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Utilities · head to head

AutoHotkey vs TreeSize

AutoHotkey logo

AutoHotkey

Utilities

Windows scripting language for hotkeys, text expansion and desktop automation

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: AutoHotkey version 2 is a different language rather than a new release, so v1 scripts must be rewritten and the conversion script handles only routine cases, leaving years of accumulated internal automation stranded.; 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: AutoHotkey covers Hotkeys and hotstrings, TreeSize covers Free edition licensed for business.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which AutoHotkey and TreeSize actually diverge.

Attributes where AutoHotkey and TreeSize differ
AttributeAutoHotkeyTreeSize
Pricing modelOpen source, no licence feequote

Identical on both: starting price (Free), free tier (Yes), platforms (Windows), 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 AutoHotkey

  • Hotkeys and hotstrings
  • Synthetic input
  • Window and control access
  • COM and DLL calls
  • Built-in GUI toolkit
  • Script compilation

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.

AutoHotkey

  • Remapping keyboard layouts or adding shortcuts to software that offers nonenot TreeSize
  • Automating repetitive data entry in a legacy application with no API or command linenot TreeSize
  • Standardising clinical, legal or insurance text snippets across a team through hotstringsnot TreeSize
  • Driving a vendor application through its interface as part of a nightly unattended processnot TreeSize

TreeSize

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

Where each one falls short

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

AutoHotkey

  • Version 2 is a different language rather than a new release, so v1 scripts must be rewritten and the conversion script handles only routine cases, leaving years of accumulated internal automation stranded.
  • Version 1.1 receives no active development, so teams that decline the rewrite are running an interpreter that will not get fixes for future Windows changes.
  • Antivirus and EDR products frequently quarantine the interpreter and compiled scripts because the same capabilities are used by keyloggers, which turns deployment into a security exception request.
  • Automation depends on window titles, control classes and screen positions, so a vendor application update can break every script overnight with no compile-time warning.
  • It is Windows only with no path to macOS or Linux, so any process automated with it cannot follow the organisation if it moves platforms.

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

AutoHotkey

Free
  • AutoHotkeyFree
    • GPLv2 licence with no paid edition
    • v2 and legacy v1.1 branches both downloadable
    • Script compiler included

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 AutoHotkey if

  • You need hotkeys and hotstrings.
  • You want to start without paying.
  • You work on Windows.
  • You also want synthetic input.
AutoHotkey 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 AutoHotkey or TreeSize better?
Neither clearly leads. AutoHotkey 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, AutoHotkey or TreeSize?
AutoHotkey starts at Free and TreeSize at Free.
Does AutoHotkey or TreeSize run on more platforms?
Both run on Windows, so platform support will not decide this one for you.
Can I use AutoHotkey for free?
Both have a free tier, so you can try either at no cost before committing.
What is AutoHotkey best used for?
AutoHotkey is most often used for remapping keyboard layouts or adding shortcuts to software that offers none, automating repetitive data entry in a legacy application with no api or command line, standardising clinical, legal or insurance text snippets across a team through hotstrings, driving a vendor application through its interface as part of a nightly unattended process. Of those, remapping keyboard layouts or adding shortcuts to software that offers none and automating repetitive data entry in a legacy application with no api or command line are not what TreeSize is typically brought in for.
What can AutoHotkey do that TreeSize cannot?
AutoHotkey covers Hotkeys and hotstrings, Synthetic input, Window and control access, COM and DLL calls. TreeSize covers Free edition licensed for business, Network share scanning, Reports by age and owner, Duplicate file search.

Answered from the vendors’ own pages

AutoHotkey: Should a new project start on v1 or v2?

Version 2. Version 1.1 is not actively developed and every new script written against it adds to a future rewrite.

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.

AutoHotkey: Will compiled scripts trigger antivirus?

Often yes. Compiled AutoHotkey executables are a known malware pattern and usually need to be allowlisted by hash or signed with your own certificate.

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.

AutoHotkey: Can it automate a web application?

It can drive a browser as a user would, but it has no page object model, so a CSS change breaks it. Use a browser automation framework where one is available.

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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