Microsoft Copilot vs ChatGPT for Business (2026): Which Fits a Small Team?

Key takeaways

Verdict: it depends on whether you already pay for Microsoft 365

For a small team, the real question isn’t which chatbot is “smarter”. We haven’t tested that, and we won’t claim it. The question is where your team already works.

• If you already pay for Microsoft 365 and live in Outlook, Word, Excel and Teams: start with Microsoft Copilot. Copilot Chat is included at no extra cost with an eligible Microsoft 365 plan and a work account, and the paid Copilot plans put the assistant inside those apps. The catch: the better features need a paid Copilot plan, and Microsoft’s plan prices assume a yearly subscription that auto-renews.
• If you don’t use Microsoft 365, or want one AI workspace separate from your office software: look at ChatGPT Business. Standard seats are $20 per user a month billed yearly, or $25 billed monthly, with a 2-seat minimum.
• If you’re a 2-person team, ChatGPT Business’s 2-seat minimum fits you exactly, so the cost is $40 a month on yearly billing before tax.
• If you’re already on a Google Workspace plan, Microsoft Copilot won’t help with your Google documents. Look at ChatGPT Business, or at Gemini, which our ChatGPT vs Claude vs Gemini comparison covers.

In every case, run a short trial on real work before you commit to a yearly plan.

Research-based comparison. We have not tested these products hands-on yet. Everything below comes from Microsoft’s and OpenAI’s published pages, checked 28 October 2026. Cost note: Copilot Chat has no extra cost on an eligible Microsoft 365 plan, but the plans with Copilot built in start at $23.50 per user a month paid yearly. ChatGPT Business starts at $20 per user a month paid yearly, with 2 seats minimum. Prices are US dollars, before tax.

At a glance: team plans per user per month (USD)

Tool	Cheapest way in	Team plan with the AI built in	Billing	Minimum
Microsoft Copilot	Copilot Chat at no extra cost with an eligible Microsoft 365 plan and a work account	Business Standard with Copilot: $23.50 paid yearly, $28.20 monthly. Business Premium with Copilot: $32 yearly, $38.40 monthly	Annual subscription, auto-renews (monthly option costs more)	Plans are for up to 300 users
ChatGPT Business	ChatGPT Free is for individuals; its price table does not list a Business trial (unconfirmed)	Standard seat: $20 per user a month billed yearly, $25 monthly. Premium seat: $100 yearly, $125 monthly	Monthly or yearly, by card	2 seats

From Microsoft's and OpenAI's own pages. We have not used either product on real work, so this table says nothing about answer quality. Prices are US list prices in dollars, before tax. Microsoft's plan prices are for an annual subscription that auto-renews; the monthly figure is Microsoft's own monthly option. Facts checked 28 Oct 2026 on each maker's own pages. Prices change, so check before you buy.

What changed in 2026

Microsoft now sells Microsoft 365 plans with Copilot built in. Its page shows Business Standard with Copilot at $23.50 and Business Premium with Copilot at $32, per user a month, paid yearly. Separately it sells a “Microsoft 365 Copilot Business” add-on for people who already have an eligible Business plan. Its list price is $21 per user a month paid yearly. Microsoft shows a promotional price of $18 for the first year only. The conditions on that promo, from Microsoft’s footnote: it runs between 1 July and 31 December 2026, needs an annual commitment, applies to the first year only, isn’t available on trial subscriptions or combined with other offers, and Microsoft can change or cancel it. It’s for existing Microsoft 365 customers with an eligible Business plan, so a new customer can’t just pick it up. We use the $21 list price in our maths.

OpenAI renamed ChatGPT Team to ChatGPT Business on 29 August 2025. Its help article now describes two seat types, Standard and Premium. Premium costs $100 per user a month billed annually ($125 billed monthly) and, per OpenAI, gives 5 times more usage than Standard with no 5-hour usage limit. A workspace can mix both types. Both include ChatGPT, ChatGPT Work and Codex (OpenAI’s coding tool). If you run out of included usage, OpenAI sells workspace credits on a pay-as-you-use basis.

Free first: Copilot Chat vs ChatGPT Free

Copilot Chat is “available at no additional cost for all Microsoft Entra account users with an eligible Microsoft 365 subscription”, per Microsoft. An Entra account is a work or school sign-in managed by your organisation, so a personal Microsoft account isn’t the same thing. Copilot Chat is web-grounded AI chat. It can use agents, but agents are “priced on a metered basis” and need an Azure subscription, so a free chat can still lead to usage charges if you build agents. Microsoft’s Business Basic page also says that plan includes “AI chat with web grounding, writing assistance, and access to agents”.

ChatGPT Free is for individuals, according to OpenAI. It isn’t a team plan. If your staff use free accounts for work, that’s your policy decision. OpenAI’s Business plan is the one with workspace controls. OpenAI’s pricing page shows Go and Plus plans too, but it did not display their prices to us, so we don’t quote them.

Inside Word, Excel, Outlook and Teams

This is Microsoft’s strongest card on paper. Its pages say Copilot works in Word, Excel, PowerPoint, Outlook and Teams, with Researcher and Analyst agents plus Agent Builder and Copilot Studio for building your own. Microsoft says it can recap Teams meetings, catch you up on email and summarise chat threads, with some of those marked “Premium” on its Copilot Chat page. Microsoft says “select advanced AI features” are billed by usage, and its plan pages list “Cowork, Autopilot, and advanced AI experiences”. Microsoft’s Autopilot feature is Microsoft’s own name and has nothing to do with AIFix. Check what counts as usage before you roll it out.

ChatGPT Business works in its own workspace. OpenAI’s article lists GPTs (custom assistants), Projects, Apps, Company Knowledge, ChatGPT Agent and Deep Research. ChatGPT also has extensions for Excel, Word, PowerPoint and Google Sheets. OpenAI’s pricing page shows them as limited on Free and Go, included on Plus and expanded on Pro. It doesn’t say what you get on Business, so that’s unconfirmed. We found no meeting-recap feature on the pages we read. For meeting notes in any setup, see Otter vs Fireflies vs Fathom.

Files, data and who can see what

Microsoft says Copilot Chat “inherits all your existing Microsoft 365 security and compliance requirements, so only people with the right permissions can access the content it generates”, and that data resides in your geographical region. That’s an advantage if your files are already in SharePoint and OneDrive.

OpenAI’s help article says “OpenAI won’t train on your workspace’s data” for Business. Its pricing page says data is encrypted in transit (TLS 1.2) and at rest (AES-256). Business is a self-serve plan. If you need invoice billing, purchase orders, a signed BAA (a healthcare data agreement) or Zero Data Retention, OpenAI says to use a contracted plan such as Enterprise instead.

Privacy and admin

• Microsoft: uses your existing Microsoft 365 admin centre and licences. Plans cover up to 300 users. A one-month trial needs a credit card and, per Microsoft, converts to a paid subscription automatically unless you cancel. Microsoft’s footnote on the add-on offer also mentions a 7-day cancellation window for a prorated refund; check whether it applies to your plan.
• OpenAI: workspace credits for extra use, and a card as the payment method for Business. We didn’t read the admin screens, so check what controls you get. We haven’t found a trial for Business in the article we read.
• Pricing by country: OpenAI says pricing may vary by country and currency. Microsoft’s prices we quote are the US page.

What we checked, and what we haven’t tested

We read the pricing and plan pages in both yearly and monthly views. We haven’t signed in to either product. When we test, we plan to stay on free tiers only:

1. Sign in to Copilot Chat with a work account and ask the same five office questions we give ChatGPT Free, and compare features, not “quality”.
2. Open a real Word and Excel file in each, to see what each can read and edit.
3. Look at the admin screens we can see without paying.
4. Check what Copilot Chat shows for agents, since they’re metered.

The Copilot one-month trial needs a card and converts automatically, so we haven’t started it.

Pros and cons

	Microsoft Copilot	ChatGPT Business
Pros	Copilot Chat at no extra cost with an eligible plan; works inside the Microsoft apps your team already uses; data stays in your Microsoft 365 setup	Standalone workspace that doesn’t depend on any office suite; clear two-seat price list; Premium seats for heavy users
Cons	Better features need a paid plan priced for an annual commitment; agents and some features are metered; the cheapest promo is only for existing customers	Doesn’t live inside Word or Outlook in the way Copilot does (Office extensions unconfirmed on Business); 2-seat minimum; card billing only on self-serve

Pricing, and a 5-person example

Prices are US list prices in dollars before tax, checked 28 October 2026.

Plan	Paid yearly	Paid monthly
Microsoft 365 Business Basic	$7.00 per user	Unconfirmed
Business Standard with Copilot	$23.50 per user	$28.20 per user
Business Premium with Copilot	$32.00 per user	$38.40 per user
Copilot Business add-on (list)	$21.00 per user	$25.20 per user
ChatGPT Business Standard seat	$20 per user	$25 per user
ChatGPT Business Premium seat	$100 per user	$125 per user

Our maths for a 5-person office, paid yearly, per month:

• Business Basic ($7 × 5): $35.
• Business Standard with Copilot ($23.50 × 5): $117.50.
• Business Basic plus 5 ChatGPT Standard seats ($35 + $20 × 5): $135.
• Standard with Copilot plus 5 ChatGPT Standard seats ($117.50 + $100): $217.50.

These exclude tax, Copilot’s usage-based extras and ChatGPT workspace credits. Basic and Standard are different plans: Basic gives web and mobile versions of the Office apps, and Standard adds the desktop versions. So the $135 and $117.50 options don’t give you the same software. Compare features, not only the totals.

The monthly option costs more per user for both products. For the same 5 people on Standard with Copilot, Microsoft’s monthly price would be $141 ($28.20 × 5), against $117.50 yearly.

Outside the US

Prices here are US list prices in dollars. Microsoft and OpenAI both show local currency, and sometimes different prices, in other countries, and tax is added at checkout. OpenAI says pricing may vary by country. Before you sign, open each pricing page from your own country. Data location matters too. Microsoft says Copilot Chat’s data resides in your geographical region. We haven’t checked which regions are covered.

Which should your team pick?

Your situation	Start with	Why
Already on Microsoft 365 and live in Outlook and Teams	Microsoft Copilot	The assistant sits in the apps you already use
Team on Google Workspace	ChatGPT Business, or see Gemini	Copilot doesn’t help with Google files
2-person team, no office suite	ChatGPT Business	$40 a month yearly for 2 seats; no need to buy an office suite
50 people, Teams meetings every day	Pilot Copilot in Teams with 5 to 10 people	Per-user pricing and metered agents add up quickly, so test before rolling out

If you want the AI to do more than answer questions, such as connecting your inbox, calendar and CRM, you can have AIFix set up AI automations for your team. That’s our own service. For do-it-yourself tools, see n8n vs Make vs Zapier. For OpenAI’s earlier team-tasks update, see ChatGPT Team’s tasks feature.

FAQ

Is Microsoft Copilot Chat really free?

It’s at no additional cost for Microsoft Entra account users with an eligible Microsoft 365 subscription, per Microsoft. You still pay for the Microsoft 365 plan, and agents are metered and need an Azure subscription.

Can ChatGPT Business work with Outlook?

ChatGPT lists extensions for Excel, Word, PowerPoint and Google Sheets on its pricing page, and Outlook isn’t named there. What you get on the Business plan isn’t shown, so confirm in a trial.

What’s the minimum number of ChatGPT Business seats?

Two. OpenAI says a workspace needs at least 2 Standard or Premium seats in total, and one of each also counts.

Does ChatGPT Business train on our data?

OpenAI’s help article says it won’t train on your workspace’s data. Microsoft’s pages describe enterprise data protection and in-region data for Copilot Chat. Read each company’s terms for your own situation.

Can we mix Microsoft Copilot and ChatGPT?

Yes, they’re separate subscriptions, and the 5-person example above shows the cost of both. Mixing means two bills and two sets of admin settings, so check whether your team really needs both.

Is monthly or yearly billing better?

Yearly is cheaper per user on both. Microsoft’s prices assume an annual subscription that auto-renews. Monthly costs about 20 to 25 percent more, and gives you the freedom to cancel. If you’re unsure whether the team will use it, start monthly or on a trial, then switch to yearly.