Every European PC optimization software tool reviewed
Rastede, Germany
Founded 1999
Free edition; Pro $14/year (3 PCs) or $20 one-time
Free edition and 30-day trial
Best for: Windows users who want one suite for cleanup, startup and privacy settings
Ashampoo GmbH & Co. KG has been making Windows software in Rastede, Lower Saxony, since 1999, and WinOptimizer is the product that most directly covers what Advanced SystemCare, CCleaner and similar suites do: disk and browser cleanup, a startup manager, registry cleaning, Windows privacy and telemetry settings, and a set of smaller tools for services, context menus and file shredding.
The licensing is the unusual part. There is a free edition, a 30-day trial of the Pro version, a yearly subscription covering three PCs, and a one-time licence for a single PC — the last of which has become rare in this market. Ashampoo also sells a separate Driver Updater and UnInstaller for those who want the individual pieces.
What Ashampoo WinOptimizer does well
- German company with a published impressum and commercial register entry
- Free edition, 30-day trial and a one-time licence option
- Covers cleanup, startup, privacy settings and tuning in one suite
- Separate Driver Updater and UnInstaller available
Where Ashampoo WinOptimizer falls short
- Windows only
- Ashampoo's prices are almost always shown as discounts from a much higher list price
- The number of modules can feel like more than most PCs need
Standout feature. A one-time licence for a full optimization suite, from a company with a German commercial register entry, in a market that has almost entirely moved to auto-renewing subscriptions.
Limassol, Cyprus (MacPaw founded in Kyiv, Ukraine)
Founded 2008
From €39.95/year (1 Mac)
Free trial, 30-day money-back
Best for: Mac users who want the most complete cleanup and maintenance app
CleanMyMac comes from MacPaw, founded in Kyiv in 2008, and is sold under terms that name MacPaw Way Ltd. in Limassol, Cyprus, as the contracting party with Cypriot law and courts. It covers hidden system junk, large and forgotten files, duplicate photos, uninstalling apps with their leftover data, memory and CPU load, app updates and a malware scan, and it is notarized by Apple.
The caveat is in MacPaw's own privacy policy, which lists storage and processing in Cyprus, the United Kingdom, the United States and Ukraine. The cleaning runs locally; the account, licence and analytics data are what travel. Pricing starts at €39.95 a year for one Mac, with a free trial and a 30-day money-back guarantee.
What CleanMyMac does well
- Most complete Mac cleanup app in this category, malware scan included
- Notarized by Apple
- Contracting entity in the EU (Cyprus)
- Free trial and 30-day money-back guarantee
Where CleanMyMac falls short
- Privacy policy lists US and UK storage alongside Cyprus and Ukraine
- Yearly subscription as the main model
- Mac only
Standout feature. The only Mac tool in this category that covers cleanup, uninstalling, maintenance and malware scanning in one app, sold by an EU entity.
Ruse, Bulgaria
Founded 2007
Free edition; Pro $24.95 list (perpetual licence)
Free edition, 60-day money-back
Best for: Anyone whose real problem is software that will not uninstall cleanly
Revo Uninstaller is made by VS Revo Group Ltd. in Ruse, Bulgaria, and has been since 2007. It does one job: it runs a program's own uninstaller and then scans for the files, folders and registry entries that uninstaller left behind, which on a Windows machine that has been in use for a few years is where much of the clutter comes from.
There is a free edition, and Revo Uninstaller Pro is sold as a lifetime licence with a year of updates included, at a list price of $24.95, plus a portable edition licensed for unlimited PCs. The vendor offers a 60-day money-back guarantee, the longest in this category.
What Revo Uninstaller does well
- Does one job — removing leftovers — and does it thoroughly
- Free edition available
- Pro is a lifetime licence, not a subscription
- 60-day money-back guarantee
Where Revo Uninstaller falls short
- Not a full optimization suite: no privacy tuning or disk cleanup suite around it
- Windows only
- Updates beyond the first year cost extra
Standout feature. A lifetime licence and a 60-day money-back guarantee on the tool that fixes the thing optimizers usually only report: software that never fully left.
Berlin, Germany
Founded 1997
ShutUp10++ free; O&O Defrag Pro €49.90 list (perpetual)
Freeware and trial versions
Best for: Windows users who want targeted, well-established tools rather than a suite
O&O Software GmbH in Berlin has been making Windows system software since 1997. Two of its tools matter here. O&O ShutUp10++ is freeware that lays out Windows 10 and 11 telemetry and privacy settings as individual switches with a recommendation for each, and it is still maintained for current Windows 11 builds. O&O Defrag is a defragmentation and drive-optimization tool sold as a permanent licence.
Neither tries to be a one-click optimizer, and that is the point. ShutUp10++ addresses the privacy side of what suites like Advanced SystemCare bundle, and Defrag the disk side, each with more control than a suite gives.
What O&O Software does well
- O&O ShutUp10++ is free and actively maintained
- O&O Defrag is a permanent licence
- Berlin company with a published impressum
- Clear, per-setting explanations rather than a single "fix" button
Where O&O Software falls short
- Separate tools rather than one suite
- Windows only
- Defragmentation matters little on SSD-only machines
Standout feature. O&O ShutUp10++: a free, maintained, German tool that shows every Windows telemetry setting individually and lets you decide.
Ganderkesee, Germany
€29.95
30-day test version
Best for: Windows users who want a simple tuner from a small German vendor
Abelssoft is the trading name of Ascora GmbH in Ganderkesee, Lower Saxony, which says it has been developing Windows software since 1994. PC Fresh is its tuning tool: startup management, background services and system settings aimed at making Windows boot and respond faster, with a simpler interface than the larger suites.
The full version is €29.95 with at least six months of free updates, and there is a 30-day test version. Abelssoft sells a separate cleaner, WashAndGo, for disk and browser cleanup, so PC Fresh alone is narrower than WinOptimizer.
What Abelssoft PC Fresh does well
- German company with a published impressum
- Simple, focused interface
- 30-day test version
- No subscription required for the full version
Where Abelssoft PC Fresh falls short
- Narrower than a full suite; cleanup is a separate product
- Update period of the licence is only stated as "at least 6 months"
- Windows only
Standout feature. A deliberately small tuning tool from a small German vendor, for people who want fewer switches rather than more.
Stockholm, Sweden
Founded 2013
$29/year or $59 one-time (3 Macs)
Free download, 14-day refunds
Best for: Mac users who want monitoring and cleanup with a one-time licence
Sensei is made by Cindori AB, registered in Stockholm in 2013. It combines cleanup and an uninstaller with hardware monitoring — a thermal dashboard for temperature sensors and fans, a S.M.A.R.T. drive health report, battery health and live CPU and GPU statistics — which makes it as much a dashboard for the Mac as a cleaner.
It costs $29 a year or $59 once, each covering up to three Macs, with a free download and 14-day refunds. Payments go through Paddle, and the privacy policy names Sentry and Amplitude and says data may be stored outside the European Union.
What Sensei does well
- One-time licence option covering three Macs
- Hardware and SSD health monitoring alongside cleanup
- Swedish company
- Free download to try
Where Sensei falls short
- Privacy policy allows storage outside the EU and names US analytics tools
- Smaller feature set than CleanMyMac for pure cleanup
- No address published on the vendor's own site
Standout feature. The only tool here that treats the Mac's hardware health as part of maintenance, with a one-time licence for three Macs.
France
Founded 2003
Free (donations)
Free
Best for: Mac users comfortable with a technical tool who want to pay nothing
OnyX has been published by Titanium Software in France since 2003 and is free, supported by donations. It verifies the structure of the system files, runs cleaning and maintenance tasks, deletes caches, rebuilds databases and indexes, uninstalls applications, and exposes settings in the Finder, Dock, Safari and other Apple apps that would otherwise need the command line. A separate version is released for each macOS version, including macOS 27 in September 2026.
It is a technical tool and makes no attempt to look like a consumer app. It also has no company behind it that we could find: the privacy policy names a person and the French regulator, but no registered entity. With no account, no licence server and no subscription, there is also very little to hold.
What OnyX does well
- Completely free
- No account and no licence server
- Released for each new macOS version
- Runs the maintenance macOS hides
Where OnyX falls short
- Technical interface aimed at experienced users
- No registered company found behind it
- No malware scan or duplicate finder like CleanMyMac
Standout feature. Free, account-free Mac maintenance that has been kept current with every macOS release since 2003.
