Microsoft AI Chatbot for Business: Copilot Chat vs Microsoft 365 Copilot

Most small businesses should start with free Microsoft Copilot Chat, which comes with Microsoft 365 business plans at no extra cost, and add paid Microsoft 365 Copilot Business ($21 per user a month on annual billing, $25.20 monthly) only for people who live in email, meetings and files. Both use your work sign-in.

The decision is smaller than Microsoft's naming makes it look. Free Copilot Chat answers questions and works on whatever you paste or open. The paid licence reads across your emails, meetings and documents together. If nobody on your team needs that cross-reading, you do not need to pay for it yet.

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The two options in one table

Names have moved around. Microsoft Learn now says the Microsoft 365 Copilot app is called Microsoft Copilot, calls the paid small-business add-on Microsoft Copilot Business, and labels the free tier "Copilot Chat (Basic)". The pricing pages still say "Microsoft 365 Copilot Business" in places, so expect both names. Below, "Copilot Chat" means the free one and "Copilot Business" means the paid add-on for organisations of up to 300 users.

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Figures are Microsoft list prices checked in November 2026 and the Copilot Business page can show promotional pricing, so confirm on the day you buy. The $18 offer applies to annual billing, for the first year only, for existing Microsoft 365 business customers, and not to trial subscriptions. Microsoft Learn describes Copilot Business as an annual-commitment add-on, while the pricing page also sells a month-to-month subscription at $25.20, so read the terms at checkout. The enterprise Copilot add-on, for organisations above 300 users, is $30 per user a month paid yearly on top of a qualifying base licence.

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What free Copilot Chat does well

Three kinds of task suit the free chat, and they cover most of what a small office uses an assistant for.

Drafting and rewriting. Paste a rough note and ask for a clear reply. A kitchen fitter's office manager might paste a customer's complaint about a delayed worktop and ask for a calm, three-paragraph reply that offers a new date and does not blame the supplier. Sample output: an apology, the revised date in the second line, a direct sentence about what will happen if the date slips again. You still check the date, because the chat does not know it.

Summarising and explaining. Paste a supplier's terms and ask for the five clauses that affect delivery penalties. The chat handles that reading well, but it works from the text you gave it, so a clause you left out is a clause it missed.

Web-grounded research. It searches the web and gives sources. For a childcare nursery, "What are the typical ratios and what do inspectors usually check on mealtimes?" gets a reasonable starting summary, which a manager then checks against the regulator's own page. Web queries go to the Bing search service, which has its own data handling, so keep client names out of them.

The free chat is no longer just a blank text box. In Outlook and Teams it can work with the email thread or chat you have open, and you can upload a file with your prompt. On plans that include what Microsoft calls standard access to Copilot in Word, Excel and PowerPoint, staff without the add-on also get some help inside the document they are editing; the label in each app shows which experience a person has. What the free tier cannot do is search your mailbox, calendar and shared documents for you. The paid licence does exactly that, without you opening each one.

What the paid licence adds, with examples

Paying makes sense when the work is about finding things across many places. Four examples show it.

• "What did we agree with this customer?" The paid assistant can look across the email thread, the Teams meeting and the quote document. A care agency's manager preparing for a family review meeting gets one summary of the last three months of messages and notes instead of opening each.
• Meeting follow-up. With the licence, Teams recaps and action lists are available. A music school director who runs a 45-minute staff meeting each week gets a list of actions per person.
• Pre-built agents. The paid licence includes Microsoft's ready-made agents such as Researcher and Analyst. A kitchen fitter's owner renewing a worktop supplier contract can ask Researcher to gather the past year's emails, delivery complaints and price changes with that supplier, plus public news about it, into one briefing.
• Drafting from your own files. Ask it to write a proposal using last year's best-won quote as the style guide, and it can find that quote in SharePoint, if the person has permission to see it.

The last point matters for a reason that is not about the chatbot. The paid assistant sees whatever the user can see. If your shared drive has years of badly permissioned folders, the assistant will happily surface a payroll file to a member of staff who was never meant to see it. That is an existing permissions problem, but the assistant makes it visible. Microsoft lists SharePoint Advanced Management, which helps find overshared sites and limit what Copilot can discover, among the paid licence's features. Use it, but do a basic permissions clean-up yourself before you buy seats for everyone.

A three-person cost sum

Take a kitchen fitting business with nine staff: six fitters who use a phone, and three in the office (an owner, a planner and an office manager) on Microsoft 365 Business Standard at $14 a user. The plan costs 9 x $14 = $126 a month if all nine are on it. If you only move the three office staff onto the paid licence, the options are:

• Add Copilot Business to the existing plan: 3 x $21 = $63 a month, or $756 a year on annual billing. With the $18 promotion for existing customers on annual billing, 3 x $18 = $54 a month, or $648 for the year.
• Monthly billing instead: 3 x $25.20 = $75.60 a month, $907.20 across twelve months.
• Do nothing paid: $0 extra. Everyone uses free Copilot Chat.

These figures are illustrative arithmetic on list prices. They exclude any reseller margin and anything you pay for extra agents. The break-even sum is short. At a loaded cost of $30 an hour, $21 buys 42 minutes of work a month, so ask whether one office worker would save comfortably more than that, say two hours a month once checking time is allowed for. If the paid assistant saved the planner an hour a week across quotes and supplier emails, the arithmetic would favour the seat by a wide margin. If the answer is "not sure", run a month on the free chat first and count what people actually use it for.

Check the bundle before you buy separately

If you are on Business Standard and adding Copilot, price the bundle. Microsoft sells Business Standard with Copilot at $23.50 per user a month on annual billing, and Business Premium with Copilot at $32. Business Standard alone is $14 and the Copilot add-on is $21, which is $35 together, so the bundle is cheaper than buying the two separately when it applies to your situation. Even against the $18 first-year offer, $14 plus $18 is $32, still above the bundle. Month-to-month billing of the bundles is higher: $28.20 for Standard with Copilot and $38.40 for Premium with Copilot. Versions without Teams cost less again ($20.30 and $28.80 per user a month on annual billing). These figures were read on Microsoft's business pricing pages on 4 November 2026, so confirm when you buy.

Data protection: what you can and cannot say to staff

Microsoft Learn describes "enterprise data protection" for Copilot Chat and Copilot used with a work account. In plain terms: prompts and responses are covered by the Data Protection Addendum and Product Terms, Microsoft acts as a data processor, the data is encrypted and isolated between organisations, and it is not used to train foundation models. Copilot respects your existing permissions, applies sensitivity labels and retention policies where you have set them, and supports audit of interactions. The specific controls vary by subscription plan.

Two limits are easy to miss. First, web search queries are sent to the Bing search service, which operates separately and has its own handling, with the user and tenant identifiers removed. Second, the EU Data Boundary does not apply to web queries, and Anthropic models offered inside Copilot are currently excluded from it. If you have customers in the EU and that matters for your contracts, read those pages before you decide.

A line you can give staff: "Use Copilot Chat signed in with your work account. Do not use a personal Copilot or any chatbot signed in with a personal email for customer details." That one sentence prevents the commonest slip, which is someone using the free consumer chatbot because it is the one that comes up first. For the privacy question across all four big assistants, are ChatGPT, Claude, Gemini and Copilot GDPR-compliant goes through it, and what to check in an AI tool's privacy policy and terms gives a reading checklist.

The consumer option that is not for you

Copilot Pro is retired: Microsoft no longer sells it, and support ended on 1 August 2026. The option Microsoft points individuals to is Microsoft 365 Premium at $19.99 a month ($199.99 a year), which bundles the Office apps, storage and Copilot for the subscription owner. It is a personal subscription, tied to a personal Microsoft account, and is the wrong tool for client work. If a staff member is already paying for a personal plan, do not reimburse it as a way of "getting Copilot". Put them on your work tenant.

How to pilot it in four weeks

A short trial removes most of the guessing.

1. Week 1: switch on free Copilot Chat for everyone and publish the one-line rule about work accounts. Collect three tasks per person that they tried.
2. Week 2: pick the heavy users. The admin centre has a Copilot usage report showing active users over several periods. Pair it with a quick question: who is searching across email and files most?
3. Week 3: trial the paid licence on two or three people. Copilot Business has a one-month trial that converts to paid automatically, so set a calendar reminder to cancel or confirm before the month ends. The $18 first-year offer does not apply to trial subscriptions, so if you plan to keep the seats, compare that price with the trial route before you start.
4. Week 4: compare. Ask each trial user to name one job the paid version did that the free chat could not. If they cannot, cancel. If they can, buy for that group only.

A realistic mistake from a pilot like this: a manager assigns paid seats to everyone "so nobody feels left out", then discovers 70 per cent of the seats are idle after two months. The usage report shows it, and licences can be reassigned. Keep a short list of who has a seat and why, and review it each quarter.

Same question, free and paid: what comes back

A side-by-side makes the gap concrete. Take a care agency's manager preparing for a review with a client's family, using these two prompts.

On free Copilot Chat, with the relevant notes pasted in: "Summarise these three care notes into five bullet points for a family meeting, and list any open actions." The reply is tidy and accurate to the text you pasted, with sample bullets such as "Mobility: two falls reported in the month, both without injury" and "Open action: confirm physiotherapy referral". It knows nothing beyond the paste, so if the fourth note was in a different folder, it is absent.

On the paid licence the prompt becomes: "Using this client's emails, the last three Teams meetings and the care plan in SharePoint, summarise the past month and list open actions." It can find the material itself, which is the whole of what you are paying for. The risk moves from "missing information" to "wrong information found": it may pull a note from a similarly named client. The check is to ask it to cite which items it used, then open the two or three that matter.

That check is the honest test of a trial. If your staff say "it saved me searching", the paid version is working. If they say "I spent the time I saved checking it", the job was not search-heavy enough to justify the seat.

Setting it up so staff use the right chatbot

Buying is the easy part. Four steps keep use safe and visible.

1. Pin Copilot Chat on every work browser and the Microsoft 365 apps, so staff reach the protected one first rather than a consumer chatbot.
2. Write one page of rules. Say what goes in (public information, drafts, anonymised notes) and what does not (full customer records unless your approval says so). Keep it under 200 words.
3. Tidy sharing before seats. Open the biggest shared folders and ask whether everyone with access should have it. Remove "Everyone" access on anything sensitive.
4. Review usage monthly. Use the admin centre report and reassign idle seats.

A realistic slip: a childcare nursery's administrator uses her personal Copilot account at home to summarise a parent complaint because the work laptop is in the office. Nothing malicious, but the personal account lacks the work data protection terms, and the complaint now sits in a personal history. The fix is not a ban on home working. It is a rule that work text only goes into the work-signed-in chat, and a reminder of how to tell which one you are in: Microsoft shows a "Work" label under the profile and a green data protection shield when you are signed in with the work account.

Copilot or another assistant?

If most of your work lives in Outlook, Teams, Word and Excel, Copilot's advantage is that it sits inside them. If your team mostly writes, researches and analyses in a browser, another assistant may suit better. ChatGPT or Copilot for a Microsoft 365 business compares the two for exactly that situation, and ChatGPT, Claude, Gemini and Copilot compared for small business widens the view. For agents and automation that Microsoft has added more recently, the Copilot agentic features guide explains what is available.

One more pointer for Excel users: the =COPILOT() worksheet function, a preview feature, was removed from 14 September 2026, while the Copilot side pane remains. If a spreadsheet of yours was built around that formula, rebuild the step with the side pane and check the values it writes.

Rules of thumb you can apply today

• Under about five people, all in Microsoft 365: use free Copilot Chat for a month, then buy one or two paid seats for the people who write the most customer-facing documents.
• Meetings are your main pain: price Teams Premium ($10 a user a month, paid yearly) against the Copilot seat, because intelligent recap comes with either.
• Mixed devices and little Microsoft use: free Copilot Chat is not the point. Pick the assistant that suits your main apps.
• Anything with customer personal data: use a work account only, and read the data protection page for your plan.

Prices and names in this area move monthly. Check Microsoft's own business pricing page before you sign anything, and distrust any page, this tutorial included, that does not give you the date it checked.

Copilot questions small businesses ask

Is Copilot Chat really free for a business?

Copilot Chat comes at no extra cost with Microsoft 365 business plans, so you pay only for the plan itself. It needs staff to sign in with their work account. Some extras, such as using agents, can carry usage charges, so check your admin centre before switching them on.

What happened to Copilot Pro?

Copilot Pro is retired. Microsoft no longer sells it and support ended on 1 August 2026. The consumer option Microsoft points to is Microsoft 365 Premium at $19.99 a month. A business should look at free Copilot Chat or the paid business licence instead, because enterprise data protection applies only when staff sign in with work accounts.

Does Microsoft train its models on my business prompts?

For Copilot Chat and Microsoft 365 Copilot used with a work account under enterprise data protection, Microsoft Learn says prompts and responses are not used to train foundation models. Web search queries are handled separately by the Bing service, so read the page on web queries as well.

Do all my staff need the paid licence?

No. The paid licence is bought per user, so give it to the people who work across email, meetings and files daily and let everyone else use free Copilot Chat. Review it after a month with the usage report in the Microsoft 365 admin centre and reassign unused seats.

Further reads

• AI Assistant for Hair Salons: ChatGPT, Claude, Gemini or Copilot? — The same four-assistant choice for a salon.
• ChatGPT and Copilot for HR: Which Suits a Small People Team? — A people-team view of the same choice.
• Best AI for Consulting Presentations: Gamma, Copilot, ChatGPT — How Copilot compares for slide decks.
• AI Tool Approval Process: How Staff Request a New AI Tool — Set up who approves a new AI tool before rolling it out.
• AI Governance for a Small Business: Who Decides, Approves, Checks — Decide who owns AI rules in a small team.
• AI Tools and AI Development: The Complete 2026 Guide — the AI hub, including every tutorial in the AI-for-business series.

Sources: Microsoft Copilot Business and enterprise pricing pages, Microsoft 365 business plans and Business Standard pages, Microsoft 365 Premium and Teams Premium pages, Microsoft Learn pages on Copilot overview, licence options and enterprise data protection, Microsoft Support page on Copilot Pro, and Microsoft's admin notice MC1454373 on the =COPILOT function, all read 4 November 2026; prices are USD list prices and can change.