Microsoft Copilot vs ChatGPT in a Microsoft 365 business
In a Microsoft 365 business, Copilot vs ChatGPT depends on which Copilot you have. Copilot Chat comes with eligible business licenses and answers from the web and the files you attach. Only the paid Microsoft 365 Copilot license lets it work from your organization’s email, files, and meetings. ChatGPT works alongside Microsoft 365 through Office extensions and, on its Business plan, connectors.
Copilot or ChatGPT: first, which Copilot?
Find out which Copilot your licenses include before comparing anything. Microsoft uses the name for several products, and what each one can see decides whether it beats ChatGPT for your work. This is the Microsoft side of which AI assistant to use, and Microsoft’s own page on the difference between the free Copilot and Copilot in Microsoft 365 is the place to start.
The names keep moving. As of November 2026, Microsoft calls its Microsoft 365 Copilot app simply Microsoft Copilot, and its Copilot Chat app Microsoft Copilot Chat, while its documentation still uses the older names in places.
The Copilots, untangled
| Product | For whom | What it adds |
|---|---|---|
| Microsoft Copilot (free) | Anyone; signing in is optional | Chat with answers grounded in web search; history, images, longer chats, and voice once you sign in |
| Copilot in Microsoft 365 Personal, Family, Premium, and Pro | Individuals and freelancers | Copilot in Word, Excel, PowerPoint, Outlook, and OneNote, for the subscription owner only |
| Microsoft Copilot Chat | Business accounts with an eligible Microsoft 365 license | Web-grounded chat, files you attach, content open in Outlook and Teams; included at no extra cost |
| Microsoft 365 Copilot, basic access | Business accounts without the add-on | Standard access to Copilot in Word, Excel, PowerPoint, and OneNote, within fair use limits |
| Microsoft 365 Copilot, premium | Paid license, such as the Copilot Business add-on | Answers drawn from your organization’s email, files, meetings, and calendars, plus the Researcher and Analyst agents |
Microsoft’s overview of Copilot for organizations shows each user’s level under their name in the app. For a small business, the key line is the last one: without the paid license, Copilot does not search your mailbox or your SharePoint files on its own; it works from what you give it.
The Copilot Business add-on is sold to organizations of up to 300 users on Microsoft 365 Business Basic, Standard, or Premium, among others, with an annual commitment, and Microsoft also sells bundles such as Business Standard with Copilot.
Where ChatGPT fits
ChatGPT does not live inside Outlook or Teams the way Copilot does, but it reaches Microsoft 365 in three ways:
- Extensions for Excel, Word, and PowerPoint, with limited versions on the free plan;
- Connectors on ChatGPT Business, including Microsoft 365, and deep research that can read SharePoint files without changing them;
- @ChatGPT in Teams, for Business, Enterprise, and Edu plans, installed by an administrator.
The choice is less about quality than about where the work happens. If most of it is email and meetings, Copilot with a paid license sees context that ChatGPT has to be given. If your clients send files in every format and your team uses several suites, a separate assistant can be more flexible.
Behind the scenes, the line is blurrier than the brands suggest. Microsoft lists GPT models from Microsoft and OpenAI, and Claude models from Anthropic, among those Copilot can use for organizations. In the UK, as in the EU, the Claude models are turned off by default and an administrator has to enable them.
For freelancers and personal subscriptions
Microsoft added Copilot to Microsoft 365 Personal and Family on January 16, 2025, with a $3 monthly price increase in the US. It stopped selling Copilot Pro on October 1, 2025, replacing it with Microsoft 365 Premium. As of November 2026, the Researcher and Analyst agents are not included in Personal and Family, and the Cowork agent for consumers is available only in the US and Canada.
In Australia, the ACCC sued Microsoft on October 27, 2025, alleging that it misled subscribers about the existence of cheaper plans without Copilot when it raised prices. These are allegations; we found no outcome as of November 10, 2026.
Controls and limits
An administrator can turn off web search in Copilot, image generation, agents, or Copilot Chat entirely, which helps a small business enforce its own AI rules. Microsoft also states plainly that Copilot can make mistakes, and that even when it works from your documents it may add information they do not contain. Check its summaries against the source before you forward them.
If you also use Google Workspace
Some small businesses run Gmail with Office files, or the reverse. Our comparison of ChatGPT and Gemini for Workspace users covers the Google side.
Before paying for a second assistant
Copilot Chat costs nothing extra if your licenses are eligible. Compare it with the free plans of the other assistants before adding a subscription.