OverSight vs Peeker: Two Mac Privacy Tools That Solve Different Problems

Search "Mac webcam privacy" and OverSight comes up first. It's free, it's been around since 2016, and it has the trust of the security community because Patrick Wardle made it. Peeker also uses your camera and also has the word "privacy" in its marketing. So people assume they compete. They don't, and treating them as alternatives misses what each one actually does.

This is a comparison of two tools that happen to live in the same neighborhood.

Quick verdict

OverSight is a free alert tool that tells you when other apps start using your camera or microphone. Install it once, forget about it, get a notification if Zoom secretly turns on your webcam in the background. Peeker is a $5/year detection tool that uses your camera on purpose to watch the space behind you for people who might be reading your screen. They solve different problems and most security-conscious users should just run both.

What OverSight is

OverSight is free software from Objective-See, the nonprofit security tools project run by Patrick Wardle. It monitors your Mac's camera and microphone hardware at the OS level. When any process starts accessing the camera or mic, OverSight pops up a notification telling you which app did it. You can then allow it (you started a Zoom call), block it (some background process you don't recognize), or whitelist the app for the future.

OverSight doesn't use the camera itself. It watches the camera's status. The use case is malware and snoopware detection: if a malicious app or a compromised legitimate app turns on your camera silently, OverSight catches it. It's been recommended by security researchers and journalists since 2016 and remains one of the most-installed Objective-See tools. Free, open source, donation-supported.

What Peeker is

Peeker is a paid macOS app ($5/year) that actively uses your webcam to detect when a person is behind you. When it sees someone in frame, it pops up a small live preview of what's behind you in the corner of the screen. You glance, see them, and decide what to do. The use case is shoulder surfing in cafes, offices, planes, and any environment where strangers can walk behind you while you're working.

Peeker uses on-device computer vision. The camera feed never leaves your Mac. There's no cloud, no account, no telemetry. The app sits in the menu bar and runs at maybe 2 to 4% CPU.

Head-to-head

Threat models

OverSight protects against software threats. Someone has installed something on your Mac that wants to spy on you through the camera. Peeker protects against human threats. Someone in the same physical room is reading your screen. These are completely separate attack vectors. A user with both threats running both tools is being sensible, not redundant.

How they use the camera

OverSight doesn't use the camera. It monitors the camera's TCC permissions and process access logs. Peeker actively reads frames from the camera, runs them through a person-detection model locally, and discards them. If you don't want any app reading camera frames, even locally, Peeker isn't for you and OverSight still is.

What you'll actually notice day to day

OverSight is silent 99% of the time. You forget it exists until a popup says "Zoom just turned on your camera." Peeker is also quiet most of the time, but when someone walks behind you, you'll see a small preview appear in the corner. OverSight reacts to apps. Peeker reacts to people.

Where each one wins

OverSight wins as malware defense. If your concern is "what if some app I trust is secretly recording me," OverSight is the right tool. It's also free, which makes it a no-brainer install on any Mac.

Peeker wins as shoulder-surfing defense. If your concern is "what if the guy at the next table is reading my screen," OverSight does nothing for you. Peeker is the right tool there.

The two tools live in the same category by accident. They protect against problems that share the word "camera" and almost nothing else.

For a broader view, see our comparison of webcam-based privacy apps for Mac and the underrated Mac privacy apps roundup, which covers both.

The verdict

If you only want one, pick based on which problem you actually have. Worried about malware reading your camera? OverSight, and it's free, so just install it. Worried about humans reading your screen in public? Peeker, and $5/year is cheap insurance. Worried about both? Run both. They don't conflict and they cover different attack surfaces. Most security-aware Mac users I know run OverSight alongside several other Objective-See tools and add something like Peeker on top.

Try Peeker

If shoulder surfing is the part of your threat model that isn't covered yet, Peeker is $5/year at getpeeker.com, with a 7-day free trial. Works alongside OverSight without conflict. No account, no data leaves your Mac.