Can Cluely Be Detected? The Hidden Interview Copilot Explained
By Vaibhav Devere, Founder, Zero Assist · 2025-05-25 · 5 min read
What Is Cluely
Cluely is an AI-powered interview assistance tool that provides real-time coding suggestions and spoken answers through a screen overlay. Unlike browser-based tools, Cluely is a desktop application that runs alongside the candidate's IDE and video call software.
The tool captures the interview question from the screen, processes it through an LLM, and displays suggested answers in a semi-transparent window that floats above the candidate's normal workspace. For coding interviews, it can generate complete function implementations, SQL queries, and system design explanations.
How Cluely Evades Standard Monitoring
Cluely is specifically architected to avoid the monitoring layers most companies use:
- Browser extensions cannot see desktop applications
- Screen sharing typically records the primary display layer, missing transparent overlays
- Webcam-based proctoring sees the candidate looking at their screen normally — they do not need to look away
- Tab-switch detection is irrelevant because Cluely does not run in a browser tab
The tool operates entirely outside the browser sandbox, making traditional online proctoring ineffective.
Can Cluely Be Detected
Yes — through process-level monitoring and screen overlay detection.
Cluely must exist as a running process to function. On Windows, it typically appears as:
- Cluely.exe or CluelyApp.exe
- Electron or Chromium embedded framework processes
- Node.js runtime processes hosting the application logic
- Associated background services for screen capture and OCR
On macOS, the process signatures differ but the principle is the same: a persistent application process with screen capture permissions.
Detection Methods That Work
Process Signature Matching
The most reliable approach is maintaining a database of known cheating tool process names, hashes, and behavioral patterns. When the monitoring agent enumerates running processes, it flags matches in real time.
Window Layer Analysis
Cluely's overlay window has distinctive properties:
- Always-on-top window flag
- Transparent or semi-transparent background
- Small form factor positioned near screen edges
- No visible taskbar icon in some configurations
OS-level window enumeration APIs can detect these anomalies even when the content itself is invisible to screen capture.
Network Traffic Patterns
Cluely requires an active internet connection to query LLM APIs. While encrypted, the traffic patterns — periodic bursts of outbound data correlating with question complexity — can be characteristic.
What Interviewers Should Know
Cluely does not make a candidate pass an interview. It makes them sound like they know material they may not actually understand. The risk to your hiring process is not that cheaters get through — it is that you cannot distinguish them from genuine candidates without a detection layer.
The correct response to detection is not immediate disqualification. It is structured follow-up:
- Ask the candidate to explain their solution in different terms
- Introduce a constraint change and observe how they adapt
- Probe edge cases the AI tool likely did not cover
A candidate who genuinely understood the solution handles these questions. One who relied on AI assistance struggles.