If you’re weighing up Microsoft Copilot vs Gemini, here’s the short answer: choose the one that lives inside the software your team already uses every day. If your business runs on Microsoft 365 (Word, Excel, Outlook, Teams), Copilot is the natural fit. If you’re built around Google Workspace (Gmail, Docs, Sheets), Google Gemini will slot in more neatly. Both are capable AI assistants for business, the deciding factor is usually your existing setup, not a dramatic gap in quality.
That said, price, features and how you actually plan to use AI all matter. This guide breaks down what each tool does, the real UK costs, and how to pick the best AI productivity tool for a small business without overspending. An “AI assistant” here simply means software that can draft emails, summarise documents, analyse spreadsheets and answer questions using plain-language prompts.
What Microsoft Copilot actually does
Copilot is Microsoft’s AI woven through the 365 apps. In practice, it can draft a client email in Outlook, turn a messy Word document into a tidy summary, build formulas and charts in Excel, and produce a first-draft slide deck in PowerPoint. In Teams, it can summarise a meeting you missed and list the action points, genuinely useful if you’re a busy owner juggling calls.
The pull for many UK SMEs is that everything stays inside familiar tools. There’s no new app to learn; the assistant appears alongside the work you’re already doing. If you are just getting started, our guide on how UK small businesses can start using AI is a useful next read.
What Google Gemini brings to the table
Gemini is Google’s equivalent, built into Workspace. It helps you write and reply in Gmail, draft and refine in Docs, organise and analyse data in Sheets, and generate content in Slides. There’s also a standalone Gemini chat assistant for research, brainstorming and quick questions.
If your team already lives in Gmail and Google Docs, Gemini removes friction in the same way Copilot does for Microsoft users. Google tends to lean into fast, conversational research and strong handling of large documents.
Copilot 365 pricing and Gemini costs in the UK
Pricing changes often, so always check the official pages before you commit, but here’s the general shape of it for UK buyers.
- Copilot 365 pricing: Microsoft 365 Copilot is typically sold as an add-on for around £18, £19 per user per month (excluding VAT), on top of an existing Microsoft 365 Business subscription. That means it’s an additional cost layered onto your current licences, not a replacement.
- Google Gemini for Workspace: Google has folded AI features into its Workspace Business plans, so many users now get Gemini capabilities included rather than paying a separate per-seat add-on. Standalone Gemini plans are also available.
- Free tiers: Both Microsoft and Google offer free consumer versions (Copilot and the Gemini app). These are fine for casual experimentation but lack the security and data controls a business needs.
The key point for budgeting: with Copilot you’re usually adding a clear per-user line item, whereas Gemini increasingly comes bundled. Multiply any per-seat figure by your headcount and by 12 to see the true annual cost, for a five-person team, a £19 add-on is over £1,100 a year plus VAT.
Data, security and UK compliance
For business use, don’t rely on the free public versions. The paid, business-grade tiers of both Copilot and Gemini keep your prompts and data out of the models’ general training and offer proper admin controls, important if you handle customer records under UK GDPR. It is worth pairing this with the basics covered in Cyber Essentials for UK small businesses.
A practical caution: AI can make mistakes, sometimes stated very confidently. If you’re using it for anything that touches HMRC filings, VAT figures or Companies House submissions and Making Tax Digital, treat the output as a helpful draft, not a final answer. Always have a human check the numbers and wording before anything official goes out.
So which should a small business choose?
- Already on Microsoft 365? Copilot is the low-friction choice. Best for teams heavy on Excel, Outlook and Teams meetings.
- Already on Google Workspace? Gemini makes more sense and may already be part of your plan.
- Starting fresh? Compare the total cost of the underlying suite plus AI, not just the AI add-on in isolation.
For most SMEs, switching your entire productivity suite just to get a particular AI assistant isn’t worth the disruption. The winner is nearly always the one that matches where your work already happens.
What to do next
- Audit your current setup. Confirm whether you’re primarily on Microsoft 365 or Google Workspace, that alone narrows the decision.
- Trial before you roll out. Enable the assistant for one or two people on real tasks for a month before buying seats for everyone.
- Check the current UK pricing and VAT on the official Microsoft and Google pages, then calculate the annual cost for your headcount.
- Set a simple usage rule: AI drafts, humans approve, especially for anything financial, legal or customer-facing.
A side-by-side comparison for UK buyers
The table below pulls together the practical differences that tend to matter most when you are choosing between the two. Treat the pricing as indicative and confirm current figures before you buy.
| Factor | Microsoft Copilot | Google Gemini |
|---|---|---|
| Best fit | Teams already on Microsoft 365 | Teams already on Google Workspace |
| Typical business cost | Around £18 to £19 per user per month plus VAT, as an add-on | Increasingly bundled into Business plans, or a standalone add-on |
| Strongest apps | Excel, Outlook, Teams, PowerPoint | Gmail, Docs, Sheets, Slides |
| Meeting summaries | Strong in Teams | Available in Google Meet |
| Standalone chat | Copilot chat | Gemini app and web |
| Admin and data controls | Microsoft 365 admin centre | Google Workspace admin console |
| Learning curve | Low if you know Office | Low if you know Workspace |
A realistic 30-day trial plan
Rushing to buy seats for the whole team is the most common and expensive mistake. Run a structured trial first so you have evidence, not a hunch, before committing budget.
- Week 1: pick two people and real tasks. Choose one person who lives in email and documents, and one who works heavily in spreadsheets. Give them three genuine jobs each, for example drafting quotes, summarising a long PDF, and cleaning up a sales spreadsheet.
- Week 2: measure the time saved. Ask them to jot down roughly how long each task used to take versus with the assistant. You are looking for consistent 10 to 30 minute savings on repeat jobs, not one-off wins.
- Week 3: stress-test accuracy. Deliberately feed it a tricky VAT calculation or a nuanced client email and check how often it gets things wrong. This tells you how much human checking you will realistically need.
- Week 4: decide and cost it. Multiply the per-seat price by the number of people who would genuinely use it daily, not everyone on the payroll. Many SMEs find only half the team needs a licence.
The hidden costs people forget
The headline per-user price is rarely the full story. Budget for these too.
- Annual commitment. Both Microsoft and Google often price their best rates on annual plans. A £19 monthly figure billed annually still ties you in for a year, so a five-seat rollout is a genuine £1,100 plus VAT decision, not a casual tap-and-go.
- Underlying licence. Copilot only works if you already pay for a qualifying Microsoft 365 Business plan underneath it. If you are on a cheaper tier, factor in an upgrade first.
- Training time. The tools are easy, but writing good prompts is a skill. Allow a couple of hours per person in the first fortnight so they actually get value rather than giving up after a bad first attempt.
- Wasted seats. The biggest silent cost is licences nobody uses. Review usage after three months and drop seats that are sitting idle.
Common pitfalls to avoid
A few traps catch out small businesses again and again.
- Confidently wrong answers. Both assistants can invent figures, misquote a document or get a formula subtly wrong. Never paste AI output straight into an invoice, contract or tax return without checking.
- Using the free consumer version for work data. The free Copilot and Gemini apps do not give you the business data protections. If a team member is pasting client details into a personal account, that is a UK GDPR risk you want to shut down quickly.
- Buying for the whole team on day one. Usage is uneven. Start small, prove value, then expand.
- Expecting it to replace expertise. These tools speed up drafting and analysis. They do not replace an accountant, a solicitor or your own judgement on customer relationships.
- Ignoring your admin settings. Whoever runs your Microsoft or Google admin should set data and sharing controls before rollout, not after something goes wrong.
What each tool is genuinely best at
If your work is numbers-heavy, Copilot in Excel is hard to beat for building formulas, explaining what a spreadsheet does and spotting patterns, and its Teams meeting summaries save real time if you are in back-to-back calls. If your days are spent writing, replying and researching, Gemini tends to feel fast and fluent in Gmail and Docs, and it handles long documents well when you need a quick summary or a redraft.
For a solo owner or micro business that is not tied to either suite, it is worth remembering you do not always need a per-seat business plan at all. A single standalone AI subscription might cover your drafting and research needs for a fraction of the cost until your team grows.
Frequently asked questions
Can I use both Copilot and Gemini together?
You can, but for most small businesses it is not worth paying for both. Stick with the one built into your main productivity suite and, if needed, add a single standalone chat tool for research rather than duplicating seats across two systems.
Is the free version good enough for a small business?
For occasional personal experimenting, yes. For anything involving customer data, financial figures or client emails, no. The free versions lack the admin controls and data protections a business needs under UK GDPR, so use the paid business tiers for real work.
Will AI replace staff in my business?
Not in the way headlines suggest. For most SMEs these tools remove repetitive drafting, summarising and data tidying, freeing people up for higher-value work. Treat them as an assistant that speeds up tasks, not a replacement for judgement or expertise.
How much can a five-person team realistically expect to pay?
If you go with Copilot at roughly £19 per user per month, five seats is around £1,140 a year plus VAT, on top of your existing Microsoft 365 licences. With Gemini, the cost may already be bundled into your Workspace plan, so check before assuming you need to pay extra.
Do I need technical skills to set these up?
No. Both are enabled through your existing admin console and appear inside apps your team already uses. The main effort is not technical setup but training people to write clear prompts and building the habit of checking AI output before it goes out.
