Comparison
Open Speech Studio is a free, open source alternative to Dragon NaturallySpeaking. Compare speech recognition, dictation, languages, platforms and privacy — factual and balanced.
Dragon NaturallySpeaking (Nuance, part of Microsoft since 2022) has been the established standard for desktop speech-to-text for decades. Dragon Professional typically costs €500-700 one-time, and there is a subscription variant (Dragon Anywhere) at around €15-20 per month. The software runs on Windows only, processes audio 100% locally, and has a strong reputation for dictation accuracy and industry-specific vocabularies (medical, legal).
Open Speech Studio from the OpenAEC Foundation is a free, open source speech recognition application built on Whisper AI from OpenAI. It runs cross-platform (Windows, macOS, Linux), processes audio 100% locally, and supports 99 languages out-of-the-box. License: LGPL-3.0. No subscription, no telemetry, no vendor lock-in.
Honest positioning: Dragon has decades of experience with dictation accuracy and industry-specific vocabularies (medical, legal) and extensive voice profile training. Open Speech Studio uses state-of-the-art Whisper AI, which performs excellently for general dictation, but is a younger project without the specialized industry dictionaries Dragon has built up over decades.
| Feature | Open Speech StudioOpenAEC Foundation | Dragon NaturallySpeakingNuance / Microsoft |
|---|---|---|
| Price | Free | ~€500-700 one-time or €15-20/month |
| License | LGPL-3.0 (open source) | Proprietary, commercial |
| Platforms | Windows, macOS, Linux | Windows only |
| Processing | 100% local (Whisper AI) | 100% local |
| Languages | 99 languages (Whisper) | ~5 languages |
| Keyboard shortcuts | CTRL+Win, CTRL+Shift+Space | Configurable |
| Meeting transcription | Real-time | Limited |
| Audio files (batch) | Batch + parallel processing | Yes |
| GPU acceleration | CUDA | Limited |
| Voice profile training | N/A (Whisper works out-of-the-box) | Extensive |
| Custom vocabulary | Whisper prompting | Extensive (medical, legal) |
| GDPR concerns | None — everything local | None — everything local |
| Monthly subscription | No | Yes (Dragon Anywhere) |
| Update frequency | Weekly (open dev) | Yearly |
| Telemetry | None | Optional / proprietary |
| Source code available | GitHub, public | Closed |
| 24/7 enterprise support | Community + commercial partners | Yes |
Download for Windows, macOS or Linux and experience Whisper AI speech recognition in 99 languages — local, private and without a subscription. No registration, no account, no telemetry.