Microsoft Copilot and Cowork Explained: Copilot Cowork, Claude Cowork – and the Perfect Complement to CompanyGPT

2026 is the year AI assistants turn into AI agents – and hardly any two terms come up as often as Microsoft Copilot and Cowork. The curious part: “Cowork” exists twice. Claude Cowork is Anthropic’s agentic app for knowledge work. Copilot Cowork is Microsoft’s answer – developed, according to Microsoft, in close collaboration with Anthropic and technically built on Claude Cowork.

In this article we sort out the field: how do Microsoft Copilot and the two Coworks work, what do they cost, where are the GDPR pitfalls – and why is Cowork an exciting complement rather than a competitor for companies already operating a sovereign platform like CompanyGPT?

Microsoft 365 Copilot: The Assistant in Everyday Office Work

Microsoft 365 Copilot is the established AI assistant in Word, Excel, PowerPoint, Outlook and Teams. It answers questions, drafts text, summarizes meetings and taps enterprise data via the Microsoft Graph. Since 2026, Microsoft bundles that context under the name Work IQ: mails, appointments, files and chats feed into the answers as working memory.

The feature set has become notably more agentic: pre-built agents like Researcher and Analyst create source-cited reports across web and work data (25 combined queries per month are included in the Copilot license), the agentic capabilities (Agent Mode) in Word, Excel and PowerPoint have been generally available since April 22, 2026, and Researcher lets you pick an Anthropic model alongside OpenAI.

Pricing changed considerably on July 1, 2026 (as of July 2026; the Microsoft pricing page is authoritative):

• Copilot Chat is included at no extra cost in eligible Microsoft 365 Business and Enterprise plans.
• The Microsoft 365 Copilot Business add-on for small and medium businesses is listed on the German pricing page at €21.84 per user per month with monthly billing; with annual billing, a promotional price of €15.60 applies through September 2026 (regular €18.20). The enterprise add-on Microsoft 365 Copilot sits at €28.10 per user per month. All prices excl. VAT, as of July 2026.
• New bundles such as “Microsoft 365 Business Standard with Copilot” make Copilot a fixed part of the M365 plans.
• Copilot Studio and agentic features are billed additionally via usage-based Copilot Credits.

Important for the big picture: Copilot remains primarily an assistant that responds to prompts. That is exactly where Cowork comes in.

Cowork: From Assistant to Agent

Claude Cowork (Anthropic)

Anthropic launched Claude Cowork in January 2026 as a research preview for macOS; Windows followed on February 10, 2026. On July 7, 2026, Anthropic additionally announced web and mobile versions as a beta – rolling out starting with Max subscribers – including cloud background processing: tasks keep running on Anthropic servers even when the laptop is closed, with status updates on your phone.

The working principle differs fundamentally from chat: you describe an outcome, not the individual steps. Cowork gets access to selected folders and connected tools – nothing more –, plans the task, splits it into parallel sub-tasks where useful, and delivers real files in the end: Excel spreadsheets with formulas, formatted Word documents, PowerPoint presentations. Deletions require approval. On top come recurring scheduled tasks, skills and plugins for specialist work, and MCP connectors for external systems.

What companies actually use this for, Anthropic has studied itself: in an analysis of 1.2 million anonymized Cowork sessions, 33.4 percent were business-process tasks such as reports, checklists and spreadsheet reconciliation, and only 8.7 percent software development – Anthropic calls it “the work around work”.

According to Anthropic’s product page, Cowork is included in all paid plans (Pro from $17/month with annual billing, Team from $20 per seat, Enterprise custom); on Team and Enterprise plans it is enabled by default and can be centrally disabled by org admins.

Copilot Cowork (Microsoft)

Microsoft quickly recognized that Anthropic’s approach works – and announced Copilot Cowork on March 9, 2026, with a remarkable sentence from the official blog: “Working closely with Anthropic, we have integrated the technology behind Claude Cowork into Microsoft 365 Copilot.” After the preview in the Frontier program (from March 30), Copilot Cowork has been generally available since June 16, 2026 – according to Microsoft, more than half of the Fortune 500 used it during the preview.

How Copilot Cowork Works in Detail

Copilot Cowork moves the agent principle into the M365 world – entirely in the cloud. You enter via the Cowork toggle next to “Chat” at m365.cloud.microsoft, in the Microsoft 365 Copilot desktop app (Windows and Mac) or on mobile (iOS and Android).

The task lifecycle: You describe the task – prompts may now be up to 250,000 characters long – and attach files or link mails, people, Teams chats and meetings via “Add work context”. Cowork breaks the task into steps, streams its progress visibly (“Composing your email”, “Searching OneDrive”) and can be interrupted at any time: interjections are queued, a soft pause lets the current step finish, a hard pause stops immediately. When something is unclear, Cowork asks back; the task then switches to “Needs input”.

Approvals with risk indicators: Before Cowork sends an email, posts to Teams, creates meetings or changes files, an approval dialog appears – with a content preview, a risk indicator for medium and high risks, and a button naming the concrete action (“Send”, “Post”, “Create”). Microsoft puts it this way: Cowork doesn’t execute sensitive actions without your explicit consent.

The results are real files: Word, Excel, PowerPoint and PDF, plus HTML newsletters and images. PowerPoint decks can be generated with the organization’s brand templates (fonts, colors, logos). Everything lands in the OneDrive folder “Cowork” – Cowork stores nothing locally on the machine. On top come scheduled prompts (up to five per user), such as a daily briefing at 9 a.m.

Know the limits: Cowork has no access to local files, cannot delete files in OneDrive and SharePoint, cannot read encrypted files, and accepts attachments only up to 200 MB. GA initially covers tier-1 languages only, and web tasks in the local Edge browser (“Local Browser Use”, with the user’s existing logins) are still a Frontier preview feature with its own admin switch.

Which Models Work Inside Copilot Cowork?

According to Microsoft’s documentation, Cowork uses Anthropic Claude models as a subprocessor for most reasoning, drafting and tool-using work. Depending on tenant settings, the model picker offers “Auto” (default), Claude Sonnet 5 for everyday tasks, Claude Opus 4.8 for complex analysis, GPT 5.5 (Frontier), and the paired mode “Sonnet + Opus Advisor”, where Sonnet does the work and Opus reviews the results; images are generated by Imagen 2. Preview models that require data retention at the model provider are always off by default and need a separate admin opt-in. Also announced: “Cowork 1”, a fine-tuned model that, according to Microsoft, will handle everyday tasks at a substantially lower cost.

Extensibility: Plugins, Custom Skills and MCP

At GA, Cowork launched with nine partner plugins – including Harvey (legal), monday.com, Moody’s, Morningstar, S&P Global and Miro – plus Microsoft’s own plugins for Fabric and Dynamics 365, and connectors to Jira, Salesforce, ServiceNow, SAP, Workday and Zendesk. Announced next are Adobe, Atlassian, Box and Canva, among others.

Technically most interesting: custom skills are stored as SKILL.md files in OneDrive (up to 50 per user) and follow the Agent Skills open standard – the same format supported by Claude Code, VS Code Copilot and dozens of other AI tools. Under the hood, connectors are remote MCP servers; Microsoft even ships an official conversion script for Claude Code plugins. Anyone who has already built MCP integrations takes their know-how straight across.

Enablement and Governance: What Admins Need to Know

Copilot Cowork is off by default – but there is no single on-switch. Access is created via usage-based billing: in the Microsoft 365 admin center under Copilot → Cost Management, the admin picks the payment path (Azure subscription or prepaid Copilot Credits) and sets spending limits per tenant, group or user. In addition, the get-started documentation explicitly lists as a prerequisite: “Anthropic enabled in tenant” – more on that in the privacy section.

On the governance side, the Purview integration delivers a lot, but not everything: the unified audit log captures conversations including prompts and responses, skill changes, browser tasks and file creation; sensitivity labels are inherited onto generated content including protection settings (with multiple sources, the highest-priority label wins); eDiscovery covers transcripts, generated files and scheduled prompts, and the insider-risk template “Risky AI usage” detects prompt-injection attempts. The surprise in the official support matrix: data loss prevention is not yet supported for Cowork (“coming soon”). Anyone counting on DLP policies as the last line of defense should phase the rollout accordingly.

What Does Copilot Cowork Cost?

The bill has two components: the Microsoft 365 Copilot license per user plus Copilot Credits by consumption – pay-as-you-go at $0.01 per credit or as a prepaid commitment with a discount. According to Microsoft, a task’s price depends on model use, context retrieval, tool calls and runtime; tasks are categorized as “light”, “medium” and “heavy”. Third-party sources referencing these classes cite roughly $1–3 for light and $7+ for heavy tasks – these rates are not officially confirmed; Microsoft instead provides an official cost estimator (aka.ms/CustomerCoworkEstimator).

Microsoft’s statement that Copilot Cowork is “30 to 40 percent cheaper” than Claude Cowork comes from the vendor’s own test series (125 test runs with Opus 4.8 against Claude Cowork with the M365 connector) – treat it as a vendor benchmark, not an independent comparison. The most important criticism since GA is a different one anyway: cost transparency. Users only see afterwards what a task cost. Our recommendation: configure spending limits and alerts before the rollout, collect consumption data with a pilot group, and only then scale.

Copilot, Copilot Cowork, Claude Cowork: The Direct Comparison

The GDPR Reality: What Enterprises Need to Watch

As impressive as the agents are – for European companies, their adoption is decided by the data question.

For Microsoft Copilot, two points need checking. First, flex routing: at peak load, Copilot requests can be processed in data centres outside the EU; for tenants created after March 25, 2026 the feature is on by default and must be consciously disabled – we broke down the details in our article on Copilot’s data processing outside the EU. Second, the Anthropic models in Copilot: according to Microsoft’s documentation they are “currently excluded from the EU Data Boundary” and are therefore disabled by default for tenants in the EU, EFTA and UK; anyone enabling them via admin opt-in should do so deliberately and with documentation.

For Copilot Cowork, this second point becomes even sharper – and it is stated in no single Microsoft document, but only emerges from chaining two documentation pages: the get-started page lists “Anthropic enabled in tenant” as a prerequisite, and the Claude models do most of the work in Cowork. For EU, EFTA and UK tenants, the consequence is: without an explicit admin opt-in for the Anthropic subprocessor, Copilot Cowork is effectively unusable – and with the opt-in, model processing leaves the EU Data Boundary. Anyone introducing Cowork in the EU should therefore document the opt-in, update the record of processing activities and, where applicable, the data protection impact assessment, review the subprocessor list in the DPA – and be aware of the DLP gap in Purview described above.

For Claude Cowork, the crux is inference routing: on consumer plans, no EU region can be chosen for processing – and the new cloud sessions run on Anthropic servers. On Team and Enterprise plans, Anthropic states it does not train on customer data; on consumer plans, training is on by default and must be switched off via opt-out. Also relevant for compliance is Anthropic’s own note that Cowork activity is currently not captured in the Compliance API (“not captured in the Compliance API at this time”). And as with any agent with browser access: prompt injection via crafted web content is a real risk, countered with domain allowlists and conservative approvals.

The clean path for Claude Cowork is Cowork 3P (third-party inference; also described as Claude 3P in our detailed article): inference is routed via an MDM profile through AWS Bedrock or Google Vertex AI in EU regions – the app stays the same, the data stays in controlled EU infrastructure. How that works technically is covered in our article Claude Cowork & Claude Code GDPR-compliant with CompanyGPT.

Why Cowork Is the Ideal Complement to CompanyGPT

The most interesting question is not “Copilot or Cowork?” but: how does an agent fit into a controlled enterprise AI landscape? Our answer is a two-level architecture:

Level 1 – the governed org platform for everyone: CompanyGPT runs in the company’s own cloud subscription, browser-based for every employee. Central model routing across OpenAI, Gemini, Claude and Llama, knowledge integration with SharePoint permissions via companyRAG, document creation via companyFILES, cost and usage transparency via companyDASHBOARD. Data stays in the company’s own tenant, governance is auditable.

Level 2 – the agent for power users: Selected user groups – controlling, sales, project management – get a tool with Cowork that takes over entire tasks instead of just answering. Turning receipts into an expense report, consolidating twenty supplier PDFs into one Excel spreadsheet, drafting a report from interview notes – tasks for which a chat window is the wrong tool.

For CompanyGPT customers, the step to level 2 is remarkably small: the cloud foundation that Cowork 3P requires for a sovereign Cowork setup already exists – their own Azure, AWS or Google tenant, EU endpoints, IAM structures, cost centres and documented AI governance. Cowork is routed through it instead of opening a second, uncontrolled data path. Organizations deeply invested in the M365 world can fill the same role with Copilot Cowork – then with Microsoft governance made of admin opt-in, audit logs and sensitivity labels.

Either way, the division of labour stays the same: the platform belongs to the company, the agent to the power user. Cowork replaces CompanyGPT about as much as a cordless screwdriver replaces the workshop – but combined, both become considerably more valuable.

Decision Guide: Who Needs What?

• You want AI support directly in Word, Excel and Outlook, centrally administered? Microsoft 365 Copilot is the obvious start – with flex routing disabled and a deliberate model choice.
• You want agentic task completion within M365 governance? Copilot Cowork, enabled via admin opt-in for defined groups.
• You want maximum agent autonomy on files – GDPR-compliant? Claude Cowork via Cowork 3P with EU endpoints, rolled out via MDM.
• You want a sovereign, model-agnostic foundation for the entire workforce? CompanyGPT in your own cloud – as the foundation the agent level builds on cleanly.

In practice we most often see the combination: CompanyGPT for the breadth, Cowork for selected power users, Copilot where Office integration tips the scales.

Frequently Asked Questions About Microsoft Copilot and Cowork

What is the difference between Microsoft Copilot and Cowork? Copilot is an assistant that responds to prompts and delivers drafts. Cowork is an agent that receives a goal, plans on its own and delivers finished results – as Claude Cowork by Anthropic or as Copilot Cowork by Microsoft, built on Claude Cowork technology.

What is Copilot Cowork? Microsoft’s agentic product within Microsoft 365 Copilot, generally available since June 16, 2026: cloud-based sandbox, Work IQ context, checkpoints, audit logging, disabled by default and enabled by the admin. Billed via Copilot license plus Copilot Credits.

What does Microsoft 365 Copilot cost in 2026? Copilot Chat is included in eligible M365 plans; the SMB add-on Copilot Business is listed at €21.84 per user per month on the German pricing page (monthly billing) or €15.60 as a promotional annual price (regular €18.20), the enterprise add-on at €28.10, excl. VAT. Microsoft’s current information is authoritative.

How do you enable Copilot Cowork? Via usage-based billing in the Microsoft 365 admin center (Copilot → Cost Management): choose the payment path, set spending limits per tenant, group or user. In the EU, EFTA and UK, Anthropic must additionally be enabled as a subprocessor via opt-in – it is not by default.

Is Cowork GDPR compliant? With precautions: route Claude Cowork via Cowork 3P through EU endpoints, use Team/Enterprise plans (no training on customer data), set folder approvals and domain allowlists conservatively. For Copilot Cowork, the Microsoft framework applies, including the flex-routing and EU Data Boundary topics – in the EU, Cowork requires a documented Anthropic opt-in.

Does Cowork replace CompanyGPT? No. Cowork is the power-user level at the individual workplace, CompanyGPT the governed platform for the entire organization. CompanyGPT customers reuse their existing cloud foundation directly for Cowork via Cowork 3P.

Conclusion

Microsoft Copilot, Copilot Cowork and Claude Cowork mark the same shift from two directions: assistants that answer are becoming agents that get things done. Microsoft brings M365 governance to the table, Anthropic the most mature agent experience – and the fact that Microsoft integrated the technology behind Claude Cowork into its own product says a lot about the balance of power.

For companies, the order matters: first the sovereign platform level, then the agent level – with clear approvals, EU routing and an AI policy that governs autonomy. That is exactly the setup we have been building in practice with CompanyGPT and Claude 3P for months. If you want to know how Copilot, Cowork and CompanyGPT play together in your environment, talk to us.

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Tobias Jonas is Founder of innFactory AI Consulting GmbH and innFactory GmbH, Microsoft Cloud Solution Provider and Google Cloud Partner. He advises companies on the secure and sovereign adoption of AI. LinkedIn profile