NotebookLM Statistics 2026: Users, Growth and Adoption

NotebookLM’s total user base doubled after the mobile app launched, while the daily rate of Audio Overviews doubled two weeks after Google expanded the feature past 80 languages. Google frames that growth as a series of doublings rather than a published total, leaving its own posts as the clearest trail of NotebookLM’s adoption.

The figures below cover adoption, language reach, plan limits, and the newest Gemini research benchmarks, each traced to a Google Labs or Google Workspace primary source.

Key Takeaways

• Google reports millions of people and tens of thousands of organizations use NotebookLM, without ever publishing an exact user count.
• Total NotebookLM users doubled after the mobile app launch, one of two doublings that followed the jump to 80 languages.
• The daily rate of Audio Overviews doubled in just two weeks after Google widened the feature past 80 languages.
• NotebookLM’s free tier caps each notebook at 50 sources and 500,000 words per source.
• NotebookLM Plus, the paid tier since December 13, 2024, raises core caps by more than five times across Audio Overviews, notebooks, and sources.
• In June 2026, the Gemini 3.5 upgrade scored an average win rate of over 65% against the prior version in Google’s own evaluations.

Editor’s Choice

• NotebookLM users generated more than 350 years’ worth of Audio Overviews in a single three-month span.
• The free plan includes 100 notebooks, 50 chat queries per day, and 3 audio generations per day.
• Audio Overview language support grew from 4 languages to 80.
• Each notebook now ships with a secure cloud computer carrying more than 100 curated software skills.
• Gemini 3.5 won 69.9% of large-document matchups and 78.2% of web-research matchups.
• The NotebookLM mobile app launched on May 19, 2025, for iOS 17 and later and Android 10 and later.

NotebookLM User Adoption and Scale

NotebookLM’s reach is described in words, not counts, according to Google Labs. The company frames the product’s size with “millions” and “doublings” rather than a headline figure, which makes the adoption picture a curve rather than a single number.

• Google Labs reported millions of people and tens of thousands of organizations using NotebookLM as of December 2024.
• That “millions of people and organizations” framing was still Google’s language in June 2026, eighteen months later.
• The total NotebookLM user base doubled in the weeks after the mobile app launch, according to Google.
• Users generated more than 350 years’ worth of Audio Overviews over one three-month window in late 2024.
• The original NotebookLM prototype was built in six weeks by four to five people working part-time.
• NotebookLM Plus arrived on December 13, 2024, later folding into Google One AI Premium.

Source: Google (The Keyword), Google Labs

The refusal to publish an absolute number is itself the story. Across our 50-plus platform statistics pages, mature products usually trumpet a round user milestone; NotebookLM’s choice to lead with doublings signals a team optimizing for engagement velocity over a vanity total. The same disclosure gap shows up in Character AI usage statistics, where reach is reported in engagement terms rather than a hard account total.

Audio Overviews Growth and Daily Usage

Audio Overviews drove one of NotebookLM’s fastest usage jumps, according to Google. The podcast-style feature, where two AI hosts hold a spoken “deep dive” about a user’s sources, launched on September 11, 2024.

• The daily rate of Audio Overviews doubled in just two weeks after the language expansion.
• Users produced more than 350 years of Audio Overview audio in a single three-month span.
• Audio Overviews launched on September 11, 2024, with two AI hosts running a spoken deep dive.
• Audio Overviews in over 80 languages moved from short-form clips to full-length episodes in August 2025.
• Large notebooks can take several minutes to render an Audio Overview.

Source: Google (The Keyword), Google Labs, 2025

By the numbers: Google reported that daily Audio Overviews doubled within two weeks of the 80-language expansion, then total users doubled weeks later after the mobile app shipped. Two compounding doublings in one product cycle is the clearest growth signal Google has disclosed for NotebookLM.

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Recent Developments

• June 8, 2026: Google moved NotebookLM onto Gemini 3.5 and Antigravity and gave each notebook a secure cloud computer that writes and runs code.
• June 2026: The upgraded system posted an average evaluation win rate of over 65% against the previous NotebookLM.
• March 20, 2026: Google added Cinematic Video Overviews, ten new infographic styles, EPUB support, and PPTX export.
• March 2026: Saved, secure conversation history and per-slide revision feedback arrived.
• November 13, 2025: Deep Research shipped, browsing hundreds of websites on the user’s behalf to build a report.

Language Expansion Across Audio and Video Overviews

Language coverage powered NotebookLM’s daily-usage growth. Google widened Audio Overviews in stages and brought Video Overviews to the same 80-language scale.

• Audio Overviews grew through 4, then 10, 20, 50, and 80 languages.
• Audio Overviews reached over 50 languages in beta on April 29, 2025.
• Video Overviews became available in 80 languages globally in August 2025.
• Audio Overviews in over 80 languages upgraded from short clips to full-length episodes.

The staged rollout maps onto a wider pattern. Our AI coverage keeps showing that distribution reach, not benchmark scores, tends to move daily-usage numbers first; NotebookLM’s language ladder is a textbook case. Model-quality gains show up later, a dynamic our Claude versus ChatGPT benchmark data documents across update cycles.

NotebookLM Free vs Plus Plan Limits

NotebookLM offers a free plan with fixed limits, and the paid tier multiplies them. NotebookLM Plus raises the core caps by more than five times over the free plan.

• The free plan includes 100 notebooks total.
• Each free notebook holds up to 50 sources.
• Every source can run to 500,000 words.
• Free users get 50 chat queries and 3 audio generations per day.
• NotebookLM Plus offers more than five times more Audio Overviews, notebooks, and sources per notebook.
• Plus also adds shared team notebooks with usage analytics and response-style controls.

Source: Google (NotebookLM Help), Google Labs, 2026

Audio Overviews Feature Statistics

Audio Overviews are a core NotebookLM output. Google has expanded the feature’s length and language coverage steadily since launch.

• Audio Overviews debuted on September 11, 2024.
• NotebookLM Plus, launched December 13, 2024, raised the Audio Overview cap by more than five times.
• Audio Overviews reached full-length form in over 80 languages in August 2025.
• Users generated more than 350 years of Audio Overview audio in one three-month stretch.

Why it matters: Google tied both of NotebookLM’s 2025 doublings to Audio Overviews and the mobile app, not to the chat interface. A spoken, multilingual summary format, per Google’s own metrics, converted casual readers into daily users faster than text answers did.

Video Overviews, Studio and Output Formats

Video Overviews became available in 2025. Google added a cinematic mode for Video Overviews and expanded output formats in 2026.

• Video Overviews became available in 80 languages globally in August 2025.
• March 2026 added Cinematic Video Overviews, immersive deep-dive videos with fluid animations, in English.
• Google added ten new infographic styles, including Sketch Note, Kawaii and Bento Grid.
• March 2026 also brought EPUB support and PPTX export for slide decks.

Source: Google (The Keyword), Google Workspace Updates, 2026

Our reading of the roadmap is that output variety, not answer accuracy alone, is where NotebookLM competes. The Studio’s steady march from audio to cinematic video to exportable decks tracks the engagement-over-growth pattern we see across our platform statistics coverage.

Deep Research and Source Handling

Deep Research gave NotebookLM web-scale research capability in late 2025. The mode browses hundreds of websites on the user’s behalf and returns a structured report or a list of recommended sources.

• Deep Research browses hundreds of websites to compile a report.
• November 2025 also added support for Google Sheets, Drive files as URLs, images, Drive PDFs, and Microsoft Word (.docx) files.
• Each source still accepts up to 500,000 words.
• Free notebooks accept up to 50 sources each.

The takeaway: Google (NotebookLM Help) sets the free per-source ceiling at 500,000 words, and Deep Research browses hundreds of websites to assemble a notebook. Together they push NotebookLM well past the single-document summarizers it competed with at launch.

Deep Research effectively runs many queries per report, a scale worth reading against Google Search usage statistics and their daily query volumes.

Gemini 3.5 Upgrade and Performance Benchmarks

June 2026 brought published head-to-head NotebookLM benchmarks. Running on Gemini 3.5 and Antigravity, the new build beat the previous NotebookLM in the majority of evaluations and gained the ability to write and run code.

• Gemini 3.5 posted an average win rate of over 65% against the prior version.
• It won 69.9% of large-document analysis matchups.
• It won 78.2% of web-research matchups.
• Each notebook gained a secure cloud computer with more than 100 curated software skills.
• The system moved onto Gemini 3.5 and Antigravity on June 8, 2026.

Published win rates are unusual for Google. Our AI benchmark coverage documents how quickly these rankings shift, so a 65% average win rate reads as a snapshot that will likely be restated within a couple of update cycles. The same volatility shows up in the broader model race our AI job impact statistics track alongside adoption.

New Output Formats After Gemini 3.5

The June 2026 build expanded what a notebook can produce well beyond text. NotebookLM can now generate spreadsheets, charts, documents, and structured data across more than 100 curated software skills.

• Notebooks can output Excel spreadsheets and PowerPoint presentations.
• Notebooks can produce PNG and SVG charts plus DOCX and Markdown documents.
• Structured data now exports as CSV and JSON files.
• Agentic source discovery uses Google Search to find and add high-quality sources to a notebook.

Source: Google (The Keyword), June 2026

NotebookLM in Google Workspace and Education

NotebookLM became Google Workspace infrastructure in early 2025. Google opened it to all education users by August 2025.

• NotebookLM and NotebookLM Plus became Google Workspace core services on February 5, 2025.
• Core-service status brought enterprise-grade data protections under existing Workspace terms.
• NotebookLM opened to all education users of all ages on August 4, 2025.
• Education access spans Workspace for Education Fundamentals, Standard and Plus tiers.

Mobile App and Platform Reach

The NotebookLM mobile app was the trigger for the second user doubling. Google shipped it on May 19, 2025 for both major mobile platforms.

• The app launched on May 19, 2025 on Android and iOS.
• It requires iOS 17 and later on iPhone and iPad.
• It requires Android 10 and later on phones and tablets.
• The total user base doubled in the weeks after the app shipped.

A launch that doubles a user base sits differently against the wider app store download statistics that frame the mobile economy. NotebookLM’s Workspace ties also invite comparison with Microsoft 365 adoption statistics on the productivity-suite side.

How many users does NotebookLM have?

Google has not published an exact NotebookLM user count. The company states that millions of people and tens of thousands of organizations use the tool, and that the total user base doubled after the mobile app launch. For NotebookLM statistics, “millions” and “doubled” are the most precise figures Google discloses.

Is NotebookLM free to use?

NotebookLM has a free plan with substantial limits. The free tier includes 100 notebooks, up to 50 sources per notebook at 500,000 words each, 50 chat queries per day, and 3 audio generations per day. NotebookLM Plus raises the Audio Overview, notebook, and source caps by more than five times.

Conclusion

Google chose its NotebookLM disclosures deliberately. The company describes reach with millions of people, tens of thousands of organizations, and two user-and-usage doublings, one after Audio Overviews reached 80 languages, rather than a single published total. The clearest hard performance numbers are the Gemini 3.5 win rates of up to 78.2% that Google published in June 2026.

The trajectory points at deeper Workspace and education integration paired with faster model turnover. If the historical pattern we track holds, the Gemini 3.5 benchmarks will be restated within a couple of update cycles, and the next growth signal will again arrive as a doubling rather than a disclosed count.