Important: platform coverage differs
BleachBit runs on Linux and Windows. Mole and Pearcleaner are macOS only. Windows users get BleachBit, which cleans files and privacy data but does not focus on registry repair or startup management like CCleaner does.
Mole: free CLI, paid app
The Mole repository is the free, open-source command-line tool, licensed under GPL-3.0, that cleans caches, uninstalls apps with their leftovers, analyzes disk usage, and optimizes the system. A separate native Mole for Mac app adds a graphical interface and live status monitoring for a one-time $19 license that covers two Macs. The app itself is not what the repository contains.
Pearcleaner is source available
Pearcleaner is licensed under Apache 2.0 with the Commons Clause, which prohibits any form of monetization of the software or modified versions. You can read, modify, and contribute to the code, but it is not an open-source license by the OSI definition. It removes apps with their associated files, finds orphaned data, and manages Homebrew.
BleachBit for privacy
BleachBit is licensed under GPL-3.0 or later and cleans caches, cookies, history, logs, and temporary files for thousands of applications, shreds files, and wipes free space. Be careful with advanced options, since deleting the wrong data can break applications.
Maintenance status
Mole and BleachBit were updated within days of this update. Pearcleaner's last commit was in June 2026, and it is a personal hobby project whose maintainer does not accept opinion-based feature requests.