KnockKnock – find out what is permanently installed on your Mac.

Most malware survives reboots by installing itself somewhere it can start automatically. KnockKnock scans those exact locations and shows you everything that persists on your Mac — so you can spot anything that should not be there.

Key Features:

• Persistence Scanner: Finds software that installs itself to run automatically at startup or login.
• VirusTotal Integration: Checks flagged items against VirusTotal to help identify known threats.
• Detailed Results: Shows launch agents, login items, browser extensions, and more in one scan.
• Clean Interface: Simple and easy to read — no technical knowledge required to run a scan.
• Open Source: Built by Objective-See, fully transparent and free from hidden trackers.
• Free Forever: No subscription, no upsells, no paid version.