Bring your own model
Use supported local runtimes or connect the providers you already trust. Switch models and thinking modes for each task without rebuilding your workspace.
THE DESKTOP HARNESS FOR OPEN MODELS
Open-source AI, ready for real work.
MountainDesk Harness gives open models a complete desktop workspace: tools, agents, documents, automations, schedules, notes, and shared project context in one focused application.
€0Non-commercial use
Local-firstYour models, your machine
Windows + macOSNative desktop workflow
More than a model runner
One of the most capable desktop harnesses for open-source models.
A capable model needs more than a chat box. MountainDesk connects it to the working folders, tools, memory, and repeatable workflows that turn an answer into completed work—while keeping you in control.
Tools that complete the job
Give models controlled access to coding, files, browsers, documents, and purpose-built tools. MountainDesk keeps actions visible and projects organized.
Agents and repeatable flows
Build agents for specialized work, save task state, schedule recurring jobs, and turn successful processes into reusable automation.
Project context that stays useful
Keep working folders, conversations, notes, documents, and tasks together so every model starts with the context needed for the work at hand.
Human control by design
Review activity, steer a running task, cancel execution, and choose exactly which tool groups are available. You remain the operator.
Private, desktop-first work
Run open models on your own hardware and keep project material on your computer. Cloud providers remain optional when your workflow needs them.
A workspace built around the operator
See the whole job, not only the last prompt.
Projects stay visible beside the conversation. Model, agent, flow, and tool controls remain close at hand. Results, files, and execution details are presented in the same working view.
- Separate projects and task history
- Model, provider, and reasoning controls
- Live execution with steering and cancellation
- Saved state, schedules, notes, and shared workspace
Private AI for serious work.
From model to teammate
Set up once. Work your way.
Connect a model
Choose a local or cloud provider and select the right model for the task.
Open a project
Attach a working folder and keep its tasks, files, and history together.
Give it tools
Select the capabilities the model can use and stay in control as it works.
Save what works
Turn a successful task into a reusable agent, flow, or schedule.
START BUILDING WITH OPEN MODELS
Download MountainDesk Harness.
Free for personal and non-commercial use. Choose your desktop platform and put your open-source models to work.
✓ Commercial use requires a MountainDesk business license.