Juno

What it does

Juno is a free, open-source voice writing app for Mac that provides live transcriptions and clean text output. It runs entirely on-device after an initial model download, requiring no internet connection for everyday dictation. Users press a shortcut, speak naturally, and Juno transcribes in real time, filtering out filler words, false starts, and corrections. It can also rewrite selected or recent text based on plain English commands (e.g., "make this warmer"), expand voice snippets, and create Apple Notes, Reminders, and alarms via the "Hey Juno" action phrase. The app works across most Mac text fields, including Mail, Slack, Notes, and Cursor.

Who it is for

Juno is designed for Mac users who write frequently and want to dictate text hands-free without sacrificing privacy or paying a subscription. It suits professionals, writers, developers, and anyone who prefers speaking over typing. The app requires an M2 or newer Apple Silicon Mac running macOS 15 Sequoia or later with at least 24 GB RAM. It is ideal for users who value local processing, open-source software, and a free, no-account-required tool.

Why it matters

Voice dictation tools often rely on cloud processing, require subscriptions, or lack live transcription and cleanup features. Juno addresses these gaps by offering a fully local, private, and free alternative. Its live HUD transcript and AI-powered cleanup reduce editing time, while native actions (Notes, Reminders, alarms) and in-place rewrites streamline workflows. By being open-source and offline-capable, Juno gives users control over their data and avoids vendor lock-in. The comparison table on the website shows Juno outperforms Apple Dictation, Wispr Flow, Superwhisper, and Aqua Voice on features like live transcript, cleaned writing, snippets, native actions, and rewrites—all at no cost.

Launch signal

Juno launched on Product Hunt on the day of this profile, promoted as a featured product. The website prominently displays a "Download for Mac" call-to-action and links to GitHub, docs, and a blog. The Product Hunt listing describes it as "Free, local AI powered Voice to Text w/ live transcriptions" and notes 151 followers. The founder is Jas Jaski, and the project is part of Cassini Research. The launch appears to be the initial public release, with the app available for immediate download.

Brand and naming

The name "Juno" is short, memorable, and evokes the Roman goddess of protection and counsel—fitting for a tool that acts as a personal writing assistant. The branding emphasizes simplicity, privacy, and freedom: the tagline "Press a key. Talk. Juno types it." and the repeated phrases "local," "private," and "free forever" reinforce the core value proposition. The visual design uses a clean, minimal interface with a dark HUD and app icons, aligning with the Mac ecosystem. The open-source and no-account stance positions Juno as a trustworthy, user-centric alternative to commercial dictation tools.