Key differences
Superwhisper goes from voice to text. Alter goes the other way, taking voices or text and producing audio. Different categories of product that share a search result.
| Superwhisper | Alter | |
|---|---|---|
| Category | Speech-to-text (dictation) | Voice transformation, text-to-speech |
| Core use case | Talk, get written text | Change how a voice sounds, generate speech |
| Platforms | macOS, Windows, iOS | Windows (Mac beta for real-time only) |
| Offline mode | Full offline support | Unclear |
| Privacy | On-device, audio never leaves machine | Cloud processing for some features |
| Languages | 100+ | Multiple (voice cloning) |
| AI modes | Super, Voice, Email, Message, custom | Voice morphing, voice cloning, TTS |
| Pricing | Free, Pro from $8/mo | Free tier, paid from $30/mo |
Key differences
Opposite ends of the same pipeline
Superwhisper goes from voice to text. You speak, it writes. It runs locally on your device, supports 100+ languages, and works system-wide in any app. The AI modes can reformat your speech into polished emails, messages, or code comments.
Alter goes the other direction. It takes existing voices or text and produces modified audio output. Voice cloning, real-time voice changing for streams, speech-to-speech morphing. It's a production tool for audio content.
Who each product is for
Superwhisper is for people who want to type less. Developers dictating into Cursor, writers drafting long-form content, anyone who thinks faster than they type. It replaces your keyboard for text input.
Alter is for audio and media professionals. Game developers who need character voices, podcasters cleaning up audio, streamers who want real-time voice effects.
Where Alter does well
If you actually need voice transformation, Alter is capable. Their speech-to-speech tech lets you change a voice recording to sound like a different person, and the voice cloning feature can replicate a specific voice from a short sample. For game studios and media production teams that's useful, just not what Superwhisper does.
What people say
Guillermo Rauch
Superwhisper delivers on the dream of an AI-native operating system. The best part: it's insanely fast and does just what you expect.
Pieter Levels
Tried @superwhisperapp today. Very nice. Lets me talk to Cursor and then it codes for me, just gets it right.
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