Perplexity vs NotebookLM
One answers from the live web, one answers from your own documents — which do you need?
Users rate NotebookLM highest of the 2 we can score
NotebookLM sits at 4.86★ from 55k reviews (#3 of 14 tools we can rank), against Perplexity at 4.63★ from 2.6m reviews (#12). That is a verdict on the app people use, not on the work it produces — we have not tested either on a task suite.
Ranked on app-store ratings, weighted by review count — the same ranking every tool page on this site uses
These answer two different questions. Perplexity gives you real-time answers to anything, from the web. NotebookLM answers only from the documents you give it, and makes summaries and study guides from them. If your source material is already on your hard drive, they are not competing.
What each one looks like
We have no dated capture of Perplexity yet, so none is shown.
Side by side
Every cell is either a fact with the source and the date we read it, or a sentence saying we hold no verified answer. There is no third option: nothing here is filled in from memory, and a row only appears when at least one of these tools has something real in it.
Swipe the table sideways for NotebookLM.
| Measure | Perplexity | NotebookLM |
|---|---|---|
| What users rate itApp-store ratings, ranked by rating weighted by review count — so a 4.88 from three million reviews outranks a 4.9 from four thousand. | 4.63★2.6m reviews on App Store + Google Play · #12 of 14 we can rankApple App Store (iTunes Lookup API) · 17 Aug 2026 | 4.86★55k reviews on App Store · #3 of 14 we can rankApple App Store (iTunes Lookup API) · 17 Aug 2026 |
| What people are sayingFrom our own 90-day sweep of Reddit, X, YouTube, Hacker News and the web. The count always travels with the word. | Mixed4 positive, 4 negative of 8 that took a side (101 scanned) | Positive6 of the 7 posts that took a side (41 scanned) |
| How long they keep it | They keep your data for as long as they need it to fulfill their purposes, with no specific end date.perplexity.ai ↗ | They keep the content you create or upload until you delete it or ask them to remove it.policies.google.com ↗ |
| Last app update we sawThe date on the vendor's own app-store listing when we last read it — a rough read on whether the product is still moving. | 10 Aug 2026Apple App Store (iTunes Lookup API) · 17 Aug 2026 | 12 Aug 2026Apple App Store (iTunes Lookup API) · 17 Aug 2026 |
Each one on its own
People use it to get real-time answers to any question they have.
In their words: “Perplexity is a free AI-powered answer engine that provides accurate, trusted, and real-time answers to any question.” — perplexity.ai ↗ · read 9 Aug 2026
“Perplexity's New AI Agent Update is INSANE”
a mixed post from our 90-day sweep — read it ↗
NotebookLM
GoogleYou give it your own documents and it answers questions, summarises and makes study guides from them.
In their words: “AI Research Tool & Thinking Partner” — notebooklm.google ↗ · read 10 Aug 2026
“How this Workflow helps me to Turn 80 Pages of Course Material Into 20 Pages of Comprehensive Notes Using NotebookLM . I call it the Exam Saver technique.”
a positive post from our 90-day sweep — read it ↗
What we could not compare
- No tested score for Perplexity and NotebookLM — we score a tool only when it names the model it runs.
- No verified price for Perplexity and NotebookLM — their pricing pages render figures in a browser, so we hold none.
- We could not find a quotable sentence about training data for Perplexity and NotebookLM.
These gaps close by themselves: the scanner re-reads every vendor pricing page and app-store listing on a schedule, and this page rebuilds from whatever it found. How the testing works →
Questions people ask
Perplexity or NotebookLM — which should I choose?
Users rate NotebookLM highest of the 2 we can score. That is based on app-store ratings, weighted by review count — the same ranking every tool page on this site uses. NotebookLM sits at 4.86★ from 55k reviews (#3 of 14 tools we can rank), against Perplexity at 4.63★ from 2.6m reviews (#12). That is a verdict on the app people use, not on the work it produces — we have not tested either on a task suite.
Which of Perplexity, NotebookLM is cheapest?
We hold no verified price for any of them: each publishes its figures only to a browser, so we link to their pricing pages rather than quote a number we could not read.
How do you test these?
We have not run a task suite on these. We score a tool only when it names the model it runs, because a coding assistant or notetaker is a wrapper around a model — so this page compares what we can verify instead: prices from vendor pricing pages, app-store ratings, our 90-day sweep of public opinion, and each company's own written data policy.
No vendor pays for placement, position or inclusion, and the code that produces the verdict above cannot see which outbound links earn us anything. How we make money →
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