Softonic covered Adobe Acrobat Studio’s new PDF Spaces feature this week, framing the email attachment’s slow retirement in favour of a shared workspace for PDFs. That is the direction the whole category moved in 2026. PDF apps used to be about one person editing one file. The 2026 crop treats a PDF as a shared workspace with comments, tasks, live cursors, and version history. We tested the seven best apps for PDF collaboration workspaces on desktop, so you can pick one whether you are on Acrobat, considering leaving it, or looking for a free alternative.
Every pick here runs on Windows and macOS at minimum. Most add Linux via a browser client or Wine. All handle multiple reviewers on the same PDF at the same time. We flag which ones ship real-time collaboration (like a Google Doc) versus asynchronous comment queues.
What to look for in a PDF collaboration app
- Real-time presence. Live cursors and comment indicators change the experience from “email chain” to “shared workspace”.
- Comment threading and resolve. Comments that live forever without a resolve state turn into noise fast.
- Version history. When a legal or design PDF goes through five rounds, the ability to walk backward matters.
- Permissions. Full edit, comment-only, view-only, and share-by-link ideally exist as separate levels.
- Format fidelity. The final export has to look identical to the source PDF, not a “close enough” reflow.
Quick comparison
| App | Best for | Free tier | Real-time collab | Standout feature |
|---|---|---|---|---|
| Adobe Acrobat Studio | Full Adobe stack, PDF Spaces | Reader free | Yes | PDF Spaces workspaces |
| Nitro PDF Pro | Adobe alternative with cloud collab | Trial | Yes | Cloud sign and share |
| Foxit PDF Editor | Enterprise-grade collaboration | Trial | Yes | Connected review with SharePoint |
| Kami | Education and classroom PDFs | Yes | Yes | Google Classroom and LMS integrations |
| Xodo | Free with strong browser story | Yes | Yes | Full Web and mobile stack |
| PDFgear | Free desktop with AI features | Yes | Async | Zero-cost polished desktop client |
| ONLYOFFICE Docs | Self-hosted, open-source stack | Yes | Yes | Runs on your own server |
The 7 best PDF collaboration workspace apps for desktop
1. Adobe Acrobat Studio, the reference with PDF Spaces
Adobe Acrobat Studio is the current-year Acrobat flavour that adds PDF Spaces, a workspace concept that gathers a PDF, its comments, its tasks, and shared views into a single URL. On desktop, Acrobat Studio Pro handles editing, review, and signing. On the workspace side, PDF Spaces makes async review feel closer to a shared doc than an emailed file.
Where it falls short: Subscription-only, and Acrobat’s pricing scales sharply for teams. Real-time editing still trails a native cloud doc.
Pricing:
- Reader: free
- Paid: Acrobat Studio subscription starting around $23 per month for individuals
Platforms: Windows, macOS, Web.
Download: adobe.com/acrobat/acrobat-studio
Bottom line: The pick when the client insists on Adobe, or when the workflow already lives in Creative Cloud.
2. Nitro PDF Pro, the Adobe alternative with collaboration built in
Nitro PDF Pro is the mature Acrobat alternative that added a cloud collaboration tier on top of its desktop editor. Multi-reviewer PDF review, integrated e-signature, and a portal for shared review live in the Nitro Cloud tier. The desktop client keeps the “familiar Acrobat” feel that makes migration low-friction.
Where it falls short: Cloud collaboration lives behind the paid tier. Some enterprise features (redaction workflows) are less mature than Adobe’s.
Pricing:
- Free trial
- Paid: from around $12 per user per month
Platforms: Windows, macOS, Web.
Download: gonitro.com
Bottom line: The pick when you want to leave Adobe but keep the workflow shape roughly the same.
3. Foxit PDF Editor, enterprise-grade with connected review
Foxit PDF Editor targets enterprises directly. Its “Connected Review” ties the PDF review workflow to SharePoint, OneDrive, or Foxit’s own cloud, so comment histories persist across the whole document lifecycle. Foxit’s PDF engine is fast, the client is lighter than Acrobat, and the enterprise licensing model is closer to what large teams expect.
Where it falls short: The consumer version has fewer collab features than the enterprise SKU. UI density is higher than Acrobat.
Pricing:
- Free trial
- Paid: from around $9 per user per month
Platforms: Windows, macOS, Linux.
Download: foxit.com
Bottom line: The pick for enterprises with SharePoint at the centre of the workflow.
4. Kami, PDF workspaces for classrooms
Kami started as a Chromebook PDF app and grew into a full document workspace tuned for schools. Real-time annotation, class-wide comment threads, and integration with Google Classroom, Canvas, and Schoology make it the pick when the “collaborators” are 30 students on the same worksheet. Teachers can assign, review, and grade in the same window.
Where it falls short: Not designed for corporate document workflows. Advanced PDF editing (redaction, form fields) trails the professional tools.
Pricing:
- Free: individual educator use
- Paid: school and district licences
Platforms: Web (any desktop OS), Chrome, mobile.
Download: kamiapp.com
Bottom line: The pick for classroom PDF workflows. Not the right tool for a legal review.
5. Xodo, free with a strong browser and mobile story
Xodo by Apryse has a full browser-based PDF editor, real-time collaboration with live cursors, comment threads, and free personal use. On desktop, it runs in any browser with no install, and the mobile apps sync the same session. The 2026 revamp added a Word-like presence indicator that shows who is currently viewing a shared PDF.
Where it falls short: Some advanced features require an account. Enterprise features are metered.
Pricing:
- Free: personal use
- Paid: from around $8 per user per month for team features
Platforms: Web, plus mobile apps that sync sessions.
Download: xodo.com
Bottom line: The pick when the collaborators use different OSes and the browser is the common denominator.
6. PDFgear, the polished free desktop client
PDFgear is the desktop PDF editor that surprises people by being both free and complete. Edit, annotate, sign, split, merge, and use an AI chat that answers questions about the document, all without an account. Collaboration is async, over shared links, but the desktop editor experience is closer to Acrobat’s than any other free tool.
Where it falls short: No real-time collaboration in the same document. Corporate teams may want an SSO story that PDFgear does not have.
Pricing: Free.
Platforms: Windows, macOS, iOS, web.
Download: pdfgear.com
Bottom line: The pick when you want a full editor with zero cost and are fine with async collab.
7. ONLYOFFICE Docs, self-hosted and open-source
ONLYOFFICE Docs is the self-hosted collaborative editor stack that also handles PDFs. Deploy on a Linux server (or as a Docker image), point clients at it, and get Google-Docs-style live editing with the added property of the entire stack running on your infrastructure. PDF editing is a first-class mode, not a bolt-on.
Where it falls short: Server operations required. The polish of the hosted commercial competitors is closer, not identical.
Pricing:
- Free: Community Edition
- Paid: from a per-user tier for enterprise features
Platforms: Linux server; desktop editor for Windows, macOS, Linux; web UI everywhere.
Download: onlyoffice.com/office-suite.aspx · GitHub
Bottom line: The pick for teams that want the whole PDF workspace on their own servers.
How to pick the right one
- If the workflow already lives in Adobe: Acrobat Studio with PDF Spaces.
- If you want to leave Adobe but keep the familiar shape: Nitro PDF Pro.
- If SharePoint is at the centre of your work: Foxit PDF Editor with Connected Review.
- If the collaborators are students: Kami.
- If the collaborators run different OSes and everyone lives in a browser: Xodo.
- If you want the best free desktop PDF editor and can live with async collab: PDFgear.
- If your organisation requires data to stay on your servers: ONLYOFFICE Docs.
PDF Spaces are still the newest primitive in this category. Give any tool six months of your team’s actual workflow before deciding whether the workspace concept fits or whether async review was the right shape all along.
FAQ
What is a PDF collaboration workspace? A shared surface that holds a PDF, its comments, tasks, and version history. Reviewers can work in parallel with live presence, instead of emailing a copy back and forth.
Which app is closest to Google Docs for PDFs? Xodo and ONLYOFFICE Docs both offer live cursors, comment threads, and simultaneous editing on the same file.
Is there a free PDF collaboration app for desktop? PDFgear is the strongest free desktop editor. Xodo’s free personal tier covers browser collaboration. ONLYOFFICE Docs Community Edition covers the self-hosted case.
Do I need Acrobat Studio if I already have Acrobat Pro? PDF Spaces is the workspace addition in Studio. If your workflow already uses shared Reviews in Acrobat Pro DC, Studio adds convenience rather than new capability.
Which PDF tool works best for a school setting? Kami is designed for classrooms and integrates with Google Classroom, Canvas, and Schoology. For teacher-only workflows without an LMS, Xodo or PDFgear also work well.
