The overlay uses macOS system-level content protection on every window, which is why it stays out of Zoom screen shares, Google Meet shares, Microsoft Teams shares, Loom captures, and QuickTime recordings without you toggling anything. If you screen share on a free call to show a deck, the Whisply panel is not in the shared video. That behavior is the same on the free tier as on Pro.
Permissions are the macOS standard ones. Screen Recording lets it see your screen. Microphone lets it hear the call. Accessibility, only on Pro Undetected, lets Computer Use click and type for you. You revoke any of them in System Settings and the corresponding feature stops working, no account flag, no support ticket.
We do not run a notetaker bot. We do not dial into your meeting on your behalf. The other people on the call see the participants they always saw. The audio Whisply hears is the audio your Mac is already playing, captured by your microphone, processed in the way the free tier or your plan describes.