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AI app for Windows · Windows 10 & 11
Give AI a place on your Windows desktop. Connect your own API keys, choose the provider you want, and keep your conversations stored on your PC.
24-hour trial · $250 one-time license
Cloud API usage billed separately. Local models use your hardware.
MultipleChat AI On your PCsk-••••••••••••sk-ant-••••••••AIza••••••••••On your machineYour choice of models. Your conversations stored locally.
Illustrative provider setup.
Take a closer look
Connect the models you want in one desktop app. Choose cloud AI with your own API keys, or connect a model running on your computer.
Your computer. Your own API keys. · Illustrated walkthrough; screens are simplified.
Choose where your AI runs
The app lives on your computer. Where the model runs is up to you.
Add an API key from OpenRouter, OpenAI, Anthropic, Google Gemini, Mistral or another supported provider. Choose a default model and change it for each workspace.
Connect Ollama or LM Studio to use a model on your own hardware. Local chat and document indexing can work without a cloud provider.
Local AI and cloud AI are different: cloud requests leave your computer. Local workflows can run offline after setup; a licensed copy checks in online at least every 14 days.
Windows installation
The Windows .exe installs a desktop app with local storage and your choice of AI provider.
Version 1.0 · Windows 10/11 · 64-bit
Windows and Mac releases may differ in features.
Have your API key or local model ready before clicking Start trial. Your 24 hours begin at that point. A consumer AI subscription does not automatically include API credit.
Open Settings → System → About. The current installer is for 64-bit Windows 10 or Windows 11. The Windows release is version 1.0; it is separate from the Mac release.
Download the .exe from this page, run the installer and follow its prompts. Launch MultipleChat AI from the Start menu when installation is complete.
Have an API key or a local model ready before starting the trial. Open Settings → AI Providers → LLM, choose your provider and model, and save. Then create a workspace and send a message.
Your desktop app license
Try MultipleChat AI Desktop on your own computer before buying. Your license key arrives by email.
No recurring app subscription. Cloud model usage is billed separately by your provider.
Before you download
Yes. The current Windows version 1.0 supports 64-bit Windows 10 and Windows 11. Download the .exe installer and follow the setup prompts.
Cloud providers run their models on their own infrastructure, so you do not need to run those models on your PC. Local models use your own hardware; 16 GB RAM or more is recommended, and requirements depend on the model.
Windows is currently version 1.0, while Mac is version 2.0.0. Features can differ between releases. Use the 24-hour trial to check your intended workflow on your own PC.
Create an API key with a supported provider and add it in Settings → AI Providers → LLM. The app connects directly to that provider using your key. API usage is billed to your provider account separately from the app license.
Your chat history, documents, local document index and API keys are stored on your computer. When you choose a cloud model, your prompt and any relevant document passages are sent to that provider under its terms. No MultipleChat server sits between your app and the model provider.
Yes. Connect a local model through Ollama or LM Studio. Local chat and document indexing can run on your computer without cloud API usage charges. Model performance depends on your hardware. A licensed copy needs an online check-in at least every 14 days; web search and cloud models also need an internet connection.
Try the app for 24 hours. The trial starts when you click Start trial, so prepare your API key or local model first. A license costs $250 as a one-time purchase. Cloud API usage is charged separately by your provider. Local models use your own hardware without per-token provider fees.
No. MultipleChat AI Desktop is a separate, single-user product using your own API keys or local models. The web subscription and web-only features, including the Studios and AI Collaboration, are separate.
Your license key is emailed to the address you use at checkout. Enter it under Settings → License. If the email does not arrive, check your spam folder or contact [email protected].
Need help connecting your AI? Read the setup guide or contact support.
Your providers. Your desktop.
Connect OpenRouter or a direct provider account. Each guide shows which key to use, how to choose a model, and where your requests go.