Credits & Open-Source Licenses

Callipso is built on the shoulders of exceptional open-source projects. We're grateful to every contributor whose work makes this possible.

Speech Recognition

The models and runtime that power Callipso's on-device voice transcription.

Parakeet TDT 0.6B v3by NVIDIA Corporation
CC-BY-4.0

State-of-the-art automatic speech recognition model. Callipso uses this for on-device voice transcription.

CoreML-optimized conversion of the Parakeet model for Apple Neural Engine acceleration.

FluidAudioby FluidInference
Apache 2.0

Swift SDK for frontier CoreML audio models — speech-to-text, voice activity detection, and speaker diarization.

Infrastructure

Core frameworks and libraries used in the desktop app.

Electronby Electron contributors & GitHub Inc.
MIT
wgpuby wgpu contributors
Apache 2.0 / MIT
xterm.jsby The xterm.js authors
MIT
better-sqlite3by Joshua Wise
MIT
Expressby TJ Holowaychuk & Douglas Christopher Wilson
MIT

Services & SDKs

Third-party services integrated into Callipso.

Supabaseby Supabase Inc.
MIT
Stripeby Stripe Inc.
MIT
Sentryby Functional Software, Inc.
MIT
PostHogby PostHog Inc.
MIT

Website

Technologies powering callipso.dev.

Next.jsby Vercel Inc.
MIT
Reactby Meta Platforms, Inc.
MIT
Tailwind CSSby Tailwind Labs Inc.
MIT
Framer Motionby Framer B.V.
MIT
Lucideby Lucide contributors
ISC

This page lists the primary open-source dependencies. Callipso also uses numerous transitive dependencies — their licenses are included in the application bundle. A machine-readable NOTICES file ships inside every Callipso release. If you believe any attribution is missing or incorrect, please contact support@callipso.dev.