Windows Built-In Speech Recognition vs Whisper: The Real Numbers
Windows ships with two speech recognition systems. Windows Speech Recognition (WSR) has existed since Vista. Voice Access arrived with Windows 11. Both are free. Neither is Whisper - and the gap between them is larger than most people expect.
This post compares them directly on the metrics that matter for daily dictation: accuracy, latency, vocabulary handling, and compatibility across applications.
The Two Windows Built-In Options
Windows Speech Recognition (WSR)
WSR has been in Windows since Vista and survived through Windows 11. It requires a setup wizard and a brief microphone training session. It's deeply integrated with Windows and can control the interface through voice commands - click buttons, navigate menus, dictate into text fields. The model is offline and runs on your CPU.
Windows Voice Access (Windows 11+)
Voice Access launched with Windows 11 and is the more modern option. It also runs offline. It handles dictation and basic accessibility commands. Microsoft has been iterating on it, and it handles natural language commands better than WSR. Still, it runs locally on consumer hardware with a smaller model than what cloud services use.
What Whisper Is
Whisper is OpenAI's speech recognition model, released in 2022 and widely considered the most accurate general-purpose transcription model available. The large-v3 variant achieves around 2.7% Word Error Rate (WER) on standard English benchmarks - that's near-human transcription accuracy.
Running Whisper locally is slow - 1–3 seconds per utterance even on a decent GPU. The breakthrough came when Groq built hardware specifically optimized for inference. Groq-accelerated Whisper hits the same accuracy with latency under 200ms. That's what dictate.app uses.
Accuracy Comparison
Word Error Rate (WER) is the standard benchmark: the percentage of words incorrectly transcribed. Lower is better.
| System | WER (Standard English) | WER (Accented/Non-native) | Technical Vocabulary |
|---|---|---|---|
| Windows Speech Recognition | ~12–18% | ~25–35% | Poor |
| Windows Voice Access | ~8–12% | ~18–25% | Limited |
| Whisper large-v3 (Groq) | ~2.7–4% | ~5–9% | Strong |
The accuracy difference is not subtle. At 15% WER, you get roughly one mistake per seven words - enough to require constant correction. At 3% WER, mistakes are occasional enough to mostly ignore during a first draft.
Whisper also handles non-native accents significantly better. This is a known weakness of the Windows built-in systems, which were primarily trained on American and British English voice data.
Latency Comparison
Latency is how long you wait after you stop speaking before the text appears. This matters enormously for flow. A 2-second wait breaks your thought. A 200ms wait feels like typing.
| System | Typical Latency | Architecture |
|---|---|---|
| Windows Speech Recognition | 500ms–1.5s | Local CPU inference |
| Windows Voice Access | 400ms–1.2s | Local CPU inference |
| Groq Whisper (dictate.app) | ~150–250ms | Cloud, Groq LPU hardware |
The Windows built-in systems run on your local CPU with a compressed model. The tradeoff for privacy and offline capability is latency. Groq runs in the cloud on custom silicon designed for fast inference - the same principle as a GPU but optimized for transformer models specifically.
App Compatibility
This is where the differences become practical. Windows Voice Access works well with Microsoft's own apps - Word, Outlook, Edge, Teams. Its integration with third-party apps is inconsistent.
Whisper-based tools like dictate.app work differently: they listen, transcribe, and simulate keyboard input. Because they use the clipboard and keyboard injection, they work in any app that accepts typed text - VS Code, Slack, Chrome, Notion, Obsidian, Notepad, Scrivener, anything. There's no application-specific integration required.
| App | Windows Voice Access | dictate.app (Whisper) |
|---|---|---|
| Microsoft Word | ✓ Good | ✓ Good |
| Outlook | ✓ Good | ✓ Good |
| VS Code | Unreliable | ✓ Works |
| Slack (desktop) | Unreliable | ✓ Works |
| Notion (desktop) | Unreliable | ✓ Works |
| Scrivener | No | ✓ Works |
| Terminal / PowerShell | No | ✓ Works |
When Windows Built-In Makes Sense
Windows Voice Access has legitimate advantages:
- It's free. If $8.99/month isn't in the budget, Voice Access is a real option.
- It's offline. No audio ever leaves your machine. If that's a hard requirement, local processing is the only answer.
- It has accessibility commands. Voice Access can navigate the Windows UI, click buttons, and control system functions - things Whisper dictation tools don't do.
If you need voice control of the operating system, Voice Access is the right tool. For pure transcription accuracy and speed, Whisper wins by a wide margin.
See the Difference for Yourself
dictate.app brings Groq Whisper to Windows. ~200ms latency, ~3% WER, works in every app. Try it free for 7 days.
Download dictate.app →No credit card · No account required · Privacy policy
The bottom line: if you're using Windows Voice Access and finding it accurate enough, stick with it - it's free. If you're frustrated by correction rate or the 1-second delay, trying a Groq Whisper tool for a week will make the difference immediately obvious.
Questions? Reach out at support@dictate.app or check the homepage for the full feature breakdown.