One workspace.
Multiple models.

Work with multiple AI models, compatible agents, and connected tools in one open-source workspace. Choose how you work with AI, on your terms.

Download for macOS

Free to start. No credit card. v1.1.4

Take a look around

Claude

Help me turn a big idea into a clear plan.

Let’s make it something you can act on.

Find the coreWrite down the problem and who you want to solve it for.
Start smallChoose one useful thing you can build and test this week.
Make it realShare it early. Let what you learn shape the next version.

Example response

Where do you want to take this?

Tools

Cloud model · Requests go to your selected provider

At home on
your desktop.

Chat history stays on your device. Not on our servers.

How privacy works

Find your flow.

Your models, together.

Connect the providers you use. Keep the workspace you love.

OpenAI

Anthropic

Gemini

xAI

Groq

Mistral

DeepSeek

Perplexity

Cohere

LM Studio

HuggingFace

Moonshot

Ollama

Custom

Local by design.
Yours by default.

Cosmo is an open-source, cross-platform workspace that keeps your conversations on your device and lets you choose how you connect to AI.

Set up your workspace

Your connection, your choice

Ollamalocalhost:11434

Local

LM StudioYour local model server

Local

Your API keysConnect directly to a cloud provider

Chat history lives on this device.

Local storage isn’t the same as local inference. Cloud prompts go to the provider you choose, under its privacy policy. Use a local model to keep prompts on your machine.

The full privacy picture

Models, agents, and tools. One place.

Bring together the AI models, agents, and tools you use for code, research, and everyday work.

Give your AI more context.

Connect MCP servers so your model can work with external tools and live data, not just the words in your prompt.

MCP connections

Tools from your servers

Tool callRead project context

Bring the right information into the conversation.

Context added to chat

Agent workspace

A space for your agents.

Install from the ACP registry.
Start a dedicated conversation.

Agent Client Protocol

Meet your local agents.

Install compatible ACP agents and give each one a dedicated workspace. Keep agent conversations right alongside your chats.

Stay in the flow.

Reach for slash commands without leaving your conversation. See model thinking, track tokens per message, and stop a response whenever you need.

/ Commands

Thinking & token insightsUnderstand each response.

Markdown, code highlighting, and a workspace that gets out of your way.

Next on the horizon.

In development. Not available yet.

Web Search
Workflow Automation
Cost Intelligence
Code Execution

Explore all features

Cost Intelligence in development

The real cost
is getting work done.

Developers can see what a model charges, but not what it costs to get work done. The cheapest model may need multiple attempts, or an agent can get stuck in a loop and consume resources without making progress.

Track cost by task.

See what it costs to get a piece of work done across models and agents.

Catch wasted spend.

Flag retries, redundant context and agent loops that waste resources without progress.

Choose the right model.

Get recommendations based on both cost and performance for the task at hand.

Get more done for less.

Help people get more work done with AI while spending less.

Start free.
Stay in control.

Bring your own keys, not another AI subscription. Pick the workspace that fits how you work.

A little clarity.

Cosmo is your workspace. Model usage is billed separately by your cloud provider. Local models run on your hardware.

Community

Freeforever

Community is the home for Cosmo’s complete AI workspace: models from multiple providers, local AI, MCP tools, ACP agents, personas, commands and much more

Download Community

Professional

Coming soon

Good questions.

Read the full FAQ

Is my data private?

Chats are stored on your device. When you use a cloud model, your prompt is sent to the provider you selected under its own privacy policy; local models can run on your machine.

Do I need to pay for API keys?

Which AI providers can I use?

Is there a mobile app?

Can I sync my chats across devices?

Make room for
better work.

One desktop app. Your choice of AI.
A workspace that stays yours.