The honest comparison nobody else will write
NotebookLM is exceptional at one thing: synthesizing sources into grounded, citation-backed answers. Google built something genuinely different here. We’re not going to pretend otherwise.
But NotebookLM was designed as a research assistant — not a knowledge operating system. The moment you need to do something with your research, the gaps become obvious.
What default NotebookLM gives you
| Feature | Default NotebookLM |
|---|---|
| AI answers from your sources | ✅ Excellent |
| Audio Overview (podcast) | ✅ Built-in |
| Source upload (PDF, doc, YouTube) | ✅ Works well |
| Export your sources | ❌ Not possible |
| Export chat history | ❌ Not possible |
| Notebook organization | ❌ Flat list only |
| Search across notebooks | ❌ Doesn’t exist |
| Automation | ❌ Manual only |
What Kortex adds on top
Kortex doesn’t replace NotebookLM — it installs as a browser extension and adds features directly inside the NotebookLM interface.
Export: unlock your data
This is the #1 request from NotebookLM users. Kortex lets you export:
- Sources — individual files or entire notebooks as PDF, Markdown, or ZIP
- Chat conversations — full dialogue with citations
- Artifacts — Briefing Docs, Study Guides, FAQs
Organization: escape the flat list
With 20+ notebooks, default NotebookLM becomes unmanageable. Kortex adds:
- Collections — group notebooks into folders
- Color-coded tags —
#research,#client,#urgent - Smart Search — real-time search across all notebook titles and tags
Automation: set it and forget it
This is where Kortex separates itself. Instead of manual steps, you define rules:
- When a new notebook is created → run Auto-Researcher to generate a Briefing Doc
- When a notebook is tagged
#podcast→ add its Audio Overview to my RSS feed - When tag
#urgentis added → also add#priority
Where default NotebookLM wins
Simplicity. If you have 5 notebooks and never need to export anything, Kortex adds complexity you don’t need.
Mobile. NotebookLM’s mobile experience is usable. Kortex is a desktop browser extension — it doesn’t run on mobile.
Cost. Kortex is free for up to 10 exports and 10 imports per day. Heavy users need a paid plan starting at $6/mo.
Who should use Kortex
Add Kortex if you:
- Have more than 10 active notebooks
- Need to export research for reports, teams, or other tools
- Want to automate repetitive research workflows
- Use Audio Overviews and want a personal podcast feed
Stick with default NotebookLM if you’re an occasional user with a small number of notebooks and no need to move data out.
Bottom line
NotebookLM is the engine. Kortex is the cockpit. They’re better together.