If you're paying for Microsoft 365 and wondering whether Copilot is enough — or if Claude does it better — here's the honest answer.
If your team lives inside Word, Outlook, Teams, and Excel and you want AI woven directly into those tools, Copilot is genuinely useful. But it's expensive, requires an M365 Business licence to unlock the best features, and the output quality is inconsistent. Claude produces better writing, handles longer documents, and costs less — and you don't need to already be on a Microsoft stack to use it.
Microsoft Copilot is not a standalone product. To access the full AI features — Copilot in Word, Outlook, Teams, Excel, and PowerPoint — you need Microsoft 365 Business Standard (£10.30/user/month) plus the Copilot add-on (£25/user/month). That's £35.30 per user per month, or over £420 per user per year — and that's before considering that the full Copilot features require a minimum of 300 users in some enterprise scenarios.
There is a free tier of Copilot (formerly Bing Chat Enterprise), but this is significantly limited compared to the paid version and does not embed into Office apps. For the experience Microsoft advertises, you're looking at a meaningful investment.
Claude Pro, by comparison, is approximately £16/month per user with no additional licence requirement, no minimum seat count, and no dependency on your existing software stack. For small and medium-sized UK businesses not already on Microsoft 365 Business, this is a significant cost difference.
If your team already lives in Microsoft 365 and you're looking for AI that works inside Word, Outlook, and Teams rather than in a separate browser tab — Copilot's integration is its clearest advantage. Being able to highlight a block of text in Word and ask Copilot to rewrite it, or summarise an email thread directly in Outlook, removes the friction of switching between applications.
Copilot in Teams is particularly useful for meeting transcription, recap, and action item extraction from Teams meetings. If your business runs on Teams calls, this is a genuinely compelling use case that Claude (as a standalone browser tool) cannot replicate natively.
For large enterprises already committed to Microsoft's ecosystem, the compliance, data governance, and security posture of Copilot (running inside your existing M365 tenant) may also be a consideration that Claude's separate environment cannot match.
When we evaluated AI tools for business use, writing quality was our primary benchmark. We tested both tools on the same briefs — contract summaries, client emails, management reports, proposal drafts — and Claude produced significantly more polished, precise, and professional outputs on the first attempt. Copilot often required more re-prompting and produced outputs that needed heavier editing.
Claude also handles very long documents (up to 200,000 tokens — roughly 150,000 words) as a single input, whereas Copilot's handling of long documents varies across surfaces. For law firms reviewing contracts, or accountants processing long reports, this difference is material.
We also took a deliberate decision to train on a tool that doesn't require any particular software stack. Our clients range from solo traders to teams of 40 — and we needed a tool that works for all of them, regardless of whether they're on Google Workspace, Microsoft 365, or neither. Claude is that tool.
If you're already on M365 Business Standard and your team would genuinely use AI inside Word, Outlook, and Teams daily, the Copilot add-on (£25/user/month) can deliver value — particularly for Teams meeting recaps. However, if your main use case is drafting documents, emails, and reports, Claude delivers better quality outputs at a lower price without the M365 dependency.
Yes — Claude works in any browser tab alongside whatever apps you're using. You can paste content from Word, Outlook, or Excel into Claude, get an AI-drafted response or summary, then paste back. It's a different workflow from Copilot's embedded experience, but many teams prefer keeping their AI separate from their documents for data security reasons.
Both Claude (Anthropic) and Microsoft Copilot have enterprise-grade privacy policies, and both offer data processing agreements for business use. Microsoft's Copilot running within your M365 tenant may be preferable for organisations with strict data residency requirements. For most UK SMEs, both are appropriate for professional but non-classified content. Neither should be used for highly sensitive personal data without appropriate due diligence.
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