Sifty vs BleachBit: two open-source Windows cleaners compared

Both are free and open source, and both let you preview before they clean. They are built for different jobs, though, and honestly they pair well together. Here is where each one wins.

What they have in common

It is worth saying up front, because a lot of comparison pages would not: BleachBit is a genuinely good tool. It is free, open source, actively maintained, and it previews exactly what it will remove before you commit. If you are choosing between a closed-source cleaner and BleachBit, BleachBit is the easy call.

Sifty shares that DNA. It is also free, also open source, and also dry-run first. So the choice between the two is not about trust or price, it is about what you actually need to do.

Where BleachBit is the better pick

You are on Linux too. BleachBit is cross-platform. Sifty is Windows-only by design.
You want secure deletion. BleachBit can shred files beyond recovery and wipe free space. Sifty deliberately does the opposite: it never permanently deletes, so it cannot shred.
You want the widest app-cleaner database. BleachBit has years of community "cleaners" covering a huge list of applications.

Where Sifty is the better pick

You want a safety net. Sifty sends everything to the Recycle Bin and sifty undo reverses the last clean. BleachBit deletes permanently with no undo, which is the point of a shredder but unforgiving if you misclick.
You have developer clutter. Sifty clears node_modules, build output and orphaned git worktrees, and compacts bloated WSL2 disks. BleachBit does not.
You want more than cleaning. Sifty finds duplicate files, analyzes disk usage, uninstalls apps with a leftover scan, applies updates through winget, and manages startup items. BleachBit is focused on cleaning.

Side by side

Feature	Sifty	BleachBit
Junk and cache cleaning	Yes, 11+ categories	Yes, large database
Preview before cleaning	Yes, dry-run default	Yes
Deletes to Recycle Bin	Yes	No, permanent
Undo a clean	Yes	No
Secure shredding / wipe free space	No, by design	Yes
Duplicate file finder	Yes, SHA-256	No
Disk usage analysis	Yes	No
App uninstall + leftovers	Yes, via winget	No
App updates	Yes, via winget	No
Startup / services manager	Yes	No
Developer cleanup (node_modules, WSL2)	Yes	No
Local AI assistant	Yes, Ollama	No
Scriptable	Yes, JSON output	Yes, CLI
Platforms	Windows	Windows, Linux
License	MIT	GPL
Price	Free	Free

Honestly? You can run both

They are not really rivals. A reasonable setup on a Windows dev machine is Sifty for everyday maintenance (cleaning with an undo net, duplicates, app and update management, clearing build clutter and WSL2 bloat), and BleachBit when you specifically want to securely shred a file or wipe free space before handing off a drive. Use the right tool for the moment.

Try Sifty

Start with the read-only commands, which cannot change anything:

PS C:\> sifty checkup       # one read-only scan across everything
PS C:\> sifty junk scan     # reclaimable space by category, deletes nothing

Sifty vs BleachBit