tested 4 assistant tools across 4 hackerrank OAs in march, here is which one actually survived
took 4 hackerrank OAs in march for different companies, ended up testing 4 different assistant tools. one per assessment because i wanted a real apples to apples on which one actually survives the new hackerrank detection. writing this up because every "tools that survive hackerrank" thread i find is people who tried one tool, got lucky once, and posted like it was a scientific verdict.
context. all four OAs were proctored, all of them had the camera tier on, all of them were the standard 90 minute window with two problems. companies were a fintech, a mid stage saas, a healthcare adjacent startup, and one big retail. zoom for one panel question in two of them, the other two were code only. a thread on r/cscareerquestions in late january warned that hackerrank ai tool detection had gotten way more aggressive in the new build and that half the chromium based helpers people were trying were getting flagged on the report. so i spaced the 4 OAs across march, used a different tool for each, and saved the proctoring report afterward where the company gave it back.
tool one was a chromium overlay i had been on since last year. it had worked fine for me previously. report came back with "application activity detected" wording at the top. recruiter went silent two days later. fintech, gone. did not even get to talk to anyone.
tool two was a different chromium based helper, one of the bigger names. i thought maybe my tool one was just outdated. same exact wording on the report. healthcare startup recruiter ghosted me. so chromium architecture in general is the problem, not just one specific tool. focus loss is what hackerrank logs and any window the OS treats as a focusable app trips it.
tool three was a native macos overlay. one of the smaller competitors that markets itself as undetectable. the answer panel was native but the chat input on the side was still its own focusable window. report came back with the same flag wording. saas company never replied. that one stung because i actually liked the tool and thought it was the answer.
tool four was the one a couple of people in that r/cscareerquestions thread had been pushing since february. native overlay, mouse pass through across the entire interface, the whole window excluded from screen capture, hidden from cmd tab and from the dock. zero focusable surface anywhere. ran my retail OA with it. report came back blank. recruiter set up the next round on monday. that is the one that survived.
so the count is 1 out of 4 against the new 2026 hackerrank ai tool detection. and the only one that worked was the one with no focusable window in the entire interface. the other three all tripped the same focus loss check no matter which company was running it or which version of the assessment they were using.
what i learned the hard way is that "tools that survive hackerrank" basically means "no part of the interface can take focus." pass through on the answer panel is not enough if the chat or the settings panel still pulls focus. it has to be the whole thing. ill drop the actual price comparison and the tool name in a comment because the sub mods get cranky about pricing in the OP.
anyone else here run a similar 1 to 1 test across multiple OAs in the last couple months? curious if you came up with the same survivor or if there is something i missed in the chromium category.