This comparison focuses specifically on stealth mode capabilities. For a full product comparison, see our general comparison page.
Final Round AI's Interview Copilot was one of the first real-time interview assistants. PrepPilot entered the market with a focus on native desktop stealth technology. Here is how their stealth capabilities compare.
| Stealth Feature | PrepPilot | Final Round AI |
|---|---|---|
| Overlay type | Native desktop (Tauri/Rust) | Browser-based extension |
| OS-level capture exclusion | ✓ Yes | ✗ No |
| Invisible on Zoom | ✓ Guaranteed | ⚠ Depends on config |
| Invisible on Google Meet | ✓ Guaranteed | ⚠ Depends on config |
| Invisible on Teams | ✓ Guaranteed | ⚠ Depends on config |
| Invisible on Webex | ✓ Guaranteed | ⚠ Unreliable |
| Transcription engine | Deepgram Nova-2 | Built-in |
| Transcription latency | <300ms | ~600ms |
| AI models | 6 models | 1 model |
| Switch models mid-interview | ✓ Yes | ✗ No |
| Language support | 30+ | English primarily |
| Overlay repositioning | ✓ Drag anywhere | ✓ Fixed positions |
| Overlay opacity control | ✓ Yes | ✗ No |
| Coding mode with syntax | ✓ Yes | ✓ Yes |
| System design mode | ✓ Yes | ✗ No |
| Memory usage | ~50 MB | Browser tab (~200 MB) |
| Free trial | ✓ 50 credits | ✗ Paid only |
The critical difference is architecture. Final Round AI runs as a browser extension, which means its overlay exists within the browser's rendering context. When you share your screen or a specific browser window, some platforms can capture browser extension overlays.
PrepPilot's overlay is a native OS window with display affinity flags set to exclude it from screen capture. This is the same technology that Windows uses for DRM-protected content. It is fundamentally impossible for screen-sharing software to capture the overlay because the operating system itself hides it.
Final Round AI uses a built-in transcription engine that processes audio in chunks. PrepPilot uses Deepgram Nova-2 with a streaming WebSocket connection, delivering transcription results in under 300ms. In a rapid-fire interview with follow-up questions, this speed difference means PrepPilot shows you the complete question before Final Round AI even starts processing it.
For pure stealth reliability, PrepPilot is the clear winner. Its native desktop overlay with OS-level capture exclusion is the most robust approach available. Final Round AI has a strong brand and broader ecosystem, but its browser-based stealth approach carries real detection risk. If your priority is guaranteed invisibility during screen sharing, PrepPilot is the safer choice.
Download PrepPilot and test the OS-level stealth overlay with 50 free credits. No credit card required.
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