In short
Select text, press Alt+1 and ask Zack KI your question. Insert the answer back into the original app. No Copilot+ PC required.
Copilot and Zack KI side by side
| Microsoft Copilot on Windows | Zack KI | |
|---|---|---|
| Open | Copilot key or Win+C, full app or quick view | Alt+1 from any program; Alt+2 for an empty chat |
| Selected text as context | Click to Do on Copilot+ PCs; smart text actions need English as the default language | Alt+1 attaches the selection from Word, Outlook, browsers and most other programs |
| Answer back into your app | Not documented for the Copilot app | Insert button puts a text block at the cursor or replaces the selection |
| Screenshots | Yes, via “Take a screenshot” | Alt+1 with nothing selected starts a screen capture |
| Files | Finds and reads local and OneDrive files | PDF, Word, Excel, PowerPoint, images and text files from Explorer |
| Own API key or local model | Not documented | OpenAI, OpenRouter, Groq, Mistral, Ollama or LM Studio |
| Hardware | Click to Do needs a Copilot+ PC | Any Windows 10 or 11 PC |
Provider sources, 17 October 2026: Microsoft: Copilot app on Windows, Microsoft: Click to Do. We develop Zack KI.
Fewer steps with Zack KI
Alt+1 picks up selected text from Word, Outlook, browsers and many PDF viewers. Alt+3 improves text; Alt+4 corrects it in place.
Supported apps and limitations
Microsoft 365 and Outlook
Microsoft 365 Copilot can access your organisation’s mail, documents and meetings. Zack KI uses your selection and attachments, regardless of your Office plan.
Related questions
Can I use Zack KI and Copilot on the same PC?
Yes. They use different shortcuts. If another app already uses Alt+1, Zack KI reports the conflict and you can choose another key under Shortcuts in the settings.
Does Zack KI run on Mac or Linux?
No. Zack KI is a Windows app for Windows 10 and Windows 11.