StealthCoder

Undetectable Coding Interview Tools Compared: StealthCoder vs InterviewCoder vs Others (2025)

2025-09-06

In 2025, one of the biggest shifts in technical hiring is the rise of AI interview assistants. Instead of grinding hundreds of LeetCode questions, many candidates are turning to tools that provide instant solutions during prep and sometimes even during live interviews.

A question that comes up constantly is: which coding interview tools are actually undetectable?

Let’s compare the leading options.

What “Undetectable” Really Means

Undetectable does not just mean invisible on screen share. It also means:

  • The overlay or assistant does not show up on Zoom, Teams, Google Meet, or Chime.
  • It leaves no trace in recordings.
  • It works reliably without special setup or risky workarounds.
  • It does not give away suspicious behavior, like pasting answers too quickly.

With that in mind, here’s how the top tools stack up.

1) StealthCoder

Overview:

StealthCoder is a desktop app built by a FAANG engineer specifically for interviews. With a simple shortcut, it captures the coding prompt on your screen and instantly shows a clean solution, explanation, and complexity analysis in an invisible overlay. It also includes StealthDesign for system design interviews.

Stealth:

  • Invisible on Zoom, Teams, Google Meet, CoderPad, HackerRank, and CodeSignal right out of the box.
  • Works on Windows, Mac, and Linux.
  • No configuration required.

Pros:

  • Covers both coding and system design.
  • Affordable ($15/month billed annually or $40 month-to-month).
  • Local-first design keeps your data private.
  • Minimal UX that reduces stress.

Cons:

  • Requires you to still explain answers in your own words.

👉 Try StealthCoder

2) InterviewCoder

Overview:

InterviewCoder is one of the earliest “undetectable” interview assistants. It focuses on coding problems only. You capture the question with a hotkey and the tool generates a solution in a floating window.

Stealth:

  • Works on some platforms, but requires specific Zoom settings and does not always function on Amazon Chime or newer MacOS builds.
  • Users have reported detection in certain setups.

Pros:

  • Good for LeetCode-style practice.
  • Supports multiple languages.
  • Free tier available.

Cons:

  • No system design support.
  • Higher pricing ($25/month billed annually or $60 month-to-month).
  • Limited to Windows and Mac.
  • Reliability issues on some interview platforms.

3) ChatGPT

Overview:

OpenAI’s ChatGPT can generate code, explanations, and even system design outlines. Many candidates use it for prep.

Stealth:

  • Not undetectable. You need to copy and paste between windows.
  • Visible if used during a screen share.

Pros:

  • Great for practice.
  • Flexible, covers many languages.
  • Can answer design and theory questions.

Cons:

  • Not practical for stealth use.
  • Requires manual input and context setting.

4) GitHub Copilot

Overview:

Copilot integrates into IDEs and autocompletes code as you type.

Stealth:

  • Visible to anyone watching your screen. Not undetectable.

Pros:

  • Excellent for practice in your own IDE.
  • Strong at speeding up day-to-day coding.

Cons:

  • Not built for interviews.
  • Offers no stealth features or interview guidance.

5) Codeium

Overview:

A free AI autocomplete alternative to Copilot.

Stealth:

  • Same as Copilot, visible in editor. Not undetectable.

Pros:

  • Free and fast.
  • Helps with coding practice.

Cons:

  • Not designed for interviews.
  • No explanations or stealth capability.

Key Takeaways

  • For stealth during real interviews: StealthCoder is the most reliable option. It works invisibly across major platforms without extra setup and covers both coding and system design.
  • For coding-only stealth attempts: InterviewCoder is an option, but it comes with risks of detection and higher cost.
  • For practice only: ChatGPT, Copilot, and Codeium are excellent, but they are not undetectable.

Final Verdict

If your goal is to use AI to prepare safely, any of these tools can help. If your goal is to use AI in a real interview without getting caught, StealthCoder is the only tool in 2025 that consistently delivers stealth, affordability, and broad coverage.

👉 Start your free trial here: https://stealthcoder.app

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