The best AI assistant for Windows depends on where you want the AI to run. One option is built into Windows itself, several are desktop apps you install, several run open models locally on your own PC for privacy, and one is a dictation tool rather than a chat assistant. Ten follow in no particular order.
Windows users have more choice than the browser tab most people start with. You can call up an assistant with a key press, install a desktop app that sits beside your work, or run a model on your own hardware so nothing leaves the machine.
The ten below are listed alphabetically, in no particular order, and each description comes from the developer's own download or product page, read as of Nov 2026. Every one of them names Windows on that page.
Windows AI apps compared
| Tool | Type | Good for |
|---|---|---|
| AnythingLLM | On-device assistant | A private assistant on your own PC |
| Chatbox | Multi-model chat client | Several AI models in one app |
| Claude | Desktop app from Anthropic | A desktop app for Windows |
| GPT4All | Private local chatbot | Offline chat with no cloud |
| Jan | Open source assistant | A local assistant on your desktop |
| LM Studio | Local model app | Trying open models on your PC |
| Microsoft Copilot | Assistant built into Windows 11 | Launch it by key or by voice |
| Monica | All-in-one assistant across devices | Chat, writing and research |
| Ollama | Local model runner | Open models from the command line |
| Wispr Flow | Voice dictation tool, not a chat assistant | Speaking instead of typing |
Ten AI assistants you can run on a Windows PC
AnythingLLM
Best for: Keeping documents and chats on your own computer, with one app for Windows, macOS and Linux and a meeting assistant built in.
Chatbox
Best for: Chatting with several AI models in one desktop app, with a 64-bit download for Windows 10 or later.
Claude
Best for: A desktop app with standard and Arm 64 Windows downloads, plus a Microsoft Store listing and enterprise installers.
GPT4All
Best for: A private chatbot that runs on your device with no cloud needed, with downloads for Windows and Windows ARM.
Jan
Best for: Downloading an open source assistant for your desktop, with Windows x64 and ARM64 builds.
LM Studio
Best for: Experimenting with open models on your own computer, with a Windows install command and downloads for Mac and Linux too.
Microsoft Copilot
Best for: Calling up help with the Copilot key, Windows key + C or by voice, with the Copilot app also in the Microsoft Store.
Monica
Best for: Chat, search, writing and translation across leading AI models, from your browser, desktop or phone.
Ollama
Best for: Running open models locally, with a Windows download and a PowerShell install command.
Wispr Flow
Best for: Dictating into any app instead of typing, with a notetaker also available on Windows and Mac.
Built in, installed app or local model on your own PC?
Microsoft's Windows 11 page says you can launch its assistant 'by pressing the Copilot key or Windows key + C' or by saying 'Hey, Copilot', so it's part of Windows itself. Claude's download page lists 'Windows (arm 64)' and 'Microsoft Store', Chatbox has a 'Windows 64-bit' download, Monica 'Supports Windows & Mac', and Wispr Flow is 'Available on Mac, Windows, iPhone, and Android'. Those are apps you install that work alongside the rest of your desktop.
GPT4All offers 'Download for Windows ARM', AnythingLLM calls itself 'A private AI assistant that runs entirely on your computer', Ollama's download page is built for Windows and says it 'runs open models in two ways', LM Studio's download page names Mac, Linux and Windows, and Jan is an 'Open-Source ChatGPT Replacement' with a 'Windows x64' download. These run models on your own PC.
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That's the split a Windows user wouldn't guess: one assistant is part of Windows itself, four are apps you install, and five run models on your own hardware, where your chats don't have to leave the machine.
Local AI on Windows: what your PC needs
Running a model locally means your own processor, memory and graphics card do the work. Small models run on an ordinary laptop, while bigger ones want plenty of RAM and a capable GPU, and they'll be slower than a cloud service on modest hardware. The trade is privacy and offline use: your prompts and documents stay on your machine.
Check whether your PC is x64 or Arm before you download, because several of these offer separate builds for each. Open Settings, then System, then About, and the system type is listed there.
Choosing by the job you want done on your desktop
- Quick help while you work. An assistant built into Windows is already there, with a key to call it up, so it's the easiest place to start.
- Writing, research and files. A desktop app from an AI company gives you its models in a window beside your work, and some list connectors and extensions on their pages.
- Several models in one place. Multi-model clients let you switch between AI models without juggling browser tabs.
- Privacy and offline use. Local model apps run open models on your own PC, so nothing has to go to the cloud.
- Talking instead of typing. A dictation tool turns speech into text in any app. It isn't a chat assistant, but it's quick for emails and notes.
Do you make an AI assistant for Windows? Tool makers can ask to be considered for a featured place on this list.
My advice for picking a Windows AI assistant
Start with what's already on your PC and see how far it gets you. If you want a stronger writing or research partner, add one desktop app. If privacy matters or you work offline, try a local model app, starting with a small model so you can see how your hardware copes. And if you spend your day typing, try dictation before you try anything else.
Once you've picked one, my Copilot prompts give you a head start, and my guide to AI assistants versus chatbots for business tasks explains which suits which job.
Want your tool on this list? Featured spots and reviews here are paid partnerships. Here's how to partner with me.
Frequently asked questions
Does Windows have a built-in AI assistant?
Yes. Windows 11 includes Copilot, which Microsoft says you can open with the Copilot key, Windows key + C or by voice. You can also install other assistants alongside it.
Can I run an AI assistant offline on Windows?
Yes, with a local model app. Several tools here download open models to your PC and run them there, so they work without an internet connection once the model is installed.
Is a local AI assistant private?
Running a model on your own PC keeps prompts and documents on your machine, which is the main reason people do it. Read each app's privacy policy anyway, especially for any cloud features it adds.
Do AI assistants work on Windows on Arm?
Several do. Some of the tools here offer separate Arm downloads for Windows, so check the download page for an Arm or ARM64 build before you install.
What hardware do I need for local AI on Windows?
Small models run on most modern laptops. Larger models need more memory and ideally a dedicated graphics card. Start small and move up if your PC copes.
Are there free AI assistants for Windows?
Several tools on this list name a free download, free plan or open source edition on their own pages, as of Nov 2026. Check the developer's site for current limits.
