Virtual data room providers for large files
Jul 7 – Oct 25, 2026Updated Oct 25, 2026
Reviewed by Dimitry Apollonsky
Which brands AI mentions
Mentioned in
ChatGPTChatGPTGoogle AI ModeGoogle AI Mode
Widest split: Peony, 17% on ChatGPT and 68% on Google AI Mode.
- #1tiedFirmexChatGPT 96%Google AI Mode 77%
- #1tiediDeals VDRChatGPT 91%Google AI Mode 82%
- #3tiedDatasiteChatGPT 87%Google AI Mode 59%
- #3tiedIntralinksChatGPT 91%Google AI Mode 41%
- #5tiedPeonyChatGPT 17%Google AI Mode 68%
Questions and answers
ChatGPTOct 25, 2026
For virtual data rooms (VDRs) handling large CAD drawings, BIM-related files, engineering plans, high-resolution imagery, and video, I would shortlist Intralinks, iDeals, and Firmex first, then evaluate specialist large-file platforms if upload speed and media playback matter more than traditional M&A diligence controls.
The key distinction is that supporting a file upload is not the same as previewing it reliably in a browser. For CAD, you need to verify which formats render, whether 3D models retain their functionality, and whether large files can be uploaded without timing out.
Recommended VDR providers
1. Intralinks VDRPro
Best for CAD-aware enterprise diligence
Intralinks explicitly supports browser viewing of DWG, DWF, DXF and DGN CAD files, along with MP4, OGG and WEBM video. However, CAD files are rendered as PDFs, so 3D animations are not preserved. Its recommended individual file size is 25 GB in US-hosted rooms and 15 GB in some other regions.
Watch out: Confirm the file-size limit for your hosting region and whether the CAD preview meets your needs.
2. Firmex
Best documented large-file upload capacity
Firmex reports in-browser uploads of up to 50 GB per file, without requiring separate desktop software. It also increased its single-file download limit to 20 GB. These are useful capabilities for large engineering and multimedia packages.
Watch out: The published upload limit does not establish how well native CAD files or large videos preview in the browser. Test those separately.
3. iDeals
Best to evaluate for general-purpose deal diligence
iDeals is worth including in a shortlist for secure document management, permissions, audit trails and collaboration. Its comparison guide lists DWG support, making it a relevant CAD candidate.
Watch out: I could not verify a comparable current maximum upload size or native 3D preview capability from the sources reviewed. Request confirmation for your specific formats.
4. Datasite
Best to consider for complex, large-scale M&A
Datasite is a strong candidate when the room must handle extensive due diligence, multiple bidders and tightly controlled access. It is a major enterprise VDR option, but the research here did not establish a specific large-file preview advantage over the other candidates.
Watch out: Ask for a live demonstration with your actual CAD and media files before choosing it on performance grounds.
Comparison at a glance
Provider Large-file evidence CAD / media preview evidence My take Intralinks Recommended 15–25 GB individual files, depending on region Explicit CAD and video formats Strongest documented format support Firmex Up to 50 GB in-browser upload Needs validation Strong upload-capacity candidate iDeals Current maximum not verified DWG support listed in comparison Worth a hands-on test Datasite Specific maximum not verified here Needs validation Enterprise diligence candidate These are evidence-based shortlist recommendations, not measured speed rankings. Actual upload speed depends on network conditions, file size, server location and the upload implementation.
What about very large video and 3D files?
If you are working with 100 GB+ video assets, drone imagery, BIM models or massive engineering datasets, a conventional VDR may not be the best tool for moving and previewing the files. Consider specialist platforms alongside a VDR:
- Box — evaluate for large-file storage, sharing and preview workflows.
- LucidLink — evaluate for streaming access to large creative files without downloading everything first.
- MASV — evaluate for transferring very large video and media packages.
These are adjacent alternatives, not verified replacements for a secure transaction room with full VDR permissions, audit trails and diligence workflows.
How I'd test the finalists
Before signing a contract, ask each vendor to demonstrate the same test set:
- Upload: A 10 GB file, a 25 GB file and your largest expected file, using the same network.
- CAD: Open representative DWG, DXF and, if relevant, RVT, IFC or STEP files. Check layer visibility, zoom, measurement, 3D rotation and animations.
- Multimedia: Preview a large MP4 from beginning to end, including seeking to different timestamps.
- Reliability: Interrupt and resume an upload, then repeat the preview test in another browser and on a second connection.
- Security: Confirm that previews respect download restrictions, watermarking, permissions and audit logging.
A PDF rendering of a CAD file may be adequate for reviewing drawings, but it is not equivalent to an interactive engineering model.
My recommendation
Start with Intralinks for verified CAD/video format support and Firmex for its documented 50 GB upload capacity. Add iDeals as a third bidder, and include Datasite if the transaction is complex enough to warrant an enterprise-focused platform.
One question would help me narrow this down: What is the largest individual file you need to upload, and which formats matter most?
Largest individual file
Under 5 GB
5–25 GB
25–100 GB
Over 100 GB
Primary file types
CAD / BIM (DWG, RVT, IFC, STEP)
Video / multimedia
Both CAD and multimedia
Other large technical files
Main priority
Fast uploads
Reliable browser previews
Both
Secure M&A diligence and audit trails
[Refine recommendations]
Sources cited in this answer15
- support.intralinks.comViewing documents
- support.intralinks.comPerformance guidelines and best practices
- intralinks.comSS&C Intralinks | AI M&A & Dealmaking Solutions Provider
- support.intralinks.comViewing documents
- firmex.comOur Biggest Upload Capacity Upgrade Ever | Firmex VDR
- firmex.comSimplified data rooms for complex projects
Google AI ModeOct 25, 2026
Standard enterprise VDRs(like Datasite, Intralinks, or Firmex) are optimized for text-heavy legal/financial PDFs and frequently choke, throttle, or trigger massive overage fees when handling gigabyte-scale CAD assemblies (SOLIDWORKS, CATIA, Revit) or high-definition multimedia files.When looking for platforms that handle massive files without crashing, breaking folder trees, or imposing steep per-GB or per-page penalties, a few specialized options stand out:
- Peony Data RoomPeony Data Room is purpose-built for heavy engineering, manufacturing, architecture, and media diligence. It natively accepts large archives and complex files (like multi-gigabyte SOLIDWORKS, Inventor, CATIA, NX, BIM models, and 4K video walk-throughs) with flat-rate pricing rather than punitive per-GB or per-page charges. It maintains complete folder structures and drawing trees while retaining enterprise security controls like NDA gates and dynamic watermarks.
- ShareVaultShareVault is a mainstream enterprise provider known for high-performance handling of complex documents and media. It features a built-in secure A/V player capable of streaming high-definition media files (up to 4K) directly inside the browser with DRM protection and video watermarking. However, for multi-gigabyte native CAD files, you'll want to verify storage limits on your specific tier to avoid data-cap overages.
- iDeals VDRiDeals VDR offers robust drag-and-drop processing, high uptime, and reliable document rendering for heavy data loads. While traditional tiers cap free storage and may charge extra for heavy multimedia or expansive document sets, iDeals handles large file capacities smoothly and provides enterprise-grade tracking and granular permission controls suited for technical asset sales.
To help narrow down the right provider, tell me:
- What is the average and maximum file size of your CAD or multimedia assets?
- Do you need flat-rate pricing with unlimited storage, or an enterprise-tier traditional M&A room?
Sources cited in this answer5
- peony.inkLarge-File Data Room — 20GB+ Uploads Without Per-GB Surprises — Peony
- doxis.com7 Best Virtual Data Room Software for Enterprises (2026) - Doxis
- peony.inkManufacturing Data Rooms — Secure CAD, BOM, and Factory Video Sharing for Hardware M&A — Peony
- peony.inkI Tested 10 Data Rooms for Large Files (With NDA Gates) in 2026 — Peony
- sharevault.comShareVault: VDR Features for Secure Document Management
Google AI ModeOct 15, 2026
When you are dealing with massive CAD assemblies (SolidWorks, .DWG, CATIA, STEP) and heavy media files (high-res video, 3D renderings), traditional VDRs often choke on upload limits, lag during browser rendering, or force users into sluggish third-party downloads.
Top virtual data room options optimized for heavy file handling, fast throughput, and reliable document or media previews include:
- Peony Data Room : Specifically built for hardware, engineering, and media-heavy due diligence, handling massive files (20GB to 80GB+ CAD, BIM models, and video streams) without per-GB pricing penalties . It features native in-browser streaming for media with dynamic waterframing, and handles formats like SolidWorks, AutoCAD .DWG, and Revit without forced file-splitting. You can explore their capabilities on the Peony Large-File Data Room.
- iDeals VDR : Highly regarded for a smooth, user-friendly interface that handles a diverse range of complex documents and large media formats. It provides robust upload speeds via drag-and-drop or bulk tools, stable performance under high file volumes, and clean document management. Learn more about their infrastructure on the iDeals Virtual Data Rooms site.
- ShareVault : Known for life sciences and engineering tech sharing, offering high-speed bulk uploads and granular tracking. While native browser previews for complex 3D CAD can sometimes require downloading or a secured viewer depending on the file complexity, its strict security controls and high-capacity architecture make it a reliable enterprise choice. Check details at ShareVault.
- Firmex : A veteran transaction VDR built for processing large, bulk volumes of technical documents quickly . While it prioritizes security and high-speed indexing over flashy media streaming, it handles heavy data loads reliably when you need strict permissioning on proprietary designs. Review their features via Firmex .
To help narrow down the ideal platform, could you share:
- Average file sizes you are working with (e.g., under 1GB vs. 20GB+ assemblies)
- Whether you need in-browser interactive 3D CAD rotation/viewing or just secure downloads/static previews
ChatGPTOct 15, 2026
For your use case, I’d prioritize virtual data rooms with proven large-file upload support and native CAD/media previews, rather than choosing a standard M&A data room based on security features alone.
The key distinction is that a platform may accept a 20–50 GB file but still struggle to render it in a browser. Upload limits, transfer speed, and preview reliability are three separate things.
Based on the available product documentation, these are the strongest candidates to evaluate first.
My shortlist
1. Ideals Vault
(Best overall starting point)
Supports uploads up to 50 GB per file on Vault and up to 500 GB on Vault Max. It advertises DWG support, extensive video-format support, browser-based viewing, and desktop upload/sync.
- Best for: Mixed CAD drawings, engineering documents, and media assets.
- Watch out: The documented online DWG preview limit is 50 MB. Large CAD files may upload successfully without being previewable.
2. Egnyte
Best for engineering-heavy workflows.
Egnyte offers specialized BIM/CAD previews and desktop and edge caching to reduce delays when working with large files. Its documented preview limits include DWG up to 150 MB, IFC and RVT up to 400 MB, and OBJ up to 400 MB. The specialized file handler is an add-on.
- Best for: CAD/BIM teams that repeatedly work with large project files.
- Watch out: It is primarily a content collaboration platform, not a traditional transaction-focused VDR. Confirm the governance and deal-room features your workflow requires.
Official CAD/BIM preview documentation
3. Firmex
Best for straightforward, high-volume uploads.
Firmex supports browser-based drag-and-drop uploads of individual files up to 50 GB, with access controls, watermarks, and audit reporting.
- Best for: Secure due diligence and sharing large collections of project files.
- Watch out: I couldn't verify comparable native preview limits for large CAD models or advanced video playback from the documentation reviewed.
4. Intralinks VDRPro
Best for enterprise deal rooms with CAD and video viewing.
Its documentation confirms browser previews for DWG, DWF, DXF and DGN, along with MP4, OGG and WEBM video. CAD drawings are converted to PDF for preview, so 3D animations aren't available in the viewer.
- Best for: Real estate, infrastructure, and enterprise transactions.
- Watch out: I couldn't verify a comparable maximum upload size or a guaranteed preview-processing time.
How they compare against your requirements
Platform Large-file uploads CAD previews Media previews Ideals Vault Up to 50 GB; 500 GB on Vault Max DWG; 50 MB online-viewing limit Broad video-format support Egnyte Designed for large-file collaboration Stronger documented BIM/CAD support General media previews Firmex Up to 50 GB Confirm exact formats and limits Confirm exact formats and limits Intralinks VDRPro Confirm maximums with sales DWG, DWF, DXF, DGN MP4, OGG, WEBM Sources:
My recommendation: Start by testing Ideals Vault and Egnyte side by side. Ideals is the more natural starting point for a secure VDR that also handles media; Egnyte is worth serious consideration if CAD/BIM performance is the main bottleneck. None of the published specifications alone proves that uploads or previews will be fast on your network.
Three things I'd test before signing a contract
- Upload throughput: Upload a representative 10–50 GB file and a batch of hundreds of smaller files. Measure actual elapsed time, not a vendor's advertised best-case speed.
- Preview reliability: Test your actual CAD formats, including referenced files and complex assemblies, plus your largest video files. Check whether previews work on the first attempt and how long processing takes.
- Viewer experience: Confirm zooming, panning, page navigation, video seeking, and access from external reviewers' browsers. Determine which formats require downloading or desktop software.
One question to narrow this down
What kind of CAD files are you dealing with most often?
1. Primary file types
AutoCAD DWG/DXF drawings
Revit/IFC and 3D BIM models
A mix of CAD/BIM and media
3D models, animation and video-heavy projects
2. Typical largest individual file
Under 1 GB
1–10 GB
10–50 GB
Over 50 GB
3. Which matters more?
Fast uploads
Reliable in-browser previews
Both equally
[Refine recommendations]
Sources cited in this answer10
- vault.idealsvdr.comSecure collaborative file sharing | Ideals Vault
- helpcenter.idealsvdr.comSupported file types for online viewing | Ideals Help Center
- helpdesk.egnyte.comPreview BIM Files in Egnyte – Egnyte
- firmex.comVirtual Data Room Solution | Firmex Virtual Data Room
- support.intralinks.comPreviewing documents and video files | VDRPro – Intralinks
- pages.egnyte.comThis document explores some of these unique challenges and explains how Egnyte handles them. The primary example used here is AutoCAD, but much of the functionality described also applies to other applications from Autodesk, Adobe, Bentley, and more.
Also asked as
- Which VDRs are best for uploading large multimedia or CAD files quickly and viewing them without errors?
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