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ChatGPT Outlook Add-in Tool vs Copilot Sidebar Chrome Extension

2 tools side by side, on the data we have on file for each.

Each tool carries its own last-checked date below

ChatGPT Outlook Add-in Tool

Writing Assistants · Free

vs

Copilot Sidebar Chrome Extension

Writing Assistants · Free

ChatGPT Outlook Add-in Tool Copilot Sidebar Chrome Extension
Price Free Free
Free tier Yes Yes
Our score 3.9 / 5 3.9 / 5
Our line on it Run ChatGPT directly in Outlook. Compose emails with AI assistance. Brings Microsoft Copilot's sidebar assistant to Chrome for drafting, research and summaries.
Best for Individuals, small teams Chrome users wanting Edge's Copilot sidebar
Not for - Anyone running lots of other heavy extensions
Platforms Windows Chrome
Category Writing Writing
Best described as Writing Assistants Writing Assistants
Last checked 3 Oct 2026 3 Oct 2026
We have not written a verdict for this pairing

The table above is the data on each tool's own page, side by side. A written head-to-head goes further: it names a winner per use case and says who should stay where they are. Those are written by a reviewer, pair by pair, so this one may not have its verdict yet.

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