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Utilities · head to head

Transmission vs TreeSize

Transmission logo

Transmission

Utilities

Free open source BitTorrent client known for a minimal interface and low resource use

From
Free
Rated
-
Full reviewWebsite
TreeSize logo

TreeSize

Utilities

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

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Transmission it has no built in search tab, so finding torrents means using a separate browser tab or search engine, unlike qBittorrent.; TreeSize it traverses directories rather than reading the NTFS master file table, so a local drive scan takes noticeably longer than the fastest alternatives.
  • They diverge on capability: Transmission covers Minimal interface, TreeSize covers Free edition licensed for business.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Transmission and TreeSize actually diverge.

Attributes where Transmission and TreeSize differ
AttributeTransmissionTreeSize
Pricing modelOpen source, no licence feequote
PlatformsMac, Windows, LinuxWindows

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 Transmission

  • Minimal interface
  • transmission-daemon
  • Built in web UI
  • Low resource use
  • Bandwidth limits and scheduling
  • Wide platform and firmware support

Only in TreeSize

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

What people use each for

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

Transmission

  • A user running torrents on a NAS, Raspberry Pi or router firmware where every bit of CPU and memory mattersnot TreeSize
  • Someone who wants the simplest possible torrent interface with no extra tabs or configuration to learnnot TreeSize
  • A user who wants headless remote operation without installing a separate web UI packagenot TreeSize
  • Anyone replacing a heavier client because Transmission uses noticeably less resource for the same workloadnot TreeSize

TreeSize

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

Where each one falls short

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

Transmission

  • It has no built in search tab, so finding torrents means using a separate browser tab or search engine, unlike qBittorrent.
  • Its remote and thin-client capabilities, while functional through the web UI, are less complete than Deluge purpose-built daemon and thin-client separation.
  • The interface deliberately omits advanced features such as RSS automation that qBittorrent includes, so power users may find it too basic.
  • As with any torrent client, legal use depends entirely on the content being downloaded, which the app does not moderate.
  • Development pace has historically been slower than qBittorrent, with fewer new features added per year.

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.

Pricing, plan by plan

Transmission

Free
  • TransmissionFree
    • Free and open source, no account needed
    • transmission-daemon with built in web UI
    • Low resource use on modest hardware

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

Which should you pick?

Choose Transmission if

  • You need minimal interface.
  • You want to start without paying.
  • You work on Mac, Windows, Linux.
  • You also want transmission-daemon.
Transmission review

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

Questions people ask

Is Transmission or TreeSize better?
Neither clearly leads. Transmission starts at Free and TreeSize at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Transmission or TreeSize?
Transmission starts at Free and TreeSize at Free.
Does Transmission or TreeSize run on more platforms?
Transmission runs on Mac, Windows, Linux. TreeSize runs on Windows.
Can I use Transmission for free?
Both have a free tier, so you can try either at no cost before committing.
What is Transmission best used for?
Transmission is most often used for a user running torrents on a nas, raspberry pi or router firmware where every bit of cpu and memory matters, someone who wants the simplest possible torrent interface with no extra tabs or configuration to learn, a user who wants headless remote operation without installing a separate web ui package, anyone replacing a heavier client because transmission uses noticeably less resource for the same workload. Of those, a user running torrents on a nas, raspberry pi or router firmware where every bit of cpu and memory matters and someone who wants the simplest possible torrent interface with no extra tabs or configuration to learn are not what TreeSize is typically brought in for.
What can Transmission do that TreeSize cannot?
Transmission covers Minimal interface, transmission-daemon, Built in web UI, Low resource use. TreeSize covers Free edition licensed for business, Network share scanning, Reports by age and owner, Duplicate file search.

Answered from the vendors’ own pages

Transmission: Is Transmission free?

Yes, entirely, and it is open source with no paid tier or ads.

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.

Transmission: Why is Transmission popular on NAS devices?

Because it runs as a lightweight daemon with low CPU and memory use and a built in web UI, which suits always-on, low powered hardware.

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.

Transmission: Does Transmission have search built in?

No. Unlike qBittorrent, finding torrents requires a separate search tool outside the app.

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.

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.

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