A side-by-side look at every serious AI interview assistant on the market — hard numbers where we have them, checkmarks where we don't, and honest context for each.
| Capability | Cowinx | Interview Coder | Final Round AI | LockedIn AI | ChatGPT copy/paste |
|---|---|---|---|---|---|
Answer latency?Approximate provider time to first token in our April 24, 2026 text-only relay benchmark. It excludes speech segmentation and transcription time. | 380 ms | Not published | Not published | 116 ms vendor avg | Manual workflow |
Question-detection accuracy?Legacy Cowinx marketing reported 97.2% across 14,000 question events. We have not located the source dataset, so this claim is not independently reproducible. | 97.2% | — | — | — | — |
Flagship LLMs, auto-routed?Automatically picks Claude Opus 4.7, GPT-5.4, or Gemini 3.1 Pro per question type. Model upgrades are free. | Opus 4.7 · GPT-5.4 · Gemini 3.1 | Not disclosed | Not disclosed | Not disclosed | Model selected by user |
Compositor-level stealth?Excluded at the macOS compositor layer — frames never reach the Zoom/Teams/Meet capture buffer in the first place. | Vendor claims full | Vendor claims stealth | Vendor claims discreet | ||
Real-time speech transcription?Streaming ASR with per-language routing across 7 languages: EN/ES/FR/DE/IT/PT via AssemblyAI, ZH via Qwen3-ASR. | |||||
Native macOS (no Electron / browser)?Pure Swift + AppKit — under 50 MB memory, inside macOS sandboxing and code-signing. No Chromium runtime. | Not disclosed | Desktop app | Desktop + web | — | |
Regression testing across platforms?Testing cadence is shown only when publicly documented. Cowinx has an internal regression process but does not yet publish automated run logs. | Internal; no public log | Vendor claims daily | Not disclosed | Not disclosed | — |
Works during live screen share?Your floating panel stays visible to you but is absent from the Zoom/Teams/Meet/Webex capture buffer the interviewer sees. | Vendor claims full | Vendor claims discreet | Vendor claims discreet |
Evidence & methodology
Last verified June 15, 2026 · Cowinx engineering
A five-run Beijing Qwen 3.5 Flash benchmark on April 24, 2026 recorded 379 ms p50 TTFT. Separate GPT-5.4 nano relay runs averaged 329 ms in SJC and 395 ms in IAD. These measure the model's first token, not the entire spoken-question pipeline.
Download benchmark resultsLegacy Cowinx marketing reported 97.2% across 14,000 question events. We have not located the source dataset or scoring procedure, so this claim is not independently reproducible and is not derived from the current production session count.
Legacy marketing claim · source dataset unavailable
We document Dock visibility, process visibility, click-through behavior, and capture exclusion as separate checks. See the product screenshot, interactive demonstrations, and explicit limitations.
Review stealth evidencePrices and product capabilities below are competitor-published claims, not Cowinx certifications. We checked the linked pages on June 15, 2026.
Built around native macOS capture controls, with a 379 ms text-only benchmark result and auto-routing across flagship LLMs. End-to-end latency also includes speech segmentation, transcription, and network time.
A cross-platform interview assistant whose official site claims screen-share, Dock, Activity Monitor, and click-through invisibility.
An interview prep platform with mock interviews and real-time assistance. Focuses on pre-interview preparation with live help as a secondary feature.
A desktop and web interview assistant that offers live transcription, answer suggestions, coding help, and discreet real-time guidance.
The manual approach — keeping ChatGPT open in a separate window and copying questions back and forth. Free but slow, and completely visible to screen share.
2-minute setup on macOS. See for yourself why 380 ms latency and compositor-level stealth make the difference.