Business AI Plans: ChatGPT, Claude, Gemini, Copilot Compared

The short answer: for a small or mid-sized company, the safest choice is the AI plan that matches the office suite you already use. If you run Microsoft 365, start with Copilot (the free Copilot Chat first, then paid Microsoft 365 Copilot seats for the people who need it). If you run Google Workspace, Gemini is already built into the subscription, so you can begin with no separate AI fee. If you use neither, or simply want an all-purpose AI chat for everyone, ChatGPT Business and Claude Team both cost roughly 20 USD per user per month on annual billing (about 3,000 yen at 150 yen to the dollar), with business data excluded from model training by default. All figures are estimates based on official announcements and secondary reports as of October 2026 and will move with exchange rates and price changes, so confirm on each vendor pricing page before signing. The biggest risk is not the price gap but employees quietly using free or personal AI accounts for work. For the wider rollout picture, see the SMB generative AI adoption guide.

We compare ChatGPT (OpenAI), Claude (Anthropic), Gemini (Google) and Copilot (Microsoft). Each has business plans separate from its personal subscriptions. What they share: business data is not used for model training by default, administrators can manage users centrally, and security features such as single sign-on (SSO, which lets staff sign in to the AI with their normal company login) are available.

Pricing is per user per month, and annual billing is cheaper than monthly. Reports put ChatGPT Business and Claude Team at about 20 USD on annual billing and 25 USD on monthly billing, with a minimum of around two seats (sources disagree, so verify). Gemini is bundled into Google Workspace pricing. Copilot splits into a paid license added on top of Microsoft 365 and a chat feature that costs nothing extra.

These figures combine official announcements and third-party reporting as of October 2026 and are estimates; exchange rates, taxes and promotions change them. Copilot Business in particular has an 18 USD promotional price whose end date differs by source. The minimum seat count and which features each Claude seat includes are also reported inconsistently, so check the official pages.

ChatGPT Business is the most familiar tool for most employees, which keeps training costs low. It offers an admin console, SAML SSO and connectors to tools such as Slack and Google Drive, and conversations are excluded from model training by default. It is easy to pilot with a small group. For writing usage rules, see company rules for ChatGPT.

Claude Team is regarded as strong at reading and summarizing long documents, writing and coding help, and lets you mix Standard and Premium seats. Premium offers far higher usage and suits developers and heavy users; putting everyone on Premium would multiply costs roughly fivefold, so reserve it for heavy users.

Gemini has the lowest barrier for Google Workspace customers: AI is built into Gmail, Docs, Sheets and Meet, and the old separate add-on is gone. Note that Workspace base prices rose when Gemini was bundled, so it is not accurate to call it cheap on an AI-only basis. Google Cloud also sells a separate product, Gemini Enterprise, for company-wide search and agents; its Business edition is reported at about 21 USD per seat with higher tiers above that. For ordinary office work, first check whether Gemini inside Workspace is enough.

Copilot is confusing because several products share the name. Copilot Chat is included at no extra cost with eligible Microsoft 365 plans; it is web-grounded chat and does not directly work inside Word, Excel or Outlook. The paid Microsoft 365 Copilot puts AI inside Word, Excel, PowerPoint, Outlook and Teams. Copilot Business, for organizations with 300 users or fewer, is priced lower. Before buying paid seats for everyone, use the free Copilot Chat to find where AI actually helps.

Look at three things in order rather than at the price list first: fit with your existing environment, main use cases, and management and security requirements.

Microsoft 365 companies can naturally start with Copilot Chat and grow into Teams and Outlook, because file permissions and sharing settings carry over to the AI. Google Workspace companies get the shortest path with Gemini. The differences between the suites are covered in Google Workspace vs Microsoft 365 for SMBs. You can add ChatGPT Business or Claude Team on top of either, but the AI will not be directly connected to your internal files by default.

Check five points: whether data is excluded from training, whether admins can add and remove users, whether SSO is supported, whether an audit log is available, and whether data retention can be configured. The first three are generally standard in business plans, while detailed audit logs and retention controls are often limited to Enterprise-level plans. Most small companies can start with the Business or Team tier and consider an upgrade only if, for example, a client demands audit logs.

The estimates below assume 150 yen to the dollar, rounded. Actual invoices vary with exchange rates, consumption tax and promotions.

Buying a seat for everyone gets expensive. A 30-person company giving everyone Copilot Business pays about 1.13 million yen a year, but if only 10 people will actually use it, the bill is about 380,000 yen. Start with the people most likely to use it and add seats as usage shows up. Training and rule-making cost extra; see the cost of generative AI employee training.

Employees typing work material into personal free accounts or personal paid plans is the first problem to fix, before the question of which business plan to buy. Depending on settings, personal services may use inputs to improve models, and the company cannot see or manage who uses them. The main risks:

- Customer data, quotes and contracts remain in accounts the company does not control
- Chat history and files stay in a personal account when someone leaves or changes roles
- The company cannot see who entered what, so incidents cannot be traced
- SSO and permission controls are unavailable, so account takeovers go unnoticed
- You cannot answer security questionnaires from clients

Switching to a business plan does not solve this by itself. You still need rules about what may and may not be entered. If the rules stay vague, personal accounts will keep being used alongside the contract.

- Confirm your current mail and file platform (Microsoft 365 or Google Workspace)
- Decide the pilot size (start with about 5-10 people) and target tasks
- Write down what may and may not be entered
- Confirm on the official page that data is excluded from training before signing
- Check SSO, admin permissions and whether you need audit logs
- Choose annual or monthly billing and confirm cancellation and seat-change terms
- Build a 10-20% margin into the budget for exchange rates and price changes
- Appoint someone to field internal questions
- Tell staff to stop using personal free accounts for work
- Schedule a review of usage after three months

First, buying seats for everyone when most go unused; a small monthly fee becomes hundreds of thousands of yen a year in fixed cost. Second, handing out tools with no rules, leading to confidential data being entered. Third, choosing on price alone and ending up with a tool that does not fit the existing office suite, so people do not adopt it. Fourth, budgeting from outdated articles and finding the real invoice differs. Fifth, confusing free Copilot Chat with paid Microsoft 365 Copilot and being disappointed that AI does not work inside Word.

The fixes are simple: pilot with a small group, write the rules first, verify current official prices, and review seat counts every three months.