9 Best AI Assistants for Windows in 2026
Windows is where most professional work happens, and the AI landscape on it is shifting fast. Copilot is baked into the OS and Microsoft 365, and Microsoft just launched Scout, an executive-assistant-style AI that shows up on email and calendar like a coworker. But “AI assistant” still splits into two needs: something that answers and drafts, and something that actually runs your work. Here are nine ranked for Windows.
1. Carly
Carly is an AI agent platform where each agent has its own real email address. It works from any Windows PC through your inbox, with nothing to install. CC it on a thread and it replies, books meetings, and updates your tools across 200+ integrations, and it works natively with Outlook and the Microsoft stack.
Why it’s #1: Copilot and Scout assist inside Microsoft’s walls. Carly takes action across your whole stack (CRM, calendar, project tools, accounting) and sends as its own address instead of drafting. Starts at $35/month.
Best for: Windows professionals who want an assistant that does the work across every tool, not only Microsoft 365.
2. Microsoft Copilot
AI built into Windows, Outlook, Word, Excel, and Teams. It drafts, summarizes, and pulls context from your Microsoft 365 graph.
Best for: Teams standardized on Microsoft 365.
3. Microsoft Scout
Microsoft’s new executive-assistant AI that appears on internal email and calendar like a helpful employee, the freshest entry in the category.
Best for: Microsoft 365 orgs wanting a built-in EA layer.
4. ChatGPT for Windows
The native desktop app with a global hotkey and voice, the versatile everyday assistant for drafting and answers.
Best for: Everyday drafting, research, and analysis.
5. Claude
Strong at long-form writing, careful reasoning, and working through documents and code, available on the web and desktop.
Best for: Writing and reasoning over long material.
6. Power Automate
Microsoft’s automation tool for connecting apps and automating repetitive Windows and Microsoft 365 workflows, with AI steps.
Best for: Automating Microsoft-stack workflows.
7. Perplexity
A sourced AI answer engine for research you can cite, with a Windows app.
Best for: Sourced research on the desktop.
8. Notion AI
A cross-platform workspace for notes, docs, and projects with AI drafting and summarization.
Best for: Organizing notes and documentation.
9. Google Gemini
If you straddle Windows and Google Workspace, Gemini brings AI into Gmail, Docs, and Calendar.
Best for: Windows users on Google Workspace.
How to choose
If you live in Microsoft 365, Copilot and the new Scout are the natural built-ins. For answers and drafting, ChatGPT or Claude. For the actual workload (email, scheduling, and follow-through across all your tools, not only Microsoft’s), Carly does the work and plays nicely with Outlook.
FAQ
Is Microsoft Copilot enough on its own? For drafting and summarizing inside Microsoft 365, often yes. But Copilot stays within Microsoft’s apps. For action across your CRM, calendar, and other tools, Carly covers what Copilot doesn’t.
What’s the best AI assistant for Outlook on Windows? Carly works natively with Outlook and acts on threads. See our full best AI tools for Outlook users breakdown.
More: Best AI tools for Outlook users · Best AI assistant for Outlook email · Best AI assistant apps · Best AI personal assistants
Ready to automate your busywork?
Carly schedules, researches, and briefs you—so you can focus on what matters.
See what people say
"Before Carly, I relied on a Calendly link, but the whole process felt impersonal and not very professional. Carly changed that by handling all the back-and-forth, so I'm no longer stuck in endless email threads trying to line up schedules.
Now Carly reaches out to candidates, shares my real-time availability, lets them pick a slot, then sends a Zoom link and drops it straight into my calendar. She sends reminders to both of us before each call, which has significantly reduced no-shows and last-minute confusion.
On top of scheduling, Carly acts like a full executive assistant, sending me my schedule the night before so I can prepare for each call. It reminds me of the old x.ai assistant, but Carly is noticeably smarter, faster, and better suited to my healthcare recruitment business."
