If you are an AI agent, LLM, or automated tool, a clean Markdown version of this page is available at https://www.kortex-notebooklm.com/about.md

Made by people who use AI chats and Gemini Notebook every day.

ChatGPT, Claude, Gemini and Gemini Notebook (formerly NotebookLM) help you think. None of them is good at keeping what you thought. Kortex fixes that.

Kortex at a glance

What is Kortex?

Kortex is an AI toolkit for Chrome. It saves and searches your ChatGPT, Claude, Gemini, Perplexity and Grok chats on your computer, moves context between AIs, and adds memory and AI tools to Gemini Notebook (formerly NotebookLM), with MCP for AI assistants.

Is Kortex made by Google?

No. Kortex is an independent Chrome extension, not affiliated with or endorsed by Google. It works inside Gemini Notebook, the Google research tool that was called NotebookLM until July 16, 2026. It adds import, organization, export and MCP features that Google does not offer.

How many people use it?

100,000+ people. It is rated 4.5 out of 5 from 410 ratings on the Chrome Web Store, as of November 5, 2026.

Is Kortex free?

Yes. The free plan includes 10 imports and 10 exports a day, sending highlights from any page, search across every notebook and source, and 10 saved prompts. Pro removes the daily limits. It adds sync across devices, bulk import, automations, templates, the podcast feed and Kortex MCP. Pro costs $9.99 a month, $108 a year, or $199 once for Lifetime.

Who has written about it?

XDA Developers published a hands-on review, and Kortex was a top post of the day on Product Hunt at launch.

How do I reach the people who build it?

Write to kortexnotebooklm@gmail.com, or start from the support page. You talk to the people who build Kortex.

Why we built it

Kortex started with a frustration that anyone who uses Gemini Notebook will know. You spend an hour in a great research session and find three useful insights. Then you close the tab. The chat is gone. The sources sit behind a read-only pane. Your best prompt is something you will retype from memory tomorrow, a little worse.

Every notebook stood alone.

Nothing carried over, and nothing built on what came before. The tool meant to build your knowledge base started fresh every time you began something new.

So we built the missing half: a browser extension that adds export, organization and memory to Gemini Notebook. You never have to leave it.

Export sources to PDF, Markdown, text or ZIP
Save your best prompts and reuse them
Organize notebooks with nested folders and tags
Highlight and annotate sources
Update every Google Doc in a notebook with one click

The work you do stays yours, in formats you can take anywhere.

Today Kortex is used by researchers, students, writers and analysts in Chrome, Edge and Brave. We ship updates often. Most of them start as a message from someone who got stuck and told us.

What we believe

Three promises decide what we build and what we will not build.

Your data is yours.

We don't store your conversations or the contents of your sources. Chat transfers are processed in memory and go straight from your browser to your own Gemini Notebook account.
Read the privacy policy

Never kept by Kortex

Your chat conversations

The documents in your notebooks

Kept in your private account

What you make in Kortex: prompts, folders, tags and notes
No lock-in.

A knowledge tool you cannot export from is a trap. Everything you build in Kortex can be exported in open formats whenever you want, including your saved prompts and views.
- PDFReady to print
- MDMarkdown
- TXTPlain text
- ZIPEverything at once
We build in public.

Our roadmap is public, and requests from people who use Kortex shape it. If something blocks you, tell us. The fix often ships that week, not that quarter.
See the public roadmap

How we work

Kortex is a small independent project. Its roadmap is not set by venture investors who have never opened Gemini Notebook.

We use it every day for our own research. That is why it keeps getting better: when something is annoying, we feel it first. There is no support queue to get lost in. You talk to the people who build it.

Email us

Questions, bug reports, feature ideas. The form drafts the email in Gmail for you, or write to kortexnotebooklm@gmail.com from any mail app.

Read the docs

Guides to every feature, and how to connect Kortex MCP.

See the roadmap

What we are building next, and what just shipped.

Looking for a quick answer? The support page has most of them.

Add Kortex to Chrome. It takes a minute.

Install Kortex in under a minute. It works inside ChatGPT, Claude, Gemini, Perplexity, Grok and the Gemini Notebook you already use.

Add to Chrome Read the docs

Join 100,000+ people. Works in Chrome, Edge, Brave and other Chromium browsers.