Osaurus

What is Osaurus?

Osaurus is an open-source AI "harness" for macOS built natively in Swift (no Electron) that lets users create multiple AI agents, each with its own model, memory, and skills. It includes a native inference engine optimized for Apple Silicon for fully offline local models, or can connect OpenAI, Anthropic, or Gemini with a user's own API key while keeping memory and identity on-device.

Agents can watch folders, run scheduled research jobs, transcribe meetings, execute code in a sandbox, and browse the web with their own persistent browser and built-in search requiring no API keys. Osaurus also runs as a local server speaking OpenAI, Anthropic, and Ollama-compatible APIs, and as a full MCP server/client for tools like Cursor and Claude Desktop.

Key features

• Native Swift app for Apple Silicon with a built-in local inference engine
• Multiple independent agents, each with its own model, memory, and skills
• Agents browse the web with a persistent browser and built-in search (no API keys needed)
• On-device meeting transcription, code execution sandbox, and scheduled monitoring
• Doubles as an OpenAI/Anthropic/Ollama-compatible local server and full MCP server/client
• Free public URL per agent via an `agent.osaurus.ai` tunnel, no port forwarding needed

How to get started

1. Download and install the free Osaurus app on a Mac
2. Let it recommend a local model for your hardware, or connect a cloud API key
3. Create an agent, assign it a model, and give it memory and skills
4. Turn on browsing, scheduling, or code execution as needed per agent
5. Use it as a chat app, or point other tools at its local OpenAI-compatible server

Osaurus pricing

Osaurus for individuals is free and MIT licensed, with no subscription and no usage caps for local models; only optional hosted cloud inference is metered separately. A paid Workspaces tier adds sharing of agents and workflows across a team.

Our take: Being a native Swift app with its own Apple Silicon inference engine, not an Electron wrapper, makes it noticeably lighter and faster than most local-AI alternatives, with over 219k downloads and coverage from TechCrunch to prove real traction.

Prices verified 2026-09. Plans change often — confirm on the official site above before you buy.

Use cases

• Mac users wanting a fully private, offline personal AI assistant
• Developers wanting a local OpenAI/Anthropic-compatible server for testing
• Teams wanting different agents to use different models for data-sensitivity reasons
• Tinkerers running open local models optimized for Apple Silicon

Osaurus vs. alternatives

FAQ

Is Osaurus free to use?

Osaurus's plans: Free & open-source (MIT); Workspaces plan adds paid team features. Pricing and free-tier limits change over time, so check the official site above for the latest details.

What is Osaurus used for?

A free, open-source native macOS app that runs AI agents locally on Apple Silicon, with memory, browsing, and code execution that never leaves your Mac.

Who is Osaurus best for?

Osaurus is a good fit for mac users wanting a fully private, offline personal AI assistant, or developers wanting a local OpenAI/Anthropic-compatible server for testing.

What are the alternatives to Osaurus?

Commonly compared alternatives include AnythingLLM, Raycast AI, and ZeroClaw, see the comparison above for how they differ.

How much does Osaurus cost?

Osaurus is completely free for individual use, including local models — there's no subscription or usage cap. The only cost is optional: cloud model usage if you connect your own API key, or a paid Workspaces plan for team sharing features.