Core focus
Superwhisper: voice-to-text, local Whisper-based transcription, multi-language. Jarvis: voice-to-text plus voice-to-action, with app control and AI workflow chaining.
Pricing
Superwhisper: $8.49/month or $84 lifetime. Jarvis: free, open source.
Local processing
Both run fully local with no cloud round-trip. Superwhisper uses Whisper.cpp variants; Jarvis uses optimized models tuned for low latency on Apple Silicon.
Multi-language
Superwhisper supports 100+ languages. Jarvis supports 30+ today and is expanding rapidly. For pure transcription in less common languages, Superwhisper edges ahead. For English + top 30 languages plus app control, Jarvis wins.
Verdict
If you only need transcription and use a long-tail language, Superwhisper. If you want a free, open-source voice assistant that can both transcribe and act, Jarvis.