How we review: this assessment is based on the product’s official documentation, current pricing and published independent evaluations; it is not a hands-on test. Read our review methodology.
Microsoft 365 Copilot is Microsoft’s paid AI layer for work: an assistant inside Word, Excel, PowerPoint, Outlook and Teams that can draw on a company’s own email, files and meetings. In 2026 Microsoft added Copilot Cowork, an agent for long-running tasks that reached general availability on 16 June, alongside the existing Researcher and Analyst agents. This review looks at what Microsoft documents today, what it costs, and which organizations benefit most.
What it is
Copilot comes in two layers. Copilot Chat is available at no additional cost to users with an eligible Microsoft 365 work account and Microsoft Entra sign-in; it offers web-grounded chat, file uploads and Copilot Pages under enterprise privacy controls. The paid Microsoft 365 Copilot licence adds access to work data in Microsoft Graph, Copilot inside the Office apps, agents and admin analytics. Our Microsoft 365 Copilot directory entry gives a short summary.
Key features
- Copilot in the apps. Microsoft lists Copilot in Word, Excel, PowerPoint, Outlook, Teams and OneDrive for drafting, analysis, summaries and meeting recaps. Some features require a Microsoft Teams licence.
- Work-grounded chat and search. Chat and search draw on work data, including line-of-business systems connected through more than 100 connectors. Microsoft’s pricing page also mentions a choice of language model.
- Agents. The licence includes Researcher and Analyst, Facilitator for meetings, options from an Agent Store and custom agents built with Copilot Studio.
- Copilot Cowork. Microsoft describes Cowork as an agentic system for complex, multi-step tasks that runs in the cloud and returns a finished result. At general availability it ran on Anthropic models, with an OpenAI model available in Microsoft’s Frontier early-access programme. It is off by default, and admins set spending limits at tenant, group and user level.
- Copilot Notebooks and visual content. Notebooks gather project material in one place, and Copilot can generate images, posters, banners and videos aligned with a brand.
- Governance. Microsoft says Copilot inherits existing Microsoft 365 security, privacy and compliance policies, that tenant data is isolated and not used to train foundation models, and that Cowork supports audit logs, eDiscovery, retention and sensitivity labels. Copilot Analytics measures adoption and usage.
Pricing
At the time of writing (October 2026), Microsoft’s official pages list (US dollars, per user per month):
| Plan | Annual billing | Monthly billing | Notes |
|---|---|---|---|
| Copilot Chat | $0 | $0 | For users with an eligible Microsoft 365 subscription |
| Microsoft 365 Copilot Business (add-on) | $18 promotional (list $21) | $25.20 | Up to 300 users; requires an eligible Business plan |
| Microsoft 365 Business Standard with Copilot | $23.50 | $28.20 | Bundle including Office apps and email |
| Microsoft 365 Business Premium with Copilot | $32.00 | $38.40 | Adds advanced security and data protection |
| Microsoft 365 Copilot (enterprise add-on) | $30.00 | $31.50 (annual commitment) | Requires a qualifying Microsoft 365 plan |
The Business add-on’s $18 rate applies to annual subscriptions bought between 1 July and 31 December 2026, for the first year only. On top of licences, Microsoft bills some advanced features by usage in Copilot Credits, including Cowork; its Cowork announcement lists pay-as-you-go at $0.01 per credit, with the cost of each task depending on model use, retrieval, tool calls and runtime. A one-month trial is offered but requires a credit card.
Strengths
The main strength is context. Copilot can work with the documents, email threads and meetings an organization already keeps in Microsoft 365, inside the apps employees already use. For a company standardized on Microsoft, that removes a lot of friction that standalone assistants cannot avoid.
Governance is mature. Because Copilot inherits existing permissions, labels and retention policies, compliance teams do not need to build a separate control framework. Cowork’s per-task cost visibility and spending caps are a sensible design for agentic billing.
The bundled agents add real scope. Researcher, Analyst and Copilot Studio give teams a path from simple drafting to custom agents without a separate platform. Our framework for enterprise AI rollout explains how to plan that kind of staged adoption.
Limitations
Cost adds up. Copilot is an add-on to a Microsoft 365 plan, so the real price per user is the base licence plus Copilot, plus any Copilot Credits for usage-billed features. The cheapest Business price is promotional and time-limited.
Results depend on the data. Copilot can only be as useful as the files and permissions behind it. Organizations with messy SharePoint sites or overly broad sharing may surface the wrong documents, which is why Microsoft sells SharePoint Advanced Management alongside it.
Microsoft’s productivity claims, such as a commissioned Forrester study projecting more than 100% return on investment, are vendor-sponsored and should be checked against a company’s own pilot. Our guide to evaluating AI agents for workflow automation suggests how to measure that.
Who it’s for
- Organizations standardized on Microsoft 365 that want AI grounded in their own content.
- Regulated industries that need AI under existing compliance and retention controls.
- Teams heavy on meetings and email who want summaries and follow-ups in Teams and Outlook.
- IT departments planning custom agents with Copilot Studio.
Alternatives
- Claude — offers its own Microsoft 365 integration on paid plans.
- ChatGPT — a general assistant with business and enterprise tiers.
- Notion AI — AI built into a docs and wiki workspace.
Verdict
Microsoft 365 Copilot earns 4 out of 5. For companies already on Microsoft 365, its documented integration with the Office apps, work data and existing compliance controls is hard to match, and the included agents add real scope. We hold back a point because the true cost combines a base licence, the Copilot add-on and usage-based credits for the most advanced features, and because the value any organization gets depends heavily on the state of its own data.
