Osaurus

Osaurus is a native macOS (Apple Silicon) application that runs open models locally and can optionally call external cloud models; it is relevant if you want a local-first, open-source AI client for your Mac.

Quick Verdict

Osaurus appears to be an open-source, MIT-licensed native Swift app that runs open models entirely on Apple Silicon Macs while offering optional integrations with cloud models such as ChatGPT, Claude, and Gemini. This matters for users who prioritize keeping data local and want a single shared memory across models, but you should verify hosted-service dependencies and exact data flows on the official website before trusting privacy claims.

Key Features

• Native Swift build targeted at Apple Silicon macOS systems (the website describes a native macOS application).
• Runs open models on-device so "your data never leaves" the Mac, per the project claim; the site also notes optional external model integrations.
• Ability to add external cloud models (ChatGPT, Claude, Gemini) for tasks that need them, according to the project description.
• A single shared persistent memory that is carried across models, as described on the site.
• Distributed as open-source under an MIT license and free to download, with published Privacy Policy and Terms of Service dated June 15, 2026.

Who this is for

Best-fit users: macOS users on Apple Silicon who want an open-source, local-first AI client and are privacy-conscious about keeping model execution on-device. It also fits developers or tinkerers who prefer an MIT-licensed project.

Limitation / verify: the project also references hosted services and optional cloud models; the website does not clearly state exactly when data leaves the device or the technical protections used, so verify the hosted-service roles, encryption practices, and exact macOS/system requirements on the official site before deployment.

FAQ

Q: Is Osaurus free to use?
A: The site states the application is free to download and the project is open-source under an MIT license; confirm any paid tiers or services on the official site.

Q: Will my data stay on my Mac?
A: The project claims open models run entirely on-device and "your data never leaves" the Mac, but optional integrations with external models and references to hosted services mean you should verify data flows and the Privacy Policy for specifics.

Q: Which platforms are supported?
A: The project is described as native to macOS and optimized for Apple Silicon; the website does not clearly state other platform support or minimum macOS versions, so verify system requirements on the official site.