Key takeaways
- If your office runs on Google Workspace, start with Gemini. If it runs on Microsoft 365, start with Copilot.
- ChatGPT and Claude both sell business plans that work with any email and file setup.
- Use a business plan, not personal accounts. Each vendor makes its data promises for the business product.
- Pick one tool, run it with two or three people for a month, then decide.
The best AI assistant for a small team is usually the one that fits the office software you already pay for. Google Workspace offices should look at Gemini first. Microsoft 365 offices should look at Copilot first. If you use neither, ChatGPT and Claude both sell plans made for teams.
This guide compares the four tools on what matters to an owner or office manager. That means plans, admin controls, what each vendor says about your data, and how well each one fits your existing setup. Prices and plan names change often, so treat the figures here as a snapshot and check each link before you buy.
Start with the software your office already uses
Most small teams already live in either Google or Microsoft apps. An assistant built into those apps can work with your email, documents and meetings without extra setup. That is the main reason to start there.
- Google Workspace office: look at Gemini.
- Microsoft 365 office: look at Microsoft 365 Copilot.
- Mixed or neither: compare ChatGPT and Claude.
If you are unsure which camp you are in, look at where your staff email lives. Gmail means Google. Outlook means Microsoft.
Compare the four business options
The table below shows how each vendor packages AI for a small team. Details come from each vendor’s own pricing or help pages.
| Tool | Business plan | What the vendor says | Best fit |
|---|---|---|---|
| ChatGPT | ChatGPT Business, priced per user with a 2-user minimum on the pricing page | “Your data is never used for training our models.” Admins manage users, usage, billing and seats | Mixed offices |
| Claude | Team plan, minimum 2 seats and maximum 150 on Claude pricing | Commercial inputs and outputs are not used for training by default | Mixed offices |
| Gemini | Included in Google Workspace Business plans, see Workspace pricing | Workspace does not use customer data for training without your prior permission | Google offices |
| Microsoft 365 Copilot | Add-on or bundle for Microsoft 365 Business plans, see Microsoft’s page | Prompts and responses are not used to train the underlying models | Microsoft offices |
Compare plans and prices
Prices below come from each vendor’s pricing page at the time of writing. They change, so confirm them before you buy.
- Claude Team: Claude pricing lists a standard seat at $20 per seat per month billed annually, or $25 billed monthly, with a minimum of 2 seats. Premium seats cost more and include higher usage.
- Microsoft 365 Copilot: Microsoft’s business page lists Microsoft 365 Business Standard with Copilot at $23.50 per user per month paid yearly. It also lists an add-on for people who already have an eligible Microsoft 365 Business plan.
- Gemini: Google’s Workspace pricing page shows Gemini inside the Business Starter, Standard and Plus plans. Gemini in Docs, Sheets, Slides, Drive, Meet and Chat is listed for Standard and Plus and not for Starter.
- ChatGPT Business: priced per user per month. The pricing page did not show the amount in the text we could read, so check it there.
If you already pay for Google Workspace or Microsoft 365, ask whether the AI features are an upgrade of your current plan. That is often simpler than adding a separate tool and a separate bill.
What each vendor says about your business data
Read these promises closely, because they apply to the business products and not to free personal accounts.
ChatGPT and Claude
OpenAI says on its ChatGPT Business page that your data is never used for training its models. Anthropic’s Privacy Center says commercial products are not used for training by default. It adds that feedback you submit, such as a thumbs up or down, can be used. Owners can switch off the rating feature in the organization settings.
Gemini
Google’s privacy hub says Workspace does not use customer data for training models without the customer’s prior permission. It also says chats and uploaded files in the Gemini app are not reviewed by human reviewers. Admins can turn the Gemini app off.
Microsoft 365 Copilot
Microsoft’s privacy article says prompts, responses and data accessed through Microsoft Graph are not used to train foundation models. It also says Copilot only surfaces files a person already has at least view permission to open. This means messy sharing permissions in SharePoint can expose files to the wrong people, so clean those up first.
Compare admin controls
Admin controls decide whether you can manage the tool or only hope people use it well.
- ChatGPT Business: admins manage users, usage, billing and seats. Apps such as Slack and Gmail can connect to it.
- Claude Team: Anthropic’s Team plan page lists central billing and access management, role-based permissions, and spend caps at the organization and individual level.
- Gemini: admins can turn Gemini features on or off in Gmail, Drive, Docs, Meet and Chat for supported editions.
- Copilot: admins assign licenses in the Microsoft 365 admin center and decide which agents are allowed in the organization.
All four let an owner control who has access. The differences are in how much of your existing setup they plug into.
Run a one-month trial
Do not roll out four tools at once. Follow these steps instead.
- Pick one tool using the table above.
- Choose two or three people with different jobs, such as sales, admin and operations.
- Give each person two real tasks, such as drafting a customer email or summarizing a long document.
- Ask them to note the time saved and the mistakes they had to fix.
- After a month, keep the tool, switch, or drop it.
Write down your rules for the trial before it starts. Our guide to writing an AI use policy covers what to include. If you pick ChatGPT, the next step is setting up a ChatGPT business workspace.
Check before you buy
- Confirm the current price and seat minimum on the vendor’s pricing page.
- Confirm you are buying a business plan and not a personal one.
- Ask who will be the owner or admin and what happens when that person leaves.
- Check that your team uses work accounts and not personal logins.
Tools in this guide
ChatGPT
by OpenAI
A general AI assistant for writing, research and everyday office tasks.
Best for Teams that want one general assistant for many tasks
Free plan, paid plans from Business Standard seat: $20 per user per month, billed yearly
Claude
by Anthropic
An AI assistant for writing, analysis and working through long documents.
Best for Teams that work with long documents and written content
Free plan, paid plans from Pro: $17 per month, billed yearly
Gemini
by Google
Google's AI assistant, built into Gmail, Docs and Meet for Workspace teams.
Best for Teams already paying for Google Workspace
Paid plans from Business Starter: $7 per user per month with a 1-year commitment
Microsoft 365 Copilot
by Microsoft
Microsoft's AI assistant that works inside Word, Excel, Outlook and Teams.
Best for Teams already paying for Microsoft 365
Paid plans from Copilot Business add-on: $18.00 per user per month, paid yearly (promotional through December 31, 2026)
Frequently asked questions
Which AI assistant should a small business choose between ChatGPT, Claude, Gemini and Copilot?
Start with the tool that matches the software your team already uses. Google Workspace offices usually begin with Gemini and Microsoft 365 offices with Copilot. If you use neither, ChatGPT and Claude both offer team plans.
Do ChatGPT Business and Claude Team train on our data?
ChatGPT's business page says your data is never used for training its models. Anthropic says commercial inputs and outputs are not used for training by default, with exceptions for feedback you choose to send.
Is Microsoft 365 Copilot safe for confidential company files?
Microsoft says prompts, responses and data accessed through Microsoft Graph are not used to train its foundation models, and Copilot only shows files a person already has permission to open. Your own sharing settings still matter.
Sources
- ChatGPT pricing (OpenAI)
- ChatGPT Business (OpenAI)
- Claude pricing (Anthropic)
- What is the Team plan? (Claude Help Center)
- Is my data used for model training? (Anthropic Privacy Center)
- Google Workspace pricing
- Generative AI in Google Workspace privacy hub
- Microsoft 365 Copilot for business (Microsoft)
- Data, Privacy, and Security for Microsoft Copilot (Microsoft Learn)
About the author
Andy Kang, AI Partner Team. Andy Kang writes the AI directory for AI Partner Team, which sets up and builds AI tools for small businesses alongside managed IT. Each page is written from the vendor’s own pricing, help and trust pages, and shows the day those pages were checked.
- Facts come from the vendor’s own website and help docs, linked on every page.
- Each page shows the date we last read those sources.
- We do not score or rank tools. We say who each one suits and who it does not.
- If a vendor does not publish a price, we say so instead of guessing.