KastorFlowUpdated October 17, 2026
Gemini Notebook statistics
NotebookLM's numbers in one place, each with its date and source.
Gemini Notebook, called NotebookLM until July 16, 2026, is Google's AI research notebook. “notebooklm” was searched about 13.5 million times in the 28 days to October 13, 2026. A free notebook holds 50 sources and a paid one up to 600, and since September 2, 2026 usage refreshes every 5 hours up to a weekly limit. Google hasn't published how many people use it.
Search
13.5M
searches for “notebooklm” in the 28 days to October 13, 2026
Similarweb
63%
of those searches end without a click
Similarweb
2.3×
“gemini notebooklm” searches against their average month
Similarweb
Plans and limits
50
sources per notebook on the free plan; 100, 300 and up to 600 on Google AI Plus, Pro and Ultra
Google
100
notebooks on the free plan; 200 with AI Plus, 500 with AI Pro and Ultra
Google Help
5 hours
between usage refreshes since September 2, 2026, up to a weekly limit
Google Help
Developers
8,895
public GitHub repositories with “notebooklm” in the name
GitHub search, October 17, 2026
134,206
downloads of the unofficial Python client notebooklm-py in 30 days
PyPI
178
repositories with both “notebooklm” and “mcp” in the name
GitHub search
Learning and research
−17%
exam scores after students practiced with unrestricted ChatGPT; a structured AI tutor more than doubled learning gains instead
Bastani et al. 2025; Kestin et al. 2025
d = 0.85
spaced practice, the most effective of 10 study techniques; practice testing is next at 0.74
Donoghue & Hattie 2021
18%
of GPT-4's academic citations were fabricated in a 2023 test, the case for tools that answer from your own sources
Walters & Wilder 2023
Users
Google hasn't published how many people use Gemini Notebook or NotebookLM. Figures such as 17 million or 30 million monthly users appear on statistics sites without a primary source, so we don't repeat them as fact.
Timeline
| Date | Milestone | Source |
|---|---|---|
| May 10, 2023 | Announced as Project Tailwind | The Verge, via Wikipedia |
| September 11, 2024 | Audio Overviews arrive | Google, via Wikipedia |
| December 13, 2024 | NotebookLM Plus for businesses | TechCrunch, via Wikipedia |
| February 10, 2025 | NotebookLM Plus for individuals | TechCrunch, via Wikipedia |
| July 2025 | Video Overviews | PPC Land |
| December 19, 2025 | Data tables in Studio | 9to5Google, via Wikipedia |
| July 16, 2026 | Renamed Gemini Notebook; a cloud computer per notebook | |
| September 2, 2026 | Compute-based usage limits replace daily counts | Google Help |
Use these numbers
Quote any number with a link to this page. Suggested credit: KastorFlow, “Gemini Notebook (NotebookLM) statistics 2026,” https://kastorflow.com/stats/, updated October 17, 2026.
Questions
How many people use NotebookLM?
Google hasn't published a user count for Gemini Notebook or NotebookLM. Figures such as 17 million or 30 million monthly users appear on statistics sites without a primary source.
When was NotebookLM renamed Gemini Notebook?
On July 16, 2026. It is the same product under a new name.
How many sources can a Gemini Notebook hold?
50 on the free plan, 100 with Google AI Plus, 300 with Google AI Pro and up to 600 with Google AI Ultra.
How often is NotebookLM searched?
About 13.5 million searches for “notebooklm” worldwide in the 28 days to October 13, 2026 (Similarweb).