the tool's own pricing or help pages, read October 22, 2026: Google's plans help page and announcements, OpenAI's Projects and ChatGPT Go pages, Anthropic's pricing and Projects pages, Perplexity's Projects article, Microsoft's Copilot Notebooks audio overview article, notion.com/pricing and obsidian.md/pricing. "—" means the site doesn't offer it. Spotted a change? Tell us.

ChatGPT Projects

What it is: a folder of chats with files and instructions attached. Answers draw on the files and on everything else ChatGPT knows, with web search when it wants it.
Limits: 5 files per project on Free, 25 on Go and Plus, 40 on Pro, Business and Enterprise (OpenAI's Projects article). Gemini Notebook's free plan takes 50 sources per notebook.
Choose it when you want one assistant for writing, code and research, and your source set is small.
You give up answers that stay inside your sources, the inline citation on every sentence, and the Studio outputs. NotebookLM vs ChatGPT in detail

Claude Projects

What it is: a workspace with its own knowledge base and instructions; every chat in it reads that knowledge. Free accounts get up to 5 projects; on paid plans, when the knowledge outgrows the context window Claude switches to retrieval, which Anthropic says expands capacity by up to 10×.
Price: Pro is $20 a month or $17 billed yearly; Max from $100 (claude.com/pricing).
Choose it when your work is long documents and writing, where Claude's handling of a whole book-length file in one context is the point.
You give up the audio, video and mind maps, and the per-sentence citations.

Perplexity Projects (formerly Spaces)

What it is: a shared workspace of searches, files and instructions. Each Project holds up to 10,000 files and 5 GB, the same on every plan, with instructions up to 8,000 characters.
Choose it when you need your files and the live web in the same answer. Gemini Notebook treats the web as a place to find sources, not as a source itself.
You give up the Studio outputs and the strict "only from my sources" grounding.

Microsoft 365 Copilot Notebooks

What it is: the closest copy of the notebook idea: add Word files, OneNote pages, chats and loops, ask across them, and generate an audio overview.
Limits: needs a Microsoft 365 Copilot licence, and Microsoft's article (updated June 2026) says the audio overview is only for work or school accounts; Personal and Family subscribers get notebooks without it.
Choose it when your documents already live in SharePoint and OneDrive and your organisation pays for Copilot.

Notion

What it is: a wiki and database tool with Notion AI across the workspace. Notion AI is included on the Business plan, $20 per member a month, and Free and Plus get a trial (notion.com/pricing).
Choose it when the notes are the product and a team edits them; AI questions over the workspace are a bonus.
You give up grounding in arbitrary outside sources (PDFs, videos, web pages you don't own) and the Studio outputs.

Obsidian

What it is: local Markdown notes you own, free for personal use (Sync is $4 a month billed yearly). AI comes from community plugins with your own model key.
Choose it when you want the notes to outlive any service. Many people pair it with Gemini Notebook rather than replace one with the other. NotebookLM and Obsidian

Open-source and local NotebookLM alternatives

Project	Licence	Runs	AI models	Podcasts
Open Notebook	MIT	Self-hosted, with Docker	20+ providers, including Ollama and any OpenAI-compatible local server; your own keys	Yes, 1 to 4 speakers
SurfSense	Apache-2.0	Desktop app for Windows, macOS and Linux, no account	Any OpenAI-compatible API, or a local one	Yes, voiced on your computer
Kotaemon	Apache-2.0	Self-hosted, with Docker	OpenAI, Azure OpenAI, Cohere and others, or local models through Ollama	Not listed

Choose one of these when your documents can't leave your own computer, or when you want to pick the model. You trade Google's polish and free compute for setting it up and paying for, or running, the model yourself.

From each project's GitHub page, read October 25, 2026. Open Notebook calls itself a "100% local" alternative to NotebookLM; Kotaemon describes itself as a tool for chatting with your documents.

Study apps people compare with NotebookLM

Turbo AI (formerly Turbolearn) turns study materials into notes, flashcards and quizzes. It has a free tier.
StudyFetch turns slides, lectures and class notes into study tools. Free to start.
Anara calls itself "an AI workspace for science". It has a free plan and a paid Plus plan.
Google Illuminate, a Google experiment, turns research papers into audio summaries.

For studying, the method matters more than the app: quizzes and spaced review beat summaries in all of them. How to study with NotebookLM

From each app's own site, read October 25, 2026. Turbo AI and StudyFetch don't publish prices on their sites.

Or keep NotebookLM and add what's missing

Most reasons people look for an alternative aren't about the model. They're folders, importing fifty links at once, saving a ChatGPT chat, exporting everything, or keeping sources current. Those are what Chrome extensions add on top of Gemini Notebook while the notebooks stay in your Google account. KastorFlow, which we make, covers them: folders and collections, bulk import, saving AI chats, downloading every artifact, automations and a source audit. Every NotebookLM extension compared

Try KastorFlow free before you move your notebooks anywhere.

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Questions

What is the best alternative to NotebookLM?

It depends on what you miss. For answers grounded in your own files with web search too, Perplexity Projects or ChatGPT Projects; for a Microsoft workplace, Copilot Notebooks; for notes you own as plain files, Obsidian; for a team wiki with AI on top, Notion. None of them generates Audio Overviews, mind maps, slide decks and flashcards from the same sources the way Gemini Notebook (NotebookLM's new name) does, and none is free with 50 sources per notebook.

Is there a free alternative to NotebookLM?

Partly. ChatGPT's and Claude's free plans include a handful of projects with a few files each, Perplexity's free plan includes Projects, and Obsidian is free for personal use but has no built-in AI. Gemini Notebook itself is free with 100 notebooks of 50 sources, which is more than the free tiers of the alternatives.

Is there an open-source NotebookLM alternative?

Yes. Open Notebook (MIT licence) is self-hosted and works with 20+ AI providers, including local models through Ollama, and makes podcasts. SurfSense (Apache-2.0) is a desktop app that runs on your computer with no account. Open-source alternatives

Which alternative is closest to NotebookLM?

Microsoft 365 Copilot Notebooks is the closest copy: a notebook of files and pages, chat grounded in them, and an audio overview, but it needs a Microsoft 365 Copilot licence and work or school account for the audio. Perplexity Projects and ChatGPT Projects are close for grounded chat but make no audio, video or mind maps.

Can I move my NotebookLM notebooks to another tool?

Not in one step. Gemini Notebook exports notes and reports to Google Docs, downloads Audio Overviews, mind maps, slide decks and flashcards, but has no whole-notebook export. Your sources are files and links you already have. KastorFlow downloads every Studio artifact across notebooks at once. How to export

Can I keep NotebookLM and fix what's missing instead?

Often, yes. Gemini Notebook now groups notebooks into collections and labels sources inside a notebook. The other usual complaints, no bulk import, no export of everything, no search across notebooks, no automation, are what Chrome extensions such as KastorFlow add on top, while the notebooks stay in your Google account.