Both tools promise real-time AI answers during interviews. We compare every feature that matters so you can pick the right one for your job search in 2026.
LockedIn AI gained popularity as a browser-based interview copilot. PrepPilot takes a different approach with a native desktop application. Here is how they compare across 16 key dimensions.
| Feature | PrepPilot | LockedIn AI |
|---|---|---|
| Application type | Native desktop (Tauri/Rust) | Browser-based |
| Undetectable overlay | ✓ OS-level stealth | ⚠ Browser-level only |
| Screen share invisibility | ✓ Guaranteed | ⚠ Depends on platform |
| Transcription engine | Deepgram Nova-2 | Built-in (proprietary) |
| Transcription latency | <300ms | ~800ms |
| AI models | 6 models (Claude, GPT-5.3, Gemini) | 1 model |
| Languages supported | 30+ | 10+ |
| Coding interview mode | ✓ Yes | ✗ Limited |
| System design support | ✓ Yes | ✗ No |
| Windows support | ✓ Yes | ✓ Yes (browser) |
| macOS support | ✓ Intel + ARM | ✓ Yes (browser) |
| Linux support | ✓ Yes | ✓ Yes (browser) |
| Chrome extension | ✓ Yes | ✓ Yes |
| CV optimizer | ✓ Yes | ✓ Basic |
| Mock interview practice | ✓ AI-powered | ✗ No |
| Free trial | ✓ 50 credits | ✓ Limited free tier |
The fundamental difference is architecture. PrepPilot is a native desktop application that operates at the OS level, making its overlay truly invisible to all screen-sharing software. LockedIn AI runs in the browser, which means its stealth capabilities depend on the browser and platform being used. On some setups, browser-based overlays can be detected.
PrepPilot uses Deepgram Nova-2 for sub-300ms transcription latency. LockedIn AI's built-in transcription typically runs at around 800ms. In a fast-paced interview, this difference is noticeable and can affect how quickly you see and respond to questions.
PrepPilot offers 6 AI models that you can switch between mid-interview. If a coding question comes up, switch to Claude Opus 4.6 for deeper reasoning. For rapid behavioral questions, Claude Haiku 4.5 delivers faster. LockedIn AI gives you one model with no ability to switch.
If stealth reliability is your top priority, PrepPilot wins. Its native desktop architecture guarantees that the overlay is invisible to screen sharing on every platform. LockedIn AI's browser-based approach is convenient but carries detection risk depending on the setup. PrepPilot also leads on transcription speed, AI model choice, and the breadth of its career toolkit. LockedIn AI is a decent option if you want zero-install convenience, but for serious interview preparation, PrepPilot delivers more.
Get 50 free credits and experience the difference. Native desktop stealth, Deepgram transcription, and 6 AI models.
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