Cluely went viral for one reason above all: its AI assistant sits on your screen during calls and meetings, but the person on the other side can't see it. Not dimmed, not blurred — completely absent from the screen share.

That "invisible on screen share" ability is not magic, and it is not something only one app can do. It comes from a documented capability built into Windows itself. In this article we explain how the technique actually works, what it can and cannot do, and how you can use the same operating-system feature for ordinary privacy — hiding a banking page, a personal chat, or a salary spreadsheet when you share your screen.

What Cluely actually does on a screen share

Cluely is an AI assistant that overlays answers and suggestions during meetings and sales calls. Its marketing leans on a provocative idea — the assistant is "undetectable" by the people you're talking to.

Strip away the branding and the trick is simple to describe: the app's overlay window is excluded from everything that captures your screen. Your meeting app (Zoom, Teams, Google Meet, Discord, OBS…) records or broadcasts your desktop, and the overlay simply is not part of what gets captured. To you it looks like a normal window. To everyone else in the call, your screen looks exactly like it did before.

The Windows capability behind it: Windows' built-in capture exclusion

The mechanism is a single Win32 call: Windows' built-in capture exclusion with the flag Windows' built-in capture exclusion. When a window opts in, Windows itself guarantees that the window's pixels are removed from any capture — screenshots, screen recordings, and live screen shares alike. The window keeps rendering locally on your monitor; it is only invisible to capture.

This is a documented, supported Windows capability (available on Windows 10 2004+ and Windows 11). It's the same plumbing used by banks' anti-screenshot protections and by streaming tools that hide overlays from clips. We cover the technical details — flags, limitations, and version requirements — in our deep dive on Windows' built-in capture exclusion and window-level privacy.

Key facts worth knowing:

• It is enforced by the OS, not by the app. No meeting app can "see through" it, because the exclusion happens before the capture ever happens.
• It applies to capture only. The window is still visible on your physical monitor — that's the entire point.
• It is per-window. Each window opts in individually, which is why tools built on this capability let you pick exactly which windows to hide.

You don't need Cluely's overlay to use the same capability

Here's the part most articles skip: Windows' built-in capture exclusion is a Windows capability, not a Cluely feature. Any developer can call it with a few lines of code, and any Windows user can benefit from it — for privacy reasons that have nothing to do with AI assistants.

The everyday cases look like this:

• You share your screen in a standup and your personal chat app is one Alt-Tab away from being exposed. Hide it from capture; keep it open on your monitor.
• You're presenting a demo but your password manager, email client, or banking tab sits on a second monitor. Excluded from the share, still usable by you.
• You teach online classes and your notes or lesson plan must stay off the recording while remaining readable to you.

That is exactly what HideMyShare does: it applies Windows' built-in capture exclusion to the windows you choose — no command line, no code. Pick a window, it vanishes from every share and recording while staying fully visible and usable on your screen. Toggle it back with one click. It also handles a detail most tools miss: the IME candidate window (the pop-up that appears when typing Chinese, Japanese, or Korean) can leak what you're typing — HideMyShare can hide that too.

If you want the raw technical explanation first, start with how window-level privacy differs from virtual backgrounds, or the practical guide to hiding a window in Zoom, Teams, and Meet.

What capture-exclusion cannot do (honest limits)

A tool that hides windows from capture is powerful, but it is not a mind trick. Being straight about the limits:

• It doesn't change what you say or do — only what windows are visible.
• It doesn't hide everything automatically. New windows must be added to the hide list (HideMyShare can also apply rules so this is mostly one click).
• Phone cameras pointed at your monitor see everything. Windows-level hiding excludes digital capture, not light.
• Organizational rules still apply. If your company or school prohibits something, hiding a window doesn't make it allowed — and using screen-privacy tools to misrepresent what you're doing in an exam or interview is dishonest regardless of the technology. This article is about keeping private information private, which is a legitimate need for anyone who shares a screen.

FAQ

How does Cluely stay invisible during screen shares? It applies Windows' Windows' built-in capture exclusion flag to its overlay window, which tells Windows to exclude that window from all screen capture. Meeting apps then share a screen that the overlay simply isn't part of.

Is the "invisible" trick exclusive to Cluely? No. This is a documented Windows capability available to any application since Windows 10 2004. Cluely built its product experience on top of it; tools like HideMyShare expose the same capability for general privacy use.

Can I hide my own windows from Zoom or Teams without writing code? Yes. HideMyShare adds a point-and-click layer on top of the same Windows capability: choose the windows to hide, and they disappear from every screen share and recording while staying visible on your monitor.

Will the hidden window appear in recordings and screenshots too? Yes — the exclusion applies to all capture paths: live shares, recordings, and screenshots.

Does this work with OBS, Discord, and browser-based meeting apps? Yes. Because the exclusion happens at the OS capture layer, it works regardless of which app is doing the capturing, including browser tabs running Google Meet.

Is hiding windows during a share against meeting rules? Keeping unrelated personal windows out of a professional screen share is ordinary privacy hygiene — the same reason people use virtual backgrounds. What matters is honesty about your work; a privacy tool shouldn't be used to misrepresent what you're doing in exams, interviews, or assessments.