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Comparison

Sidenote vs Adobe Acrobat AI Assistant

Acrobat's AI Assistant answers about PDFs opened inside Acrobat; Sidenote reads whatever your browser has open, PDF, wiki or web page, and cites the exact passage.

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Sidenote

Reads every tab, not one file type: PDFs, wikis, Google Docs and the open web, cited in place.

Adobe Acrobat AI Assistant

A PDF chat add-on inside Acrobat, working on files you open there.

The short answer

Should you use Sidenote or Acrobat AI Assistant?

Choose Sidenote if…

You read across PDFs, Confluence, Notion, SharePoint, Google Docs and articles and want answers in place, without uploading anything. Citations scroll to the exact passage, and there's a free tier.

Choose Acrobat AI Assistant if…

Your work lives in PDF files inside Acrobat, you already pay for Acrobat, and you also need to edit, sign, redact and organize those PDFs in the same place.

Plenty of people use both. Acrobat manages the PDF files; Sidenote reads everything across the browser.

Compared honestly

Sidenote vs Acrobat AI Assistant: feature by feature.

CapabilitySidenoteAdobe Acrobat AI Assistant
Reads the page or PDF you already have open in the browserYesNo
Works on private Confluence, Notion & SharePoint pagesYesNo
Works on Google Docs, web articles & live web pagesYesNo
Chats with & summarizes PDFsYesYes
Reads scanned, image-only PDFs via OCRYes Partial
Citations scroll & highlight the exact passageYes Partial
Server-side citation check drops unsupported claimsYesNo
Ask across many documents at onceYes Partial
One-click glossary of jargon & acronymsYesNo
Free tier (no card)YesNo
Edit, sign, redact & organize PDF files themselvesNoYes
Desktop app & deep PDF toolingNoYes

Last reviewed: 3 July 2026.

Two rows go to Acrobat, and we're not pretending otherwise; see Where Acrobat is the better tool below. The exact-passage citations and cross-document Collections are where Sidenote pulls ahead.

The core difference

A PDF feature inside one app, or a reader for the whole browser.

Acrobat's AI Assistant is a feature inside Acrobat, a paid add-on on top of the PDF tool you already use. Open a PDF in Acrobat and it can summarize it and answer questions. It does that job well, but it lives where your PDFs live: inside Acrobat.

Sidenote isn't tied to one file type or one app. It sits in the side panel of every tab, reads what you already have open (a PDF, a Confluence runbook, a Notion doc, a Google Doc, a web article) and answers in place. Click a citation and it scrolls the real document and highlights the exact passage.

The difference in one example

Take a private Confluence runbook and a research PDF you need to read together. Acrobat's assistant works on the PDF once it's open in Acrobat; the live wiki page never becomes a PDF there. Sidenote reads both in the browser, on your session, and lets you ask across them at once.

Giving credit

Where Acrobat is the better tool.

If these are what you need, Acrobat (with or without the AI Assistant) is the right home:

Editing & organizing PDF files

Edit text, reorder pages, merge, split, compress and export. Acrobat is the industry standard for working on the PDF file itself; Sidenote only reads.

Signing, forms & redaction

E-signatures, fillable forms and permanent redaction are core Acrobat features. Sidenote doesn't change documents: it reads and cites them.

Deep PDF tooling & desktop app

A mature desktop application with comparison, accessibility and pre-press tools. Sidenote is a focused desktop browser extension for reading.

FAQ

Sidenote vs Acrobat AI Assistant: common questions

If your reading lives entirely inside Acrobat as PDF files you've already opened there, the AI Assistant is convenient. But if you read across PDFs and the wider web (Confluence runbooks, Notion docs, SharePoint pages, Google Docs, arXiv papers, articles), Sidenote is the better fit: it works in your browser and cites the exact passage, rather than only working on PDFs inside Acrobat.
Yes. The AI Assistant is a paid add-on layered on top of Acrobat or Reader, billed separately from your existing Acrobat subscription. Sidenote has a free tier for everyday summaries, explanations and glossaries, an opt-in 7-day Pro trial that needs no card, and paid plans from £10/month. Always check Adobe's pricing page for current figures.
Not as web pages. Acrobat's AI Assistant works on documents you've opened inside Acrobat or Reader, chiefly PDFs. A live page behind your company login isn't a PDF file in Acrobat, so it's out of reach. Sidenote runs inside your browser on your own session, so it reads what's on your screen, including private wikis and intranet pages.
Yes. Open a scanned or image-only PDF in your browser and Sidenote OCRs it first, so even documents with no text layer become searchable and citable. Acrobat can OCR PDFs too, but you generally run that step inside Acrobat before the AI Assistant can use the text.
Both surface sources. Sidenote adds two things: every answer is checked server-side against the passages actually retrieved, so unsupported claims have their citation dropped before you see them; and clicking a citation scrolls the document to the exact sentence and highlights it, so verifying takes a second.
Absolutely. Acrobat is the better home for editing, signing, redacting and organizing PDF files themselves. Plenty of people keep Acrobat for managing PDFs and use Sidenote to read and question everything across the browser. They overlap, but they're not the same shape of tool.
Try it on the page you're on

Read anything. With citations.

Add Sidenote to your browser and ask the document in front of you a question, PDF or not. No Acrobat, no upload, no new tab. Just the answer, and the passage that proves it.

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7-day Pro trial · No card required · Free plan forever