Offline Dictation Software — No Cloud, No Internet Required
100% on-device speech-to-text for macOS and Windows. Your audio never leaves your laptop.
SuperSpeech performs every transcription locally — on the Apple Neural Engine on Mac or your GPU/CPU on Windows. There is no cloud API, no audio upload, and no account required after activation. The only network call the app ever makes is a periodic license heartbeat that transmits a hashed hardware ID, not audio or text.
Why offline matters
Cloud dictation services upload your microphone stream to servers owned by someone else. That means your voice passes through infrastructure you do not control, gets logged by default, and may be used to train future models unless you specifically opt out. For lawyers, doctors, researchers, and anyone handling sensitive information, that is an unnecessary risk.
- Attorney-client, doctor-patient, and source-reporter privilege preserved
- GDPR and HIPAA compliance becomes trivial — no data processor to vet
- Works on planes, in SCIFs, and on air-gapped networks
- No latency spikes from slow connections or API rate limits
- License heartbeat is the only network call (hashed HWID, no content)
How the local inference pipeline works
On Mac, SuperSpeech uses the Parakeet-TDT-0.6B-v3 model compiled for Core ML, which runs on the Apple Neural Engine. On Windows, the same model runs via ONNX Runtime with an execution provider cascade: CUDA for NVIDIA GPUs, TensorRT for extreme performance on RTX cards, DirectML for iGPUs, and CPU INT8 as a fallback.
Model download is one-time
On first launch, SuperSpeech downloads the ~600MB Parakeet model from our CDN. After that, no model updates are mandatory. You can also pre-bundle the model for fully air-gapped deployment (enterprise plans).
Performance: faster than cloud
Because there is no network round-trip, offline dictation is often faster than cloud. A 30-second audio sample transcribes in under 1 second on M-series Macs and 1-2 seconds on modern Windows. Cloud services like Otter and Rev typically add 2-5 seconds of round-trip time alone.
Frequently Asked Questions
Does SuperSpeech work completely offline?
Yes, after the initial model download. All audio and transcripts stay on your device. The only network call is a periodic license heartbeat that transmits a hashed hardware ID.
What about the model download?
The Parakeet model is ~600MB and downloads once on first launch. After that, no internet connection is required for transcription.
Is there a way to verify nothing is uploaded?
Yes. Block superspeech.live in your firewall after activation — transcription continues to work. You can also use Little Snitch (Mac) or Fiddler (Windows) to monitor network calls.
Does this work on Apple Silicon and Intel Macs?
Both. Apple Silicon (M1-M4) uses the Neural Engine for best performance (~1s latency). Intel Macs use CPU/GPU and run slightly slower (2-3s).
What about air-gapped environments?
Enterprise plans support pre-bundled models with no CDN dependency. Contact sales for air-gapped deployment instructions.
Try offline dictation
30-day money-back guarantee. No account required after activation.