Osaurus is an open-source, Mac-only LLM server that lets users run AI models locally or connect to cloud providers like OpenAI and Anthropic, while keeping memory, files, and tools on their own hardware. Acting as an AI 'harness', it offers a consumer-friendly interface with a hardware-isolated sandbox for security. It supports models like Llama, DeepSeek V4, Gemma 4, and Qwen3, plus Apple's on-device models, and ships with 20+ native plugins for Mail, Calendar, Git, Browser, and more. As a full MCP server, it allows any MCP-compatible client to access local tools. The app has been downloaded over 112,000 times and the founders are exploring enterprise use cases in legal and healthcare sectors.
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