Invisible meeting AI for Mac and Windows: how it works on each OS
By The Assistly team ·
Invisible meeting AI lives or dies on one OS capability: a window's ability to exclude itself from screen capture. Both macOS and Windows provide it, but they provide it differently — and the differences are exactly where tools quietly fail. If you're evaluating an "invisible" assistant for your Mac or PC, this is what's happening under the hood.
The shared idea
When you share your screen on Zoom, Meet, or Teams — or when anything records your display — the capturing app asks the OS for the screen's pixels. Capture exclusion means the OS composites that frame without the excluded window. The overlay is fully visible on your physical display, but its pixels never enter the capture buffer. Nothing is transmitted for the other side to see, which is a stronger guarantee than "small and easy to miss."
On Windows
Windows exposes this as display affinity: an app can mark a window so that capture APIs render it excluded from the captured frame. It's the same family of protection Windows uses for DRM content. In practice, on Windows 10/11 this behaves consistently across the major meeting apps' screen-share paths — it's the more straightforward of the two platforms.
The Windows-specific tell isn't the pixels; it's the process list. An invisible window still belongs to a named process in Task Manager, and monitoring or proctoring software that scans process names will match a famous assistant name instantly. That's why a renamable app with a custom icon matters as much as the capture flag.
On macOS
macOS has long honored window-level exclusion from capture — but the story has more moving parts:
- The behavior differs between whole-screen sharing and single-window sharing, and between capture APIs.
- ScreenCaptureKit on macOS 15+ introduced newer capture paths that can composite windows differently and bypass assumptions built on the older flags. An overlay that was invisible on macOS 13 isn't automatically invisible on every capture path of macOS 15 — the vendor has to track Apple's capture stack release by release.
This is the honest caveat every macOS "invisible AI" claim carries, whether the vendor mentions it or not. The engineering deep-dive is in how undetectable AI overlays work. The takeaway when evaluating: prefer a vendor that acknowledges the macOS capture nuances over one that just stamps "100% undetectable" on the page.
What can't see you on either OS
Worth restating, because it's the most common misconception: Zoom, Meet, and Teams themselves cannot detect an overlay on either platform. A meeting client sees your camera, your mic, and — only when you share — the capture frame the OS hands it. There's no API for inspecting what's running on your machine. On a vanilla call with no screen share, the risk isn't technical at all; it's behavioral (can interviewers detect AI).
Assistly on both platforms
Assistly is a native app on both sides: macOS on Apple silicon (macOS 13+) and Windows 10/11 — one overlay, engineered against each OS's capture stack:
- Capture exclusion on every plan, on both platforms — no premium "stealth" tier.
- Renamable app + custom icon on both, so process scans see nothing recognizable.
- The same live engine everywhere: it captures the call's own audio (works with headphones), separates who said what across speakers, streams guidance with low latency, and generates notes and action items after every session.
- It's a native overlay, not a browser extension — extensions can't use these OS mechanisms at all, which is why they keep appearing in screen shares.
Free is 5 sessions a month (45 minutes each, full feature set, no card); Pro is $14.99/month, unlimited. Same pricing, same features, both platforms.
The fine print that applies everywhere
Invisibility is a property of the pixels, not a pass on the rules. Use meeting AI within the policies of the call or process you're in, and mind recording-consent laws where participants are. And no OS mechanism fixes the human tells — long pauses and reading eyes out you on any platform.
Try it free on your Mac or PC — or compare the whole field in the most undetectable AI assistants.