Microsoft Copilot vs. Google's New Gemini Agent: Which Office AI Should a Small Team Bet On?

Two announcements within a week make it look as if the office suite you use no longer decides your AI. From December 1, Microsoft will sell Copilot without a Microsoft 365 plan. And Google says its new Gemini agent will come at no extra charge for many Workspace customers and can even be reached from Microsoft 365. Read the fine print, though, and your suite matters as much as ever.

What Microsoft Changed

Copilot is Microsoft's AI assistant inside Word, Excel, PowerPoint, Outlook and Teams. Today, the small-business version, Copilot Business, is sold only as an add-on to a Microsoft 365 business plan. Microsoft told its resellers on October 14 that from December 1, new Copilot and Copilot Business offers "can be purchased without a qualifying Microsoft 365 base subscription," at the same price.

The key sentence comes next: "This purchasing change affects how customers purchase Copilot, not the underlying Copilot capabilities." Copilot still depends on the Microsoft 365 apps you are licensed for. Buying it alone will not make it work in Gmail.

What Google Announced

On October 8, Google introduced the Gemini agent, which Google Cloud's CEO called "your new single, universal agent for work." An agent is AI that carries out a multi-step job instead of just answering a question. You hand Gemini a goal, and it works inside Gmail, Drive, Docs, Sheets, Slides, Chat and Calendar, picking for each job a model from Google's Gemini family or Anthropic's Claude family. Google says you can even create "coworker agents" that get their own Workspace account, email address and calendar, and see only what you share with them.

The catch: it is in private preview, open only to select customers. 9to5Google reports wide availability is coming "soon" for select Workspace Business and Enterprise plans, with no date.

Side by Side

On price, VentureBeat reported Google's commitment that the agent will be "included at no additional charge for customers where Gemini Enterprise is available," including existing Workspace subscriptions. But Google had not said whether coworker agents, longer tasks or helper agents cost extra, and promised more pricing "closer to the wider release." Free until proven otherwise is not a budget line.

Which Should a Small Team Bet On?

If you run on Microsoft 365, Copilot is the one you can actually buy. Start with a few seats for the people who live in Outlook and Excel, and judge it after 60 days. If you commit, the first-year discount on annual plans requires starting by December 31.

If you run on Google Workspace, wait. Ask Google or your reseller whether your plan will qualify for the Gemini agent, and do not buy standalone Copilot hoping it will work in Gmail.

If you are thinking of switching suites for the AI, don't. Email, files and calendars are what your team lives in; the AI follows them. Both companies are adding agent features quickly, so judge them on your own tasks, not on launch-week promises.

What to Do Before December 1

1. Write down three weekly tasks you would hand an AI, such as meeting recaps, first-draft proposals or inbox triage. Test against those, not the demo.
2. If your next Microsoft bill says "Microsoft 365 Copilot Business (add-on)," that is the October 16 rename, not a new product. Microsoft says existing subscriptions need no action.

Not sure where AI fits yet? Our guide to AI tools by job is a good starting list, and our AI tool setup service handles the rollout.

Sources

1. Microsoft Partner Center, "October 2026 announcements," entry "Copilot offers and name updates" (October 14, 2026): standalone purchase, same price, "(add-on)" rename. learn.microsoft.com
2. Internet Archive, snapshot of Microsoft's "Copilot Plans and Pricing" for business (October 16, 2026): prices, discount terms, supported apps. web.archive.org
3. Google Cloud Blog, Thomas Kurian, "Gemini at Work 2026: Introducing Gemini agent" (October 8, 2026): features, models, coworker agents, spending limits. cloud.google.com
4. 9to5Google, "Google Cloud announces 'Gemini agent' as 'universal agent for work'" (October 8, 2026): private preview, plan availability. 9to5google.com
5. VentureBeat, "Google Cloud unveils persistent Gemini Agents for long-running tasks, and they get their own Gmail, Calendar, and Drive storage" (October 8, 2026): pricing commitment and open questions. venturebeat.com