Tiune runs on open-source speech research and software. Here's what, by whom, and under which licenses.
Tiune itself is not open source, but almost everything underneath it is — the engine that recognizes your speech, the models that do the recognizing, the typefaces you're reading right now. The complete notice file, with the full text of every license, ships inside the app: Settings → Open source licenses → Full text. This page is the readable summary.
CrispASR, a C++ speech runtime built on ggml that began as a fork of whisper.cpp. Every word Tiune recognizes goes through it, on your own machine. MIT licensed, © 2023–2026 The ggml authors.
We build it from our own fork, which carries three patches: a streaming voice-activity entry point, a Metal teardown fix so quitting doesn't abort, and a Moonshine fix for a stale cached encoder graph. That fork is public, so the modified source is available to anyone.
CrispASR in turn carries its own open-source components — ggml, Mozilla's llamafile sgemm kernels, Arm's KleidiAI, glint, nlohmann/json, RNNoise, libogg, libopus, opusfile, OpenBLAS, and miniaudio. Each is credited with its full license in the notice file inside the app.
Every Whisper model OpenAI released is under those same MIT terms — unlike Moonshine, whose non-English models fall under a separate and more restrictive license. That is why Tiune bundles Moonshine's English base model only, and reaches for Whisper when it needs another language.
Tiune Turbo is Parakeet TDT 0.6B v2, © NVIDIA Corporation, trained with NVIDIA NeMo and released under the Creative Commons Attribution 4.0 International license.
Changes made to the original: the model was converted from the NeMo format to GGUF and quantized to q4_k by CrispStrobe. Tiune downloads that converted file unmodified and runs it through CrispASR. We make no further changes to the weights.
NVIDIA does not endorse Tiune, and this attribution does not suggest otherwise.
Tiune is set in Hanken Grotesk, © 2021 The Hanken Grotesk Project Authors, and Spline Sans Mono, © 2022 The Spline Sans Mono Project Authors. Both are licensed under the SIL Open Font License 1.1, and neither has been modified.
Tiune is a Tauri app — a Rust core with a web interface — and links roughly 600 Rust crates from the wider Rust ecosystem, overwhelmingly MIT or Apache 2.0. Every one of them is named, versioned, and licensed in the notice file inside the app, along with the full license texts.
A handful of those crates are licensed under the Mozilla Public License 2.0. Tiune uses them unmodified; their source is available from crates.io, and we'll send the corresponding source for any MPL-covered file we ship to anyone who asks.
Plus and Pro add two things that don't run on your machine, and neither is open source. Cloud transcription is ElevenLabs Scribe; the AI cleanup pass runs on Groq, serving OpenAI's gpt-oss-120b, an open-weight model under Apache 2.0. Billing is handled by Stripe, and accounts by Supabase.
What each of them may and may not do with what we send is on the Privacy page — that page is the one that matters, and this is only the credit.
If you maintain something Tiune uses and we've credited it wrongly, or not at all, tell us and we'll fix it: support@tiune.app.
Last updated 2026-08-20.