DaisyDisk vs CleanSpace, and why you might want both

DaisyDisk is a disk visualizer. You point it at a volume, it scans, and it draws a sunburst — concentric rings where every segment is a folder, sized by how much space it holds. Click a segment and you descend into it. It is fast, it is beautiful, and it has been the same focused tool for years.

CleanSpace is a cleaner. It also draws your disk, as a treemap in Space Lens, but the map is one of ten tools rather than the whole app.

People compare them because both show up when you search for a way to free space, and the comparison usually misses the actual difference: DaisyDisk shows you sizes, and CleanSpace makes a claim about safety. Everything else follows from that.

What DaisyDisk does better

Give it credit properly, because it earns it.

• It is faster and lighter. DaisyDisk does one thing and does not carry the machinery for anything else. Scans complete quickly and the interface stays fluid on a full drive.
• The sunburst is a better read than a treemap for hierarchy. A treemap packs rectangles by area, which is efficient but flattens depth. The rings keep the folder structure legible while you drill, and for the question why is this folder so big that reads better.
• It is $9.99 once. Not a subscription. Cheaper than any cleaner including ours.
• There is a sandboxed Mac App Store build. If you would rather not grant Full Disk Access to anything, that version exists, at the cost of not seeing everything.
• The collector is a good idea. You drag segments into a tray as you explore, review the pile, then delete it in one go. It makes you look at the list before committing, which is exactly the right shape for a delete.
• It has no opinions to be wrong about. DaisyDisk never tells you a file is junk, so it can never be wrong about that. It shows you what is there. You decide.

That last point is the whole trade, stated as a strength. It is also the limitation.

What DaisyDisk does not do

It does not know what any of those bytes are for. A 12 GB ~/Library/Developer/Xcode/DerivedData and a 12 GB folder of your own video look identical on the map: two big segments. Knowing that the first is regenerable build output and the second is irreplaceable is your job, and it is the entire job.

It also does not touch the categories that make up most of what people are trying to clear:

• Application leftovers. Deleting an app in Finder leaves support files, caches, containers, preferences and launch agents scattered under ~/Library. They are individually small, so they never appear as a large segment, and collectively they are gigabytes. See uninstalling apps completely.
• Login items and launch agents. No disk map shows you what starts at login, because that is not a size question. Here is how to audit them by hand.
• Purgeable space. macOS reports free space two different ways, and a disk map cannot resolve the gap. Purgeable space explained.
• Local Time Machine snapshots. These live outside the normal filesystem view. A map may not show them at all, and they are routinely tens of gigabytes.
• Duplicates. Two identical 4 GB files are two segments, and nothing marks them as the same file.
• Malware and adware persistence. Not a storage question, and not something DaisyDisk claims.

None of this is a criticism. DaisyDisk is not trying to do any of it, and an app that stays inside its scope is rarer than it should be.

What CleanSpace adds, and what it costs you

CleanSpace’s Space Lens is the same idea as the sunburst, rendered as a treemap, with drill-down and reveal in Finder over your home folder, Applications or the whole disk. Honestly assessed: it is a good map and DaisyDisk’s is a better one.

What the rest of the app adds is a maintained answer to is this safe to delete. Every path CleanSpace offers to remove has been classified in advance — user and system caches, logs, saved application state, Xcode derived data, package-manager caches, the Trash on every mounted volume, Mail attachments — and anything that is not on the recognized list is refused rather than offered. /System, /bin, /usr, keychains and security stores are refused outright. Documents, Desktop, Pictures, Movies and Music are never cleaned automatically. iCloud Drive, iOS backups, Messages, Mail’s database, Photos and Calendars are excluded even though they look cache-shaped.

Then the categories a map cannot see: an uninstaller that maps an app to every file it owns, a large-and-old list that combines size with last-opened date, a duplicate finder, a launch-item audit, a privacy pass over browser data, and maintenance tasks like thinning snapshots and freeing purgeable memory.

The cost of all that is scope. It is a bigger app doing more things, and more things means more surface where a rule could be wrong. DaisyDisk cannot delete the wrong file for you because it never chooses a file. CleanSpace can, which is why it goes to the Trash by default and why nothing risky is preselected.

Price, side by side

Both are one-time purchases if you want them to be, both are cheap, and neither has an account.

Why you might choose CleanSpace

Pick CleanSpace over DaisyDisk when the thing you actually need is not a picture.

If you have already looked at a disk map — or at du -sh ~/Library/* — and the answer was “thousands of small files across a dozen folders”, a map has told you everything it can. That shape of problem is caches, leftovers, snapshots and derived data, and clearing it means knowing which paths are regenerable. That knowledge is what a cleaner is.

Pick it too if you want the surrounding jobs in one place: removing an app properly, seeing what starts at login, checking for adware persistence, clearing browser traces before selling the Mac. And pick it if you want to check before paying — every scan runs at full detail for free, forever, so you can find out whether your problem is even a cleanable one.

Pick DaisyDisk if your disk is full of files you put there yourself. Video, photo libraries, virtual machine images, downloaded datasets, game installs. For that, the sunburst is the right tool, it is $9.99, and no cleaner will find those for you any better than you can.

The honest recommendation

DaisyDisk is $9.99 once; CleanSpace is $10 a year with a SecureMacApps plan. Owning both is not extravagant, and they answer different questions.

Before either, spend twenty minutes with the tools already on your Mac. mdfind 'kMDItemFSSize > 1073741824' lists every file over a gigabyte instantly — four more free ways here — and System Settings → General → Storage covers the obvious. If that clears enough, you are done and neither app was necessary.

If it did not clear enough, the follow-up question tells you which to buy. Where is my space? is DaisyDisk. What of this can I safely delete? is CleanSpace.