Comparison
ChatPDF vs NotebookLM vs Wurz for tax documents
Which one should you use? For a single PDF, ChatPDF: fast and cheap. For research and synthesis across mixed sources, Gemini Notebook (the tool formerly known as NotebookLM). For client files full of Mexican tax documents (CFDI, bank statements), kept separate per client and without handing over the originals, Wurz. Details and honest verdicts below.
Published August 24, 2026 · Updated August 26, 2026
One naming note before we start: Google renamed NotebookLM to Gemini Notebook in July 2026. Same product. We use the new name in the body; the title keeps the old one because that's still what everyone types.
Side by side
The table
| Criterion | ChatPDF | Gemini Notebook (NotebookLM) | Wurz |
|---|---|---|---|
| Built for | Asking questions of a PDF (or a folder of PDFs) | Research and synthesis across mixed sources: PDFs, sites, videos, notes | Asking questions of each client's tax file: CFDI invoices, bank statements, workpapers |
| Where your files live | On ChatPDF's servers, encrypted (checked 2026-08-24) | On Google, uploaded into the notebook | In your own Google Drive, OneDrive or Dropbox. Wurz stores summaries and references, not the file |
| Cites the source | Yes, anchors answers to references in the PDF | Yes, verbatim quote plus jump-to-passage | Yes, which document and which passage, checked against the source |
| Mexican tax documents (CFDI, SAT) | Not its case: treats them as generic PDFs | Same: can't tell a CFDI from an essay | Yes, this is the core case. Automatic OCR included |
| Separate clients | Folders and multi-file chats | One notebook per topic, up to 50 sources each on the free plan | Workspaces per firm or per client, with client and period filters |
| Permissions and audit | We didn't verify this | Google Docs-style sharing | 4 permission levels and an audit log |
| Languages | Upload in any language, ask in yours | Dozens of interface languages | Product in Spanish, English and Portuguese |
| Free plan | 2 documents per day (checked 2026-08-24) | 100 notebooks, 50 sources per notebook, 50 chat queries per day (checked 2026-08-24) | Yes, free plan |
| Paid entry price | Paid Plus plan; we didn't verify the price | Via Google AI Pro: bumps you to 500 queries per day and 300 sources per notebook | From MXN $349 per month |
If you only came for the table, there it is. The rest is for deciding properly.
In common
What all three do equally well
Citing. Worth saying upfront, because it's the first thing people compare: all three show you where the answer came from. Gemini Notebook gives you the verbatim quote and jumps to the passage. ChatPDF anchors its answer to references inside the PDF. Wurz tells you which document and which passage, and checks the citation against the source. None of them asks for blind faith.
The real difference sits in two other questions: who keeps your files, and whether the tool knows that a CFDI issued through Mexico's SAT is not just another PDF.
ChatPDF: wins on the single PDF
An 80-page contract lands in your inbox, you need the penalty clause, and you never plan to open that file again. ChatPDF is unbeatable there: upload, ask, done. The free plan covers 2 documents a day, which is plenty for that use. It supports folders and multi-file chats, so a small batch works too.
Worth knowing: your documents are uploaded to ChatPDF's servers and stay there, encrypted, until you delete them. For your own contract, no problem. For a client's bank statement, that's a call you make, not the tool.
Gemini Notebook: wins on research
You're building an opinion on something new, say a tax regime reform, and you have the bill, three articles, a video and your notes. Gemini Notebook crosses all of it, synthesizes, and lets you question the whole set. For studying, preparing a course or writing an article, it's the best of the three, and the free plan is generous: 100 notebooks with 50 sources each.
Worth knowing: sources are uploaded to Google, and the product thinks in topics, not clients. You could set up one notebook per client, but period filters, role-based permissions and a log of who looked at what don't exist, because it was never meant for accounting firms. It's a research notebook, and as a research notebook it's very good.
Wurz: wins on client files
You handle 40 clients. Each has their CFDI invoices, bank statements and workpapers in a Drive folder. A client calls: “which invoice has the truck expense?”. Today that gets solved by opening PDFs one at a time. It doesn't cost money, it costs your evening.
Wurz connects to your Google Drive, OneDrive or Dropbox and you ask in plain language, filtered by client and period. The originals never leave your cloud: Wurz stores summaries and references, not the file. This is third-party information and you're the one who answers for it, so the tool is built so you never have to hand it over.
Around that core sits what a firm needs and the other two don't carry: separate workspaces per firm or per client, 4 permission levels so a junior doesn't see what isn't theirs, an audit log, automatic OCR for scanned documents, and export to Excel or Word. There's a free plan to try it; paid starts at MXN $349 per month.
The limits
When NOT to use Wurz
We'd rather say this ourselves, because a badly matched user is a user who leaves.
- One-off PDF you'll never revisit: ChatPDF solves it in two minutes, probably free.
- Research and synthesis across mixed sources (articles, videos, statutes, notes): Gemini Notebook was built for exactly that.
- If you want to issue invoices, post journal entries or run your books, Wurz does none of that. Wurz sits next to your accounting system, it doesn't replace it.
- If your documents don't live in Google Drive, OneDrive or Dropbox, Wurz can't help you today.
If none of the three quite convinces you, start with what you already have installed: you can search several PDFs at once with Windows, Acrobat or Drive, and the guide says where each one hits its limit. If what you're actually doing is matching bank charges against invoices, that lives on the bank reconciliation page.
FAQ
Frequently asked questions
Is it safe to upload my clients' information to ChatPDF or Gemini Notebook?
Depends on what you signed with your client and on your risk tolerance. In both cases the files go to the provider's servers (ChatPDF stores them encrypted; Gemini Notebook hosts them at Google). With Wurz the originals stay in your own cloud and Wurz keeps summaries and references. The underlying question is the same with any tool: can you explain to your client where their papers are?
Can NotebookLM handle CFDI invoices?
You can upload CFDI PDFs to Gemini Notebook and ask away, but it treats them as generic documents: it doesn't know issuer, receiver, UUID or period, and it can't filter by client. Fine for one isolated invoice; not its case for a client file with hundreds of them.
If all three cite sources, what's the actual difference?
Two things: where your files end up (on ChatPDF's and Google's servers, or in your own cloud with Wurz) and whether the tool understands the Mexican tax case: filtering by client and period, separate workspaces per firm, role-based permissions and an audit log.
What happened to NotebookLM? Is it gone?
It's alive, under a new name. Google renamed it Gemini Notebook in July 2026. Same product, same notebooks.
Can I try Wurz for free with a real client?
Yes. The free plan connects your cloud and lets you ask questions; the originals never leave your Drive, so trying it doesn't mean handing over anyone's papers. If it earns its keep, paid starts at MXN $349 per month.
What if Wurz says the answer isn't there?
That's information: it means the data isn't in that client's files for that period, not that the tool made something up to look useful. Wurz says “not in your files” rather than filling the gap. What follows is the usual: ask the client for the document.
Try it with your real documents
Upload a handful of receipts from your most demanding client and ask the question that normally takes you half an hour. That's how you'll know if it's worth it.
No credit card. Nothing to install.