Open Source Licences

Last updated September 9, 2026

What this page covers

Stroki includes open-source software and open speech-recognition models. Their licences require us to credit their authors, so this page does that.

The Mac app and the iPhone app download different models. Both are listed here. NVIDIA, OpenAI, FluidInference, and Argmax do not endorse Stroki.

Stroki for Mac — speech models

Fast uses NVIDIA Parakeet TDT-CTC 110M, licensed under CC BY 4.0. The Core ML conversion is published by FluidInference.

Classic uses OpenAI Whisper base.en via WhisperKit (MIT License).

Accurate uses NVIDIA Parakeet TDT 0.6B v3, licensed under CC BY 4.0. The Core ML conversion is published by FluidInference.

Multilingual uses OpenAI Whisper large-v3-turbo via WhisperKit (MIT License).

Live transcript uses NVIDIA Parakeet Realtime EOU 120M, licensed under CC BY 4.0. The Core ML conversion is published by FluidInference.

Each model downloads to your Mac the first time you select it, and runs on Apple’s Neural Engine. Audio never leaves the device.

Stroki for iPhone — speech model

Stroki for iPhone transcribes with NVIDIA Parakeet TDT 0.6B v2, licensed under CC BY 4.0. The app downloads it to your iPhone on first launch and runs it there.

The model has been modified: we use the Core ML conversion published by FluidInference, which repackages NVIDIA's weights to run on Apple silicon.

Apache License 2.0

The following components are licensed under the Apache License, Version 2.0.

  • FluidAudio — FluidInference
  • text-processing-rs — FluidInference
  • Google Sign-In for iOS — Google, together with the libraries it depends on: AppAuth-iOS, GTMAppAuth, GTMSessionFetcher, GoogleUtilities, and Promises

Each is used unmodified. None of them ships a NOTICE file.

MIT License

WhisperKit — Copyright (c) Argmax, Inc.

RevenueCat — Copyright (c) 2024 RevenueCat, Inc.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Something missing?

If you believe a component is used here without proper attribution, email hello@stroki.ai and we will correct it.