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Copilot is Microsoft's assistant built into Microsoft 365; on a paid plan it works inside Word, Excel, Outlook and Teams and reads your own email and files. ChatGPT is a standalone assistant that works on whatever you give it. A business seat costs about the same on both, $20 or $21 a month billed annually. Pick Copilot if your team lives in Microsoft 365. Otherwise, pick ChatGPT.
Every Copilot vs ChatGPT comparison lists the same features and ends with "it depends". What it depends on is mostly one thing: where your work already lives.
The prices are closer than most people expect. A ChatGPT Business seat and a Microsoft 365 Copilot seat sit within a dollar of each other on annual billing, so the real cost difference comes from what else you already pay for.
Below, both are compared side by side, every price is read from the vendors' own pages in November 2026, and the whole bill is worked out for one person and for a team of five.
Copilot vs ChatGPT at a Glance
| Microsoft Copilot | ChatGPT | |
|---|---|---|
| What it is | An assistant built into Microsoft 365 and Windows | A standalone assistant on web, desktop and mobile |
| Free version | Yes: the Copilot app, and Copilot Chat for business accounts | Yes: ChatGPT Free |
| Works inside Word, Excel, Outlook, Teams | Yes, on a paid plan | Through extensions for Excel, Word and PowerPoint, with limits by plan |
| Reads your own email, files and meetings | Yes, on a paid plan, through Microsoft Graph | On ChatGPT Business, through connectors you switch on |
| Cheapest paid plan | Microsoft 365 Personal, $9.99 a month, Office apps included | ChatGPT Go, $5 a month |
| Business seat | $21 a month add-on, or $23.50 with Office and email included | $20 a month, minimum 2 users |
| Your business data | Covered by Microsoft's enterprise data protection on business plans | Not used for training by default on Business; personal plans train on chats unless you opt out |
| Best for | Teams that live in Outlook, Teams and Excel | Anyone else, and anyone on Google Workspace |
Business prices are per user per month on annual billing. The row that decides most cases is the fourth. Copilot's main advantage is that it already sees the email, files and meetings in your Microsoft 365 account. ChatGPT can reach some of the same data, but only on a business plan and only through connectors.
Which Copilot? Four Products Share the Name
Half the confusion in this comparison comes from Microsoft using one name for several products. Before comparing, check which one you mean.
- Microsoft Copilot (the app). Free, with usage limits. A general assistant much like free ChatGPT.
- Microsoft 365 Copilot Chat. Free for business accounts on eligible Microsoft 365 plans. Microsoft says it works from public web data, not your organization's files, emails or chats, and Copilot in Word, Excel, PowerPoint and OneNote needs a paid license.
- Microsoft 365 Copilot. The paid version. It works inside Word, Excel, PowerPoint, Outlook and Teams and draws on your work data. This is the one most comparisons mean.
- GitHub Copilot. A separate product that helps write code, with a free plan and a $10 a month Pro plan. It is not an alternative to ChatGPT for general business work; our guide to coding AI tools covers it.
The second item is the trap. A business owner who tries the free Copilot Chat and finds it no better than ChatGPT has not tested what the paid plan is for, which is reading what is already in your account.
Copilot vs ChatGPT Cost
Here is every plan a small business would consider, read from OpenAI's pricing page, Microsoft's Copilot pricing page and Microsoft 365 plans for individuals on November 13, 2026.
| Plan | Price | What you get |
|---|---|---|
| ChatGPT Free | $0 | Unlimited text chats, limited uploads, images and research |
| ChatGPT Go | $5 a month | More messages, uploads and memory; may include ads |
| ChatGPT Plus | $20 a month | Advanced reasoning models, projects, scheduled tasks, custom GPTs |
| ChatGPT Business | $20 per user a month billed annually, $25 monthly | Shared workspace, connectors, admin controls, no training on your data by default. 2 to 200 users |
| Microsoft Copilot app | $0 | General chat with usage limits |
| Microsoft 365 Personal | $9.99 a month or $99.99 a year | Word, Excel, Outlook and more, with Copilot in the apps at higher limits than free |
| Copilot Business add-on | $21 per user a month billed annually, $25.20 monthly | Copilot in your apps and work data. Needs an eligible Microsoft 365 business plan |
| Microsoft 365 Business Standard with Copilot | $23.50 per user a month billed annually, $28.20 monthly | Office apps, business email, Teams and Copilot in one plan |
| Microsoft 365 Business Premium with Copilot | $32 per user a month billed annually, $38.40 monthly | All of Business Standard plus advanced security and device management |
Two details change the math. Microsoft is selling the Copilot Business add-on at $18 instead of $21 for the first year on annual plans bought between July 1 and December 31, 2026. And Microsoft's plans list usage-based billing for select advanced AI features, so heavy use of some features costs extra on top of the seat.
On the consumer side, Copilot in Microsoft 365 Personal and Family is available only to the subscription owner, and Copilot in Excel needs the file saved to OneDrive with AutoSave on.
Worked Example: What Each Costs for 1 Person and for 5
Seat prices on their own mislead, because the Microsoft plans include things ChatGPT does not, such as Office apps and business email. Here is the full yearly bill for a team of five, on annual billing.
| Team of 5, one year | Cost | Includes Office apps and email? |
|---|---|---|
| ChatGPT Business | $1,200 | No |
| Copilot add-on, if you already pay for Microsoft 365 | $1,260 ($1,080 at the 2026 offer price) | Already paid for separately |
| Microsoft 365 Business Standard with Copilot | $1,410 | Yes |
| Microsoft 365 Business Premium with Copilot | $1,920 | Yes, plus advanced security |
Prices from OpenAI and Microsoft pricing pages, read November 13, 2026. Five users times the monthly per-user price on annual billing, times 12. The add-on figure uses the $21 list price.
Read it by what you already pay for. If your team has no Microsoft 365, ChatGPT Business at $1,200 is the cheaper assistant. If you need Office apps and business email anyway, Business Standard with Copilot at $1,410 covers both for $210 more.
If you already pay for Microsoft 365 and add ChatGPT Business as well, you pay $1,200 for an assistant that cannot see your email or files until you connect them. The Copilot add-on at $1,260 can, from the first day.
For a business of one, ChatGPT Business is not an option, since it starts at 2 users. ChatGPT Plus costs $240 a year. Microsoft 365 Business Standard with Copilot for one user costs $282 a year and includes Office apps and email.
Microsoft points individuals to Microsoft 365 Personal, at $99.99 a year, which includes Copilot in Word, Excel and Outlook with higher usage limits than the free app.
Aziz's take: If you already pay for Microsoft 365, stop comparing the two chat windows and look at where your week goes. If most of it is in Outlook, Teams and Excel, Copilot's job is reading what is already there, the one thing ChatGPT has to be wired up to do. Spread across Gmail and browser tabs, that advantage disappears.
Which Is Better, Copilot or ChatGPT?
Neither, for everyone. Three questions settle it for most small businesses.
Do your email, files and meetings live in Microsoft 365?
YesCopilot is in the running. Go to question 2.NoPoints to ChatGPT. Copilot's main advantage is data you do not have in Microsoft.Do you need it to read your own email, meetings and files?
YesPoints to Copilot, on a paid plan. That is the job it is built for.NoEither works. Go to question 3.Do you want one assistant for writing, research, images and code?
YesPoints to ChatGPT. It is built as a general assistant first.NoPoints to Copilot if you already pay for Microsoft 365, since you are halfway there.
One more difference matters if you want to choose the model. Microsoft says Copilot uses an automatic router that picks a model for each request, and a model selector in the app, with Claude models from Anthropic available in licensed Microsoft 365 experiences. ChatGPT runs OpenAI's own models, and which ones you get depends on your plan.
If you have decided you need an assistant but not which tasks to give it, our guide to automating a small business with AI starts with a three-day audit of where your hours go.
Copilot vs ChatGPT Pros and Cons
| Pros | Cons | |
|---|---|---|
| Copilot | Works inside the apps you already use. Reads your email, files and meetings on a paid plan. Enterprise data protection on business plans. Bundles with Office and email. | The free version cannot see your work data. The add-on needs a Microsoft 365 business plan. Some advanced features are billed by usage. Little benefit if you work outside Microsoft. |
| ChatGPT | Works the same anywhere. Cheapest paid entry at $5 a month. Strong general assistant for writing, research, images and code. Connects to Google Workspace, Slack and Microsoft 365 on Business. | Does not see your work data until you connect it. Business plan needs 2 users. Personal plans use your chats for training unless you opt out. |
Whichever you choose, write down what staff may and may not paste into it before anyone starts. Our AI governance policy guide covers the rules a small business needs.
Where Gemini Fits
Google's Gemini follows the same pattern as Copilot, for the other office suite. On Google Workspace, Gemini is built into the apps: the Business Starter plan includes Gemini in Gmail, and Business Standard adds it to Docs, Meet and more. Google states that your company data is not used to train its models.
That turns the three-way comparison into a simple rule. If your business runs on Microsoft 365, look at Copilot. If it runs on Google Workspace, look at Gemini. If it runs on neither, or on both, ChatGPT is the assistant that works the same everywhere.
Aziz's take: For a business of one, I would not pay for either on day one. Use the free versions for two weeks on real work, note every task where one saved you time, and pay for the one that earned it. A dollar of seat price is noise. An assistant that cannot see where your work lives is the expensive mistake.
To see what a full set of AI tools adds up to across a year, our AI tool pricing benchmark prices 15 tools founders actually buy, and our guide to ChatGPT for business covers the tasks it handles best.