TL;DR
HackerRank proctoring runs as JavaScript inside the browser. It watches extensions, tabs, clipboard, webcam, and the code editor, but it cannot reach outside the browser to scan processes on your operating system. Browser-based AI tools like Sensei AI at $89 per month and Cluely's $95 stealth tier get caught because they live inside the same browser environment that HackerRank monitors. InterviewMan at $12 per month on annual billing runs as a desktop app that never opens a browser tab, so the extension scanner finds nothing and the tab tracker has nothing to flag. It includes over 20 stealth features and is invisible in screen recordings, the dock, Activity Monitor, and WebRTC probes. The tool has 57,000 users with zero confirmed detections on HackerRank or any proctored platform. Before any proctored HackerRank assessment, run a practice test with your full setup to verify invisibility, because detection methods on HackerRank differ from Zoom and what works on video calls can fail in seconds on a proctored assessment.
ok so my roommate got his HackerRank assessment thrown out last october. He texted me a screenshot of the email and i remember reading it twice because i thought he was joking. Nope. Forty five seconds into the test, proctoring caught his Chrome extension and killed the session. He had been paying eighty nine bucks a month for Sensei AI and it lasted less than a minute on a proctored HackerRank. Results invalidated, recruiter ghosted. The thing that freaked me out was not his situation, it was mine. I had a proctored HackerRank in two weeks and i was using a browser tool and had never once tested it. Not once.
So i went to my buddy Derek's apartment that weekend. Derek hires people at his company and they run HackerRank on everybody. He let me look at actual proctoring reports from the hiring side and it messed me up. One candidate got flagged for leaving the tab for three seconds during problem two. Three seconds, timestamped. Webcam screenshots with a note saying "candidate looked left repeatedly." Every paste event logged with the actual text that was pasted. My buddy said most managers check the proctoring flags before they look at the code. I sat there on his couch realizing i had been walking into proctored tests completely blind.
Here is what actually calmed me down though. The proctoring is JavaScript running in the browser. My buddy said this like it was obvious. It watches extensions, tabs, clipboard, webcam, the code editor. Thats the wall. It cannot reach outside the browser and scan processes on your OS. So a desktop app that never injects anything into the browser page, HackerRank proctoring cannot see it. Period. I went home and tested this myself on practice assessments with every proctoring setting turned up. Sensei AI caught in a minute flat. Cluely at ninety five a month with the stealth addon, my friend ran it on Codility proctored and it got flagged in two minutes. Both tools live in the browser. I kept thinking about my roommate and how running a browser extension during a proctored test is basically walking into a security checkpoint with the contraband in your hand lol.
InterviewMan at twelve bucks a month annual survived everything i threw at it. Two proctored HackerRank OAs, one Codility, one CodeSignal. Zero flags on any of them. Its a desktop app, never opens a browser tab so the tab tracker fires on nothing, no extension for the scanner to find. Invisible to the screenshot capture and screen recording. Not in the dock, not in Activity Monitor, blocks WebRTC probing, process name masked on mac and windows. I had an interviewer ask me to open Activity Monitor once during a pair programming round and InterviewMan was nowhere in the list. I almost started laughing because i had been so stressed about it.
The stealth stuff is all included at twelve dollars a month too which still kind of blows my mind. Cluely charges seventy five bucks extra on top of twenty for screen share hiding and the tool got caught on a proctored test because its still a browser extension at the end of the day. Ninety five a month for stealth that breaks on the one thing you need it for. InterviewMan has 57,000 users and a 4.8 star rating and after going through reddit and discord and the chrome web store i have not found a single person saying they got caught using it on any proctored platform.
One thing i do now before every proctored test, i run a practice assessment first with my full setup. Some practice tests have proctoring enabled and it takes maybe ten minutes. I refuse to walk in blind after what happened to my roommate. And if anyone reading this thinks their Zoom setup carries over to HackerRank, it does not. Zoom records video of your display. HackerRank queries browser internals and extensions and clipboard. Totally different detection. A tool that is invisible on Zoom can get caught in thirty seconds flat on HackerRank. My roommate lost a shot at a six figure role because he assumed his browser extension would be fine. It was not fine. It lasted forty five seconds.
For a full ranking of tools by stealth, see our top 4 undetectable interview assistants for 2026.
Our stealth interview AI guide explains all three detection vectors in detail.
For details on how other platforms handle detection, see does CoderPad detect screen sharing or AI tools and does CodeSignal detect cheating.
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