Microsoft Copilot vs ChatGPT for Business: Which Should Your Team Use?

The quick verdict

Microsoft Copilot is the better pick for teams that live inside Microsoft 365. It works inside Word, Excel, Outlook and Teams, and it answers using your own company files. ChatGPT is the better pick for flexibility. It handles a wider range of tasks, connects to thousands of tools, and suits teams that want AI across the whole business rather than just inside Microsoft apps. Many small businesses do not need to choose forever. Start with the one that matches where your team already works.

What each tool actually is

Microsoft Copilot is Microsoft’s AI assistant for business. The main business version, Copilot for Microsoft 365, sits inside the apps your team already opens every day. You ask it questions in plain English and it drafts emails, summarises meetings, builds spreadsheets and finds information across your files.

ChatGPT is OpenAI’s AI chatbot, and its business plans are called ChatGPT Team and ChatGPT Enterprise. It is a standalone tool that you open in a browser or app. It writes, analyses, plans, codes and connects to other software through integrations and an API.

The key difference is where they live. Copilot comes to you inside Microsoft apps. ChatGPT expects you to go to it, then takes the results back to your work.

Where Copilot wins (Microsoft 365 teams)

If your team runs on Outlook, Word, Excel and Teams, Copilot feels almost invisible. That is its strength.

It can summarise a 60-minute Teams meeting into five bullet points. It drafts replies in Outlook using the tone of the thread. It builds Excel formulas from plain-English requests. It finds a paragraph buried in a SharePoint document without you opening it.

Crucially, Copilot respects your existing Microsoft permissions. It only surfaces files the person asking already has access to. For a small business, that means you get AI without rebuilding how you store and share documents.

Copilot also grounds its answers in your work data. Ask about next week’s client deadlines and it can pull from your calendar, emails and project files together, not just its general training.

Where ChatGPT wins (flexibility and workflows)

ChatGPT shines when the work goes beyond Microsoft apps. It is the stronger all-round assistant.

It connects to thousands of third-party tools, from Slack and Google Workspace to CRM systems and project boards. Custom GPTs let you build mini assistants for specific jobs, like a proposal writer trained on your past winning bids. The API lets developers wire it into your own products and internal tools.

For creative and analytical work, ChatGPT is hard to beat. It brainstorms marketing ideas, analyses uploaded spreadsheets, drafts long reports and explains complex topics in plain English. Teams that mix tools, rather than living in one suite, usually get more from ChatGPT.

ChatGPT also pairs well with automated workflows you can build without coding, so routine jobs like drafting newsletters or triaging emails can run on autopilot.

Pricing compared in plain terms

Pricing changes often, so treat these as current guides, not guarantees. Both tools charge per user per month.

Copilot for Microsoft 365 is the premium option. It typically costs around 24 to 28 pounds per user per month on top of your existing Microsoft 365 subscription. You need a business Microsoft 365 plan first, which adds its own cost if you do not have one.

ChatGPT Team usually costs around 20 to 25 pounds per user per month, with a minimum number of seats. It needs no other subscription. For a five-person team that does not use Microsoft 365, ChatGPT is clearly cheaper.

The maths flips for teams already paying for Microsoft 365 Business. Then Copilot is one add-on, and the gap narrows. Do the full calculation with your actual headcount before deciding, because the per-seat model punishes businesses that give logins to everyone.

Security and data: what UK businesses should check

Both tools offer business plans with stronger protections than their free versions. Neither free version is suitable for client or sensitive business data. That is the first rule.

On the paid plans, both promise that your data is not used to train their models. Both offer admin controls, audit logs and single sign-on. Copilot adds Microsoft’s enterprise compliance stack, including UK and EU data residency options, which matters if you handle regulated client data.

For UK businesses, three checks matter most. First, confirm data residency: where are your prompts stored? Second, check who in your team can see what: does the tool respect existing file permissions, or can clever prompting surface documents it should not? Third, write a simple AI policy. Tell staff what they may and may not paste into any AI tool. Customer personal data goes in only when you have a clear lawful basis, and never into a free plan.

If you want the bigger picture on protecting a small business, our small business cybersecurity checklist for the UK covers the foundations first.

Our recommendation by business type

Choose Copilot if: your team lives in Microsoft 365, you want AI inside the apps people already use, and you need strong data governance without extra setup. It is the low-friction option for established Microsoft shops.

Choose ChatGPT if: your team mixes tools, you want the most capable general assistant, you plan to build custom workflows or integrations, or you do not use Microsoft 365 at all. It is the flexible option for varied, modern stacks.

Consider both if: you are a growing team with mixed needs. Some businesses give Copilot to operations staff and ChatGPT to marketing and creative teams. The tools overlap less than the marketing suggests.

Whichever you pick, run a one-month trial with five to ten real users before rolling it out company-wide. Measure time saved on three specific tasks, then decide. For a broader sense of how AI assistants compare, see our ChatGPT vs Claude vs Gemini guide for small business.

FAQs

Can I use the free versions of Copilot or ChatGPT for my business?

You can, but you should not. Free plans offer weaker data protections, and your inputs may be used for training. For any real business use, pay for a business plan.

Do I need Microsoft 365 to use Copilot?

For the full Copilot for Microsoft 365 experience, yes. There are lighter Copilot versions, but the deep integration with Word, Excel and Teams needs a Microsoft 365 business subscription.

Which is better for a team of under 10 people?

It depends on your stack. Microsoft 365 teams usually get more value from Copilot. Teams on Google Workspace or mixed tools usually get more from ChatGPT Team.

Can staff use both tools at once?

Yes, and some businesses do. Just keep one clear AI policy covering both, so everyone knows what data is safe to share.

Will AI replace admin staff if we adopt one of these?

No. These tools remove repetitive drafting, summarising and searching, which frees staff for judgement work. The businesses that benefit most treat AI as an assistant, not a replacement. Our guide to AI workflow automation shows where the real time savings come from.

Conclusion

Microsoft Copilot vs ChatGPT for business is not really a fight with one winner. Copilot wins inside Microsoft 365. ChatGPT wins everywhere else. The right choice is the one that matches where your team already works and what data you need to protect. Pick one, trial it properly, measure the time it saves, and build your AI policy before you scale. Do that, and either tool will pay for itself.