Google's AI research notebook with the legendary Audio Overviews
NotebookLM by Google is a research and note-taking tool that grounds AI answers in your uploaded sources. The viral Audio Overviews feature turns documents into a two-host podcast you can listen to. Free tier is generous; NotebookLM Plus ships with Google AI Pro.
Google's AI research notebook. Upload sources, get grounded answers, mind maps, briefing docs, and the famous Audio Overviews podcast generation.
The free tier is one of the most generous in AI in 2026. Try it for any topic you want to learn about quickly.
| Plan | Price | What you get |
|---|---|---|
| Free | $0 |
|
| NotebookLM Plus (via AI Pro) | $20 per month |
|
Pricing last verified May 1, 2026
NotebookLM is one of the best free AI tools that exists in 2026. Audio Overviews alone make it worth using. NotebookLM Plus (via Google AI Pro) adds more sources and customization.