StealthCoder vs Ntro.io
The Ntro.io alternative for coding interviews
Updated June 2026
Ntro calls itself truly invisible because the copilot runs on a second device or a browser extension rather than the interview machine. In practice that means you are juggling a phone or a second screen while coding and watching a Chrome extension, which is the form factor interviewers and proctoring tools look for. StealthCoder runs as one native desktop app on the machine you are already using, invisible during the share, keyboard-only, with system design included and answers in under 2 seconds.
Built by an Amazon engineer who tried half these tools before building the one he actually trusted on a live screen share.
StealthCoder vs Ntro.io, side by side
| Feature | StealthCoder | Ntro.io |
|---|---|---|
| Price | $15/mo billed $180/yr · $40 monthly · 7-day free trial | $24.99/mo free Starter capped at ~10 hints per session |
| Platforms | Mac, Windows | Chrome ext, Mobile |
| Coding / LeetCode | ✓ | ✓ |
| System design | ✓ | — |
| Online assessments | ✓ | ✓ |
| Invisible on screen share | ✓ | ✓ |
| How it stays hidden | Native desktop app, keyboard-only, nothing clickable | Browser extension + second-device console |
| AI model | Latest Claude models | Unverified |
Ntro.io details from public sources, last checked June 2026.
Why engineers pick StealthCoder over Ntro.io
- →Ntro relies on a Chrome extension plus a second-device console. StealthCoder runs as a single native desktop app on the machine you are interviewing on, no second screen to juggle.
- →Browser extensions are a known thing interviewers check for. StealthCoder has no extension to detect.
- →StealthCoder includes system design. Ntro is focused on coding and technical hints.
- →StealthCoder is $15/mo on the annual plan against Ntro's $24.99/mo, and the free Ntro tier is capped at around 10 hints per session.
Where Ntro.io falls short
- ✕Splits across a browser extension and a second-device console, so you are managing two surfaces during the interview.
- ✕Browser extension is the most detectable form factor in a screen share.
- ✕Free tier is heavily throttled at around 10 hints per session.
- ✕Thin independent track record and no clear system design support.
You can keep shopping tools, or you can run the one built by an engineer who passed his own loop with it. StealthCoder reads the problem on screen and surfaces a working solution in under 2 seconds, invisible during the share. $15/mo, 7-day free trial, cancel in one click.
Get StealthCoderWhen Ntro.io might be the better pick
If you specifically want nothing running on the interview machine and you are comfortable reading from a second device, Ntro's split model gives you that separation. Most people will find one invisible native app easier and harder to spot than an extension plus a phone.
StealthCoder vs Ntro.io FAQ
Is StealthCoder a good Ntro.io alternative?+
Yes. StealthCoder runs as one native desktop app on your interview machine, invisible during screen share, with no browser extension and no second device to manage, plus system design support.
Does Ntro use a browser extension?+
Yes, Ntro runs as a Chrome extension paired with a second-device console. StealthCoder is a native desktop app with nothing in the browser to surface during a share.
Which is cheaper?+
StealthCoder is $15/mo on the annual plan. Ntro's paid plan is $24.99/mo, and its free tier is limited to roughly 10 hints per session.
Does StealthCoder need a second device?+
No. StealthCoder runs entirely on your interview machine and stays invisible during the screen share.
Compare StealthCoder to other tools
See what they actually ask: leaked OAs, questions by company, and the most recycled problems.
You compared the tools.
Now go pass the interview.
StealthCoder runs invisibly during the live screen share, on coding rounds and system design. Works on HackerRank, CodeSignal, CoderPad, and Karat. $15/mo, 7-day free trial.