Osaurus
A free, open-source Mac app that runs AI chatbots and agents entirely on your own computer, with nothing ever sent to the cloud.
🔗 Visit Osaurus
Description
Most AI chat apps send everything you type to a company's server somewhere, which is fine until you'd rather your notes, questions, or files never leave your own laptop. Osaurus is a Mac app that runs AI models directly on the machine itself — think of it as having a private, offline version of a chatbot that works even with no internet connection, and costs nothing because there's no subscription behind it.
Osaurus is a native macOS application, built for Apple Silicon, that runs local language models via Ollama, MLX, or LM Studio, while also optionally connecting to cloud services like ChatGPT, Claude, or Gemini when a user wants them. Beyond chat, it supports building autonomous agents with file read/write access, tool execution, voice control, and folder monitoring, plus a shared-memory layer that keeps context consistent across different models. It's MIT-licensed and installable via `brew install osaurus`, with no telemetry, no usage caps, and no billing of any kind.
💬 Our review
The short version: if you have a Mac with Apple Silicon and want to run AI models locally without paying a subscription or sending your data anywhere, Osaurus is a genuinely free, no-catch way to do it.
What sets it apart from just installing Ollama directly is the extra agent layer on top — file access, tool execution, voice control, and a shared memory system that keeps different local and cloud models on the same page. That's real added value for someone who wants more than a chat window. The honest tradeoff: it's Apple Silicon only, so there's no path for Windows or Intel Mac users, and getting real mileage out of it still requires downloading and managing models yourself, which is more setup than a hosted service like ChatGPT. Compared to Ollama or LM Studio, which mainly focus on running models, Osaurus's agent and automation features are the differentiator — worth it if privacy and local control matter to you more than convenience.
📊 Global score
🤖 AI-enriched data
100% gratuit, licence MIT, aucun abonnement, aucune limite d'usage, aucune télémétrie.
Pros
Totalement gratuit et open-source (MIT)
Fonctionne 100% hors-ligne, aucune donnée envoyée à un serveur
Couche agent (fichiers, outils, voix) au-dessus du simple lancement de modèle
Mémoire partagée entre modèles locaux et cloud
Cons
Réservé à macOS sur puce Apple Silicon — aucun support Windows/Linux
Nécessite de télécharger et gérer les modèles soi-même
Communauté plus petite que les alternatives web grand public