The short answer
NotebookLM vs Perplexity: Google's Gemini Notebook, called NotebookLM until 16 July 2026, answers only from sources you add, so it wins for studying documents, papers and long reports you already have. Perplexity, from Perplexity AI, Inc., searches the web and cites every answer, so it wins for finding new information and current news. Gemini Notebook's free Standard plan holds 100 notebooks with 50 sources each.
| Gemini Notebook (NotebookLM) | Perplexity | |
|---|---|---|
| Made by | Google, United States | Perplexity AI, Inc., San Francisco |
| Where answers come from | Only the sources in your notebook | A live web search for every answer |
| Free plan | Standard: 100 notebooks, 50 sources each, each up to 500,000 words or 200 MB | Cited answers for limited daily usage (pricing page), limited uploads |
| Citations | Point to passages in your own sources | Numbered links to web pages |
| Source types | PDF, Word, Google Docs and Slides, web URLs, YouTube videos, audio, images and more | The open web, Wiley content, connected apps on paid plans |
| Outputs | Audio Overviews, Video Overviews, slide decks, reports, quizzes, flashcards | Answers, tables, and reports and files via Perplexity Computer |
| Models | Gemini models; Google does not name the version | Choice of GPT-6.1 Sol, Claude Opus 5.5, Gemini 4 Argon and others on paid plans |
| Paid plans | Through Google AI Plus, Pro and Ultra; Enterprise via Google Cloud | Pro, Max, Enterprise Pro, Enterprise Max |
| Training on your data | Personal content not used to directly train models unless you give feedback | On by default for Free, Pro and Max until switched off |
The short verdict: NotebookLM or Perplexity?
These two tools answer different questions. Perplexity answers "what is out there?" by searching the web and citing what it finds. Gemini Notebook, the tool most people still call NotebookLM, answers "what do these documents say?" by reading only the sources you put in a notebook. Google renamed it on 16 July 2026, synced notebooks with the Gemini app, and moved the help centre to support.google.com/gemininotebook. Nothing about its core idea changed.
So the honest verdict is not "one is better". It is: use Perplexity to find and check sources, then put the good ones into Gemini Notebook to study them. Below is the winner for each kind of work, based on Google's and Perplexity's own help, blog and pricing pages, not on tests we ran.
Research with sources: Perplexity wins
If you do not yet have the sources, Perplexity is the tool. It searches the web for every question and answers with numbered citations, and paid plans add Deep Research and model choice. Gemini Notebook cannot go and find new information for a normal chat answer: Google is clear that it answers only from the sources in your notebook. That is its strength and its limit.
Citations you can check: Gemini Notebook wins
Both cite, but the citations mean different things. A Perplexity citation points to a web page that might be strong, weak or out of date. A Gemini Notebook citation points to a passage in a document you chose, so checking it is fast and the source is one you already trust. For anything you must defend line by line, such as a policy summary or a contract review, that is a real advantage. The catch, in Google's own logic: a notebook built from weak or one-sided sources gives confident, well-cited answers that are still wrong for your question.
Current news: Perplexity wins
This is not close. Perplexity searches the live web every time and, since 5 October 2026, can run a scheduled news digest with Automations in Computer. Gemini Notebook knows only what you added. You can add web URLs as sources, but it will not notice that something new was published tomorrow.
Academic papers: Gemini Notebook wins for reading, Perplexity for finding
For working with papers, Gemini Notebook is the better tool. It takes PDFs, keeps up to 50 sources per notebook on the free plan (300 on Google AI Pro), and turns a stack of papers into reports, quizzes, flashcards and Interactive Learning Overviews. Since 29 October 2026 it also offers students in the US and India hundreds of free textbooks as sources, from providers including OpenStax. Perplexity is better at the step before: finding papers, and since October 2026 it can search and cite Wiley journals and books on all plans. If you have to pick one winner for academic work, pick Gemini Notebook, and use Perplexity or Elicit to build the reading list.
Writing: Gemini Notebook wins, for grounded drafts
Neither is a first-class writing tool. Gemini Notebook wins because its outputs stay inside your sources: a briefing report, a slide deck (with a guided flow and Review step since 16 October 2026) or a study guide drawn only from what you added, with citations back to it. Perplexity drafts from whatever it found online. For polished final prose, use a writing assistant such as Claude or ChatGPT afterwards.
Files and long documents: Gemini Notebook wins
This is Gemini Notebook's home ground. Each source can be up to 500,000 words or 200 MB, and it accepts PDF, Word, text, Markdown, CSV, PowerPoint, Google Docs, Slides (up to 100 slides), Sheets, images, audio files, ePub, web URLs and public YouTube videos with captions. Audio Overviews turn a long report into a podcast-style summary in more than 80 languages, and Video Overviews turn it into a short explainer. Perplexity's free plan allows only limited uploads, and long documents are not what it is built for.
Privacy: Gemini Notebook wins
Google says content in Gemini Notebook on personal accounts is not used to directly train its foundational models unless you give feedback; feedback may be read by trained reviewers after being disconnected from your account and kept for up to three years. So the practical rule is simple: do not press thumbs up or down on sensitive notebooks. On work and school accounts, uploads, questions and answers are not human reviewed or used for training, even with feedback. One wrinkle: notebook chats held inside the Gemini app follow your Gemini Keep Activity setting.
Perplexity trains on Free, Pro and Max by default. To stop it, open Account settings, then Preferences, and switch off AI data retention; the opt-out covers future data only. Enterprise Pro and Enterprise Max are never used for training.
Value: Gemini Notebook wins
Gemini Notebook's Standard plan is free with a Google account: 100 notebooks, 50 sources each, Audio and Video Overviews and study tools, with usage limits that refresh every five hours for personal accounts since 2 September 2026. Paid Google AI plans raise the limits. Perplexity's free plan is also good, giving cited answers that its pricing page describes as good for limited daily usage, but the features that save the most time, such as Deep Research and Computer, need a paid plan. For light use, both free plans together cost nothing and cover research from start to finish. See the Gemini Notebook plans page and the Perplexity pricing page.
Same task, both tools: understanding a new regulation
Task: "Our company must comply with a new data regulation. Explain what it requires of a 50-person software company, and help my team learn it." This is how each tool handles it, from documented features.
In Perplexity
- Ask what the regulation requires, which dates apply and which official guidance exists, using regulators and official journals only. Perplexity answers with numbered citations you can open.
- Ask for the official text and guidance documents as links. Open them and download the PDFs.
- Ask follow-ups about recent changes or enforcement news; Perplexity keeps searching the live web.
In Gemini Notebook
- Create a notebook and add the official text, the guidance PDFs and your own data processing policy as sources.
- Ask "What does this require of a 50-person software company, and where does our current policy fall short?" Every point cites a passage in the regulation or in your policy.
- Create an Audio Overview for the team's commute and a quiz to check they understood it.
Perplexity found the right documents and the latest news. Gemini Notebook turned them into answers your team can trust and learn from. That is the workflow we recommend.
Who should pick which
- Pick Perplexity if you need to find information you do not have yet: market research, news, fact checks, vendor comparisons. It is not the right tool for studying a fixed set of documents closely.
- Pick Gemini Notebook (NotebookLM) if you already have the material: students, researchers, lawyers, analysts reading reports, anyone onboarding onto a big topic. It is not for current events or anything outside your sources.
- Use both for serious research: find with Perplexity, study with Gemini Notebook. Both free plans are generous enough to start.
- Teams on Google Workspace get Gemini Notebook with no human review and no training on their content, and Gemini Notebook for Enterprise through Google Cloud adds higher limits and extra security controls. Research-heavy teams that need the open web should trial Perplexity Enterprise Pro, which is never used for training.
One practical tip if you use both: since 23 October 2026 you can type @Gemini Notebook in the Gemini app to create notebooks, add sources and ask questions without leaving the chat (in the EEA you switch this on under Settings, then Connected Apps). That makes it quicker to move a list of sources from your research into a notebook.
Learn them properly with our free lessons at /learn?tool=notebooklm and /learn?tool=perplexity, read How to use Gemini Notebook and How to use Perplexity, or see Gemini vs Perplexity and Compare.
Prompts to copy
Build a reading list (Perplexity)
Find the 8 most authoritative sources on [topic]: official documents, regulators, peer-reviewed papers or reputable reports from the last [number] years. For each, give the title, publisher, date, a link and one sentence on why it matters.
You get: A dated, linked source list ready to add to a notebook
Gap check against your sources (Gemini Notebook)
Using only these sources, list what [regulation or standard] requires and compare it with our [policy name]. For each requirement, say whether our policy meets it, partly meets it or misses it, and cite the passage.
You get: A cited gap analysis grounded only in your documents
Find where sources disagree (Gemini Notebook)
Where do my sources disagree with each other about [question]? Quote the conflicting passages, name the source of each and say which one is more recent.
You get: The contradictions in your reading, with citations
Turn sources into a team briefing (Gemini Notebook)
Using only these sources, write a two-page briefing for [team] on [topic]: what it is, what changes for us, the three biggest risks and the decisions we need to make. Cite a passage for every point and say plainly where the sources are silent.
You get: A cited team briefing that stays inside your chosen sources