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Whisper is incredible at English. The question is what you give up to use it - and what happens when you give it German.

If you're building a tool yourself and ship audio to OpenAI's hosted endpoint, Whisper is hard to beat on raw accuracy for English. Sprachmemo is the choice if you don't want to wire transcription yourself, don't want a US data-processor in the loop, and primarily speak German. The two products serve different jobs.
Whisper is an API. To use it you write code, manage an API key, handle rate limits, store the transcripts somewhere, deal with audio formats, build a UI for your user. Sprachmemo is a finished app. To use it you tap a green circle. Comparing them is mostly a comparison of how much work you want to do. If the answer is 'I'm a developer and I'll happily do that work to integrate Whisper into something I'm building', Whisper is in a different category and we'd recommend it. If the answer is 'I want to record a voice note and read it back', Whisper isn't actually the product you want; you want a product built on top of something like Whisper or Vosk.
The German Vosk Large model is built on Kaldi acoustic models trained on hundreds of hours of clean and noisy German speech. For studio-quality input it's effectively indistinguishable from Whisper on common vocabulary. Where Whisper is meaningfully better is rare proper nouns and code-switched English-in-German speech (calling 'OpenAI' or 'Kubernetes' in the middle of a German sentence). We accept that gap deliberately - the audience that needs frequent code-switching also tends to be the audience that's OK shipping audio to an English-first vendor.
Free plan, no credit card. We host in Germany. You can export and delete everything self-serve.
| Ours Sprachmemo | Theirs OpenAI Whisper API | |
|---|---|---|
Surface | Browser app + transcription | API only - you build the UI |
Privacy posture | Audio on EU servers, no training | Audio to OpenAI US infra, OpenAI's policy applies |
German accuracy (clean studio audio) | Vosk Large: very good | Excellent |
German accuracy (noisy phone audio) | Solid | Strong |
Self-hosted option | We host it - or run the same Vosk yourself | Open-weights Whisper exists, but you have to run it |
Cost for 60 min/month | Free tier covers it | ≈ 0,36 USD via the API (audio only, no UI) |
Cost for 60 hours/month | Basis or Power tier | ≈ 21 USD via the API (audio only) |
Editable transcript + audio archive |