Microsoft Copilot for Business vs ChatGPT Enterprise – which AI tool does your company need?
Erwin Berkouwer
Microsoft Copilot for M365 or ChatGPT Enterprise? Discover the differences in pricing, security, and integrations and which AI tool works best for your SMB.
Microsoft Copilot for Microsoft 365 and ChatGPT Enterprise are the two leading business AI tools today. Copilot integrates deeply into your existing Microsoft environment; ChatGPT Enterprise is a powerful, flexible assistant that works with almost any system. Which fits your business best? This article explains the differences clearly.
What is Microsoft Copilot for Microsoft 365?
Microsoft Copilot for Microsoft 365 is an AI assistant built directly into the tools you probably use every day: Outlook, Word, Excel, PowerPoint, and Teams. What's unique about Copilot is that it has access to your business data through Microsoft Graph — your emails, documents, calendar, and meeting notes — without you having to provide them manually.
Say you want a summary of a Teams meeting you missed yesterday. You open Teams, ask Copilot for a summary, and within ten seconds you have the action items listed. No handwritten notes, no rewinding the recording.
Or take another example: your financial manager opens Excel with quarterly figures and asks Copilot to flag variances. Copilot analyzes the data and provides a report in plain language — no formulas, no pivot tables.
Price: Microsoft Copilot normally costs €30 per user per month (on top of your existing Microsoft 365 license). In 2026, there's a promotional period where SMBs pay €15.60 per user per month.
Requirement: You need at least a Microsoft 365 Business Standard license.
What is ChatGPT Enterprise?
ChatGPT Enterprise is the business version of ChatGPT from OpenAI — specifically designed for organizations that prioritize privacy, security, and scalability. You work in a secure, isolated environment separate from the public ChatGPT servers.
Unlike Microsoft Copilot, ChatGPT Enterprise is not tied to one ecosystem. It works via a web interface and APIs, and offers more than 60 integrations with tools like Slack, Google Drive, SharePoint, GitHub, and Atlassian. So you can use ChatGPT in workflows that span multiple systems.
ChatGPT Enterprise runs on the latest GPT model and provides unlimited message limits. Ideal if your employees use AI intensively for writing, analysis, and brainstorming.
Price: Enterprise uses a custom pricing model — you negotiate directly with OpenAI. As entry points, there are business subscriptions: ChatGPT Team costs about €25 per user per month (for teams of 2 to 149 users). Enterprise is aimed at larger organizations (150+ users) or those with strict compliance requirements.
Compliance: SOC 2 Type 2 certified, SAML SSO, GDPR compliant, no use of your data for model training.
Comparison: pricing, security, integrations, and usage
| Feature | Microsoft Copilot for M365 | ChatGPT Enterprise |
|---|---|---|
| Pricing | €15.60–€30/user/month | Custom quote (Team: ~€25/user/month) |
| Data security | Within your Microsoft tenant | Isolated enterprise environment |
| Model training | No | No |
| Compliance | Microsoft 365 standards | SOC 2, SAML SSO, GDPR |
| Integrations | Deep in Office apps | 60+ external tools |
| Access to business data | Automatic via Microsoft Graph | Manual upload or via API |
| Best for | Office-heavy workflows | Flexible, varied AI tasks |
| Minimum users | 1 | 2 (Team), 150+ (Enterprise) |
Security
Both platforms guarantee your data won't be used to train AI models. Copilot processes everything within your Microsoft tenant — data never leaves your environment. ChatGPT Enterprise processes data in an isolated server environment and offers additional data residency options in Europe on request.
Real-world usage
Microsoft Copilot shines in structured office processes: summarizing meetings, drafting emails, creating reports in Word or PowerPoint, analyses in Excel. Everything within the Microsoft universe runs smoothly.
ChatGPT Enterprise is more broadly applicable: writing content for multiple channels, technical documentation, processing client inquiries, generating code, data analysis outside Excel. It's less tied to one platform and therefore more flexible for mixed IT environments.
When do you choose Copilot? When ChatGPT?
Choose Microsoft Copilot if:
- Your team works intensively with Outlook, Teams, Word, and Excel
- Your company already has a Microsoft 365 subscription
- Your employees meet frequently and want to automate note-taking
- Your IT team values all-in-one security within Microsoft
Example: A construction company with 40 employees uses Teams and Outlook exclusively. Project managers hold meetings via Teams and want automatic summaries per project. Copilot is the logical choice — it integrates directly into their existing workflow without additional tools.
Choose ChatGPT Enterprise if:
- You have a diverse IT environment (no Microsoft or partial Microsoft)
- Your team needs AI for creative tasks, content strategy, or customer communication
- You work with external tools like Google Workspace, Slack, or Atlassian
- You want more flexibility in how you deploy AI through custom prompts and workflows
Example: A marketing agency with 25 employees uses Google Workspace, works in Slack, and creates content daily for ten clients. ChatGPT Enterprise fits better here — it works seamlessly with their existing tools and supports creative writing tasks.
Combining: is that possible?
Absolutely — and it's actually popular. Many SMEs opt for a hybrid approach:
- Copilot for internal processes: meeting summaries, emails, reports in Office
- ChatGPT for external tasks: marketing, client communication, strategic writing
Combining both tools gives you the best of both worlds. The costs are higher, though: you pay two subscriptions. So make sure you map out per team what AI is actually used for, to avoid paying double for features only one team uses.
Practical tip: Start with one tool — preferably the one that best fits your existing environment. After three months, evaluate usage and decide if the second tool adds value.
Frequently asked questions
What's the difference between Microsoft Copilot and ChatGPT Enterprise?
Microsoft Copilot is deeply integrated into Microsoft 365 apps (Outlook, Teams, Word, Excel) and automatically accesses your business data via Microsoft Graph. ChatGPT Enterprise is a flexible AI assistant that works via a secure environment and integrates with 60+ external tools. Copilot is ideal for Office-heavy environments; ChatGPT Enterprise is more broadly applicable.
Which is more secure: Copilot or ChatGPT Enterprise?
Both are secure for business use. Copilot processes data within your Microsoft tenant and meets Microsoft 365 compliance standards. ChatGPT Enterprise is SOC 2 Type 2 certified and GDPR compliant. Neither uses your data for model training.
What does Microsoft Copilot for Microsoft 365 cost?
Standard pricing is €30 per user per month, on top of your existing Microsoft 365 license. In 2026, promotional offers for SMBs may lower the price to €15.60 per user per month.
Does my company need technical knowledge to deploy Copilot or ChatGPT Enterprise?
No — for daily use, no technical knowledge is required. Copilot appears automatically in your familiar Microsoft apps. ChatGPT Enterprise works via a simple web interface. For advanced integrations (API connections, custom workflows), technical knowledge or implementation partner help is needed.
Can I try before subscribing?
Microsoft offers a trial period for Copilot via your existing Microsoft 365 admin environment. OpenAI offers demos and trials for ChatGPT Enterprise on request. It's smart to start with a pilot group of 5 to 10 employees and evaluate value after six weeks.
