Is TreeSize or Ventoy better?

Neither clearly leads. TreeSize starts at Free and Ventoy at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, TreeSize or Ventoy?

TreeSize starts at Free and Ventoy at Free.

Does TreeSize or Ventoy run on more platforms?

TreeSize runs on Windows. Ventoy runs on Windows, Linux.

Can I use TreeSize for free?

Both have a free tier, so you can try either at no cost before committing.

What is TreeSize best used for?

TreeSize is most often used for deploying one free disk analyser across a company without a personal-use licence problem, reporting on a file server by owner and file age before an archiving or quota decision, finding duplicate files spread across departmental network shares, producing a storage report for someone who will read a pdf but not run a scan. Of those, deploying one free disk analyser across a company without a personal-use licence problem and reporting on a file server by owner and file age before an archiving or quota decision are not what Ventoy is typically brought in for.

What can TreeSize do that Ventoy cannot?

TreeSize covers Free edition licensed for business, Network share scanning, Reports by age and owner, Duplicate file search. Ventoy covers In-place ISO boot, Persistent overlays, Plugin configuration, Secure Boot support.

Utilities · head to head

TreeSize vs Ventoy

TreeSize

Utilities

Windows disk space analyser whose free edition may be used commercially, with paid tiers for scheduled reporting

From: Free
Rated: -

Full review Website

Ventoy

Utilities

Multiboot USB creator that boots ISO files copied onto an ordinary partition

From: Free
Rated: -

Full review Website

The short version

Each has a real cost: TreeSize it traverses directories rather than reading the NTFS master file table, so a local drive scan takes noticeably longer than the fastest alternatives.; Ventoy the repository ships prebuilt binaries that are difficult to reproduce from source, so several Linux distributions refuse to package it and security teams in regulated organisations will usually reject it.
They diverge on capability: TreeSize covers Free edition licensed for business, Ventoy covers In-place ISO boot.
Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which TreeSize and Ventoy actually diverge.

Attributes where TreeSize and Ventoy differ
Attribute	TreeSize	Ventoy
Pricing model	quote	Open source, no licence fee
Platforms	Windows	Windows, Linux

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Utilities).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in TreeSize

Free edition licensed for business
Network share scanning
Reports by age and owner
Duplicate file search
Scheduled scans
Exports

Only in Ventoy

In-place ISO boot
Persistent overlays
Plugin configuration
Secure Boot support
Multi-format boot
Non-destructive install

What people use each for

The jobs each tool is most often brought in to do.

TreeSize

Deploying one free disk analyser across a company without a personal-use licence problemnot Ventoy
Reporting on a file server by owner and file age before an archiving or quota decisionnot Ventoy
Finding duplicate files spread across departmental network sharesnot Ventoy
Producing a storage report for someone who will read a PDF but not run a scannot Ventoy

Ventoy

Field technicians who need one stick carrying several Windows and Linux installers plus a rescue environmentnot TreeSize
Labs that reimage machines weekly and want to swap a single ISO rather than rewrite the drivenot TreeSize
Testing a new distribution release without destroying the existing set of imagesnot TreeSize
Unattended installation runs where answer files sit beside the ISOs on the same partitionnot TreeSize

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

TreeSize

It traverses directories rather than reading the NTFS master file table, so a local drive scan takes noticeably longer than the fastest alternatives.
It is Windows only, so file servers running Linux or a NAS appliance need a different tool or a share mounted from a Windows machine.
Useful features are spread across three paid tiers, so the single capability a buyer needs frequently sits two tiers above the one they were considering.
Scanning large network shares generates significant traffic and takes hours, which means it has to be scheduled rather than run when someone asks the question.
Pricing is per licence with separate maintenance, so an accurate total for a team requires a quote rather than a figure from the website.

Ventoy

The repository ships prebuilt binaries that are difficult to reproduce from source, so several Linux distributions refuse to package it and security teams in regulated organisations will usually reject it.
Development depends on one maintainer, so a period of inactivity leaves compatibility fixes for new distribution releases unaddressed with no second party able to cut a release.
Secure Boot works only after enrolling the Ventoy certificate through MokManager at the machine, which is a manual step at every device and is blocked outright on locked-down corporate firmware.
A small number of images still fail to boot in place and need workarounds, so a technician can discover mid-job that the one ISO they need is the one that does not work.
The data partition is exFAT by default, which means no file permissions and no journal, so a stick pulled during a copy can corrupt the whole image set rather than one file.

Pricing, plan by plan

TreeSize

Free

TreeSize FreeFree
- Folder size analysis and treemap
- Licensed for private and commercial use
- Basic exports
TreeSize Personal, Professional and Enterprise$undefined/year
- File search, duplicate detection and full exports
- Network share and file server scanning
- Scheduled unattended scans and stored reports

Ventoy

Free

VentoyFree
- Full feature set with no paid edition
- GPLv3 licence
- Windows and Linux installers

Which should you pick?

Choose TreeSize if

You need free edition licensed for business.
You want to start without paying.
You work on Windows.
You also want network share scanning.

TreeSize review

Choose Ventoy if

You need in-place iso boot.
You want to start without paying.
You work on Windows, Linux.
You also want persistent overlays.

Ventoy review

Questions people ask

Is TreeSize or Ventoy better?: Neither clearly leads. TreeSize starts at Free and Ventoy at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, TreeSize or Ventoy?: TreeSize starts at Free and Ventoy at Free.
Does TreeSize or Ventoy run on more platforms?: TreeSize runs on Windows. Ventoy runs on Windows, Linux.
Can I use TreeSize for free?: Both have a free tier, so you can try either at no cost before committing.
What is TreeSize best used for?: TreeSize is most often used for deploying one free disk analyser across a company without a personal-use licence problem, reporting on a file server by owner and file age before an archiving or quota decision, finding duplicate files spread across departmental network shares, producing a storage report for someone who will read a pdf but not run a scan. Of those, deploying one free disk analyser across a company without a personal-use licence problem and reporting on a file server by owner and file age before an archiving or quota decision are not what Ventoy is typically brought in for.
What can TreeSize do that Ventoy cannot?: TreeSize covers Free edition licensed for business, Network share scanning, Reports by age and owner, Duplicate file search. Ventoy covers In-place ISO boot, Persistent overlays, Plugin configuration, Secure Boot support.

Answered from the vendors’ own pages

TreeSize: Is TreeSize Free really free for business use?

Yes. JAM Software licenses the free edition for private and commercial use, which is the main reason it appears on corporate machines where other free analysers are not permitted.

Ventoy: Can I still use the USB stick for ordinary file storage?

Yes. The data partition mounts as normal removable storage and files that are not bootable images are simply ignored by the menu.

TreeSize: Why is it slower than WizTree?

Method. WizTree reads the NTFS master file table; TreeSize walks the directory tree, which is slower but works on network shares and non-NTFS volumes.

Ventoy: Do I need to reinstall Ventoy when a new distribution version comes out?

No. Delete the old ISO and copy the new one. You only rerun the installer to upgrade Ventoy itself.

TreeSize: Can it scan a NAS or Linux file server?

It scans them as network shares over SMB, with the speed penalty that implies. There is no agent that runs on the server itself.

Ventoy: Is it safe to use in a company that audits open source?

Often not. The unreproducible prebuilt binaries in the repository are a genuine audit finding and have blocked approval at organisations with supply chain review.

TreeSize: What does the Enterprise tier add?

Scheduled unattended scans, stored historical results and reporting across servers, which is the difference between a cleanup tool and a storage reporting system.

TreeSize vs Ventoy

TreeSize

Ventoy

The short version

Where they differ

What each one covers

Only in TreeSize

Only in Ventoy

What people use each for

TreeSize

Ventoy

Where each one falls short

TreeSize

Ventoy

Pricing, plan by plan

TreeSize

Ventoy

Which should you pick?

Choose TreeSize if

Choose Ventoy if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on TreeSize

More on Ventoy

Keep looking

Other head to heads