Microsoft 365 Copilot Review
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Microsoft's AI assistant built into Word, Excel, PowerPoint, Outlook and Teams, grounded in your organisation's own emails, files and meetings. Sold as an add-on to Microsoft 365 business plans or bundled into them.
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- Best for
- UK organisations already on Microsoft 365 that want AI inside their existing documents, email and meetings
- Pricing
- £13.80/user/mo Copilot Business add-on / £18.10/user/mo Business Standard with Copilot / £24.60/user/mo Business Premium with Copilot GBP from Microsoft's UK pricing page, excl. VAT, per user per month on annual billing. The add-on price is a promotion (normally £16.10). Some advanced AI features are billed by usage on top. Enterprise plans (300+ users) are priced separately.
- Data residency
- UK at rest for UK tenants; UK processing expected by end of 2026
- UK English
- Yes
Our in-depth review
AI inside the office suite you already pay for
Microsoft 365 Copilot is not a separate app so much as a layer across Word, Excel, PowerPoint, Outlook and Teams. It drafts and rewrites documents, summarises long email threads, builds slides from a brief, analyses spreadsheets and recaps Teams meetings you missed. Its distinguishing feature is grounding: because it sits inside your Microsoft 365 tenant, its chat can draw on your organisation's own emails, files and meetings rather than only the public web. For a UK business already running on Microsoft 365, that removes most of the friction of adopting AI: there is no new tool to roll out, and staff meet it in apps they use every day.
Strengths
The integration is the case for buying it. Asking for a summary of everything said about a client across email, Teams and shared documents is the kind of task a standalone chatbot cannot do without manual copying. Microsoft now also includes pre-built agents for research and data analysis, and its Cowork and Autopilot features for longer, multi-step tasks, so the product has moved beyond writing help. Admins get adoption analytics and the compliance controls they already use for Microsoft 365. Pricing is quoted directly in pounds on Microsoft's UK site, which is rarer than it should be.
Limitations
Copilot only makes sense if you are already a Microsoft 365 business customer: it is an add-on or a bundled plan, not something you buy on its own. The headline prices assume annual billing, and some advanced AI features are billed by usage on top, so budget for more than the per-seat figure. Results also depend heavily on your data. If files are scattered, badly named or over-shared, Copilot will surface the mess, and over-permissive sharing becomes more visible once an assistant can search it. For heavy writing or reasoning outside the Microsoft ecosystem, a standalone assistant such as ChatGPT or Claude remains more flexible.
UK data and GDPR
This is Copilot's strongest card for UK buyers. Microsoft's documentation says tenants with a UK sign-up country are covered by its Product Terms data residency commitments for Microsoft 365 Copilot, meaning Copilot data is stored at rest in the UK. Microsoft has also promised in-country processing of Copilot interactions for the UK; that was originally due by the end of 2025 and is now expected by the end of 2026, so check its status before relying on it. One important carve-out: Anthropic models available inside Copilot are excluded from the EU Data Boundary and in-country commitments, and are switched off by default for UK tenants. Leave them off unless you have assessed that transfer.
Key features
- Copilot inside Word, Excel, PowerPoint, Outlook and Teams
- Chat grounded in your organisation's work data
- Pre-built research and data-analysis agents
- Cowork and Autopilot for multi-step tasks
- Adoption analytics and admin controls
Pros & cons
What we like
- Works inside the apps most UK offices already use
- Answers draw on your own emails, documents and meetings
- UK data residency commitments for Copilot data at rest
- Priced directly in GBP for UK customers
What to watch
- Requires a Microsoft 365 business subscription
- Listed prices assume an annual commitment
- Usage-based billing for some advanced features makes costs less predictable
- Only as useful as your SharePoint and OneDrive are organised
GDPR & data residency
Where your data is processed: UK at rest for UK tenants; UK processing expected by end of 2026
UK tenants are covered by Microsoft's Product Terms data residency commitments, so Copilot data is stored at rest in the UK. Enterprise Data Protection applies to work data, and Microsoft's standard DPA covers Microsoft 365. In-country processing of Copilot interactions for the UK is expected by the end of 2026. Anthropic models inside Copilot are excluded from these commitments and are off by default for UK tenants.
Our verdict
We rate Microsoft 365 Copilot 4.0 out of 5. It's best suited to uk organisations already on microsoft 365 that want ai inside their existing documents, email and meetings.
Visit Microsoft 365 Copilot →Frequently asked questions
How much does Microsoft 365 Copilot cost in the UK?
On Microsoft's UK site, the Copilot Business add-on is £13.80 per user per month on annual billing (a promotional price, normally £16.10), excluding VAT. Bundled plans cost £18.10 (Business Standard with Copilot) or £24.60 (Business Premium with Copilot) per user per month. Some advanced features are billed by usage on top.
Is Microsoft 365 Copilot data stored in the UK?
For UK tenants, yes: Copilot data at rest is covered by Microsoft's UK data residency commitments. Processing of Copilot interactions inside the UK is expected by the end of 2026. Anthropic models within Copilot are excluded from these commitments and are off by default for UK tenants.
Microsoft 365 Copilot or ChatGPT?
If your organisation lives in Microsoft 365, Copilot's access to your own email, files and meetings, plus its UK data residency, usually make it the better fit. ChatGPT is more flexible as a general-purpose assistant and doesn't require a Microsoft subscription.