ChatGPT vs Copilot in 2026: which one fits your business?

ChatGPT and Microsoft Copilot are not the same fight

Many SMB leaders frame "ChatGPT or Copilot" as two direct competitors. That is not quite right. ChatGPT is a standalone product that also runs in browsers, mobile apps and plug-ins. Microsoft 365 Copilot is a layer on top of your existing Office workspace. They are different answers to different questions, even though they partly share the same GPT-4 model underneath.

For a Dutch organisation choosing one or weighing both, the relevant questions are: where do you work today, what do you already pay for, how often do you write in Office, and how strict are your GDPR requirements? This article gives an honest comparison with those as compass. For an earlier guide on this topic see also Microsoft Copilot or ChatGPT.

Where do they live?

Microsoft 365 Copilot lives inside Word, Excel, PowerPoint, Outlook, Teams, OneNote and SharePoint. It sees your emails, calendar, Teams chats, the files in your SharePoint and OneDrive. Ask "summarise last week's discussion about Project Apollo" and it knows which discussion you mean without you pasting context.

ChatGPT (Plus, Team, Enterprise) is a separate web and desktop app. It does not know your files by default. You paste context, upload documents, or connect via API and plug-ins. It is more general and broader, but not natively embedded in your workflow.

For an SMB team spending eighty percent of the day in Office, that gap matters. Writing a quote in Word with automatic pull from earlier quotes saves half an hour each. The same in ChatGPT requires you to paste relevant context every time.

Where are they strong?

Copilot is strong wherever your Office data is itself the source:

• Summarising Outlook emails and drafting replies
• Writing or rewriting Word documents with your prior style as reference
• Generating Excel formulas and data analysis on your sheets
• Building PowerPoint decks from a briefing document
• Summarising Teams meetings with action items and owners
• Answering SharePoint searches across your company knowledge

ChatGPT is strong wherever you work openly without your files being the source:

• Brainstorming and strategic analysis without business data context
• Marketing copy, ads, social media content
• Writing, debugging and reviewing code (especially via API or Codex)
• Image generation via DALL-E
• Voice mode for spoken interaction
• Custom GPTs (mini-bots) you share with your team
• Broad research via tools and plug-ins

For most SMB teams: Copilot for the work already happening in Office, ChatGPT for the broad creative and strategic work around it.

Pricing

Microsoft 365 Copilot: roughly 30 USD per user per month, on top of your existing M365 E3 or E5 license. For a team of 10 that is about 300 USD/month for Copilot, plus the M365 base you were already paying. Microsoft now has lighter variants like Copilot Pro for solo users and Copilot Business; check current pricing because Microsoft keeps shifting it.

ChatGPT Team: 25-30 USD per user per month. ChatGPT Enterprise: custom, typically higher. ChatGPT Plus for solo users: 20 USD/month.

Pure tooling cost is therefore similar. The difference is the M365 assumption: do you already have M365 E3/E5? Then Copilot is an add-on. No M365? You cannot buy Copilot without first taking the whole Microsoft stack, and then you are talking significantly higher TCO.

Governance and admin

Microsoft wins here. Copilot sits in the same admin layer as the rest of M365. Identity (Entra ID), DLP, audit logs, retention policies and eDiscovery all play along. For IT teams already living entirely on M365 governance, Copilot is an extension of existing controls.

ChatGPT Team and Enterprise have workspaces, SSO, data controls (no training use), and audit logs, but they sit alongside your IT stack, not inside it. For a 10-person SMB that is no problem; for a 100+ person organisation with strict IT governance it costs more integration work.

Dutch language

Both run on GPT-4 (and successors) underneath. NL quality is comparable. In practice clients note Copilot writes a touch more formal and businesslike (matching the Office context), where ChatGPT is freer and more varied. Both carry the well-known ChatGPT tics ("leverage", "stakeholder") you can soften with prompting.

For a tone matching Dutch SMB brands (more informal, more direct, regional where it fits) both need systematic prompting. Or pick another model: see ChatGPT vs Claude for the Claude comparison and ChatGPT in Dutch for the broader context.

GDPR and EU hosting

Microsoft 365 Copilot runs by default on Azure with EU data residency for business customers. GDPR-compliant out of the box for M365 E3/E5 tenants. For SMBs with data sovereignty concerns that saves time and contract work.

ChatGPT is hosted in the US by default. EU data residency exists since 2025 but only on ChatGPT Enterprise, ChatGPT Edu and the API. For ChatGPT Plus and Team it remains US-hosted. Since Plus, input is no longer used for model training; that addresses one concern but not where the data physically sits.

For healthcare, legal or financial work where residency is hard: Copilot wins on the standard tier. ChatGPT requires Enterprise tier or API deployment.

Agents and automation

Microsoft has Copilot Studio (low-code agents in Power Platform). Strong for M365-stack organisations, with caveats around per-message billing and agentic capabilities. Full breakdown in our Copilot Studio guide.

OpenAI has GPTs (custom assistants), AgentKit and Operator. Broader ecosystem if you want to build agents not tied to M365. For deeper agentic workflows with own tools and data ChatGPT is currently a step ahead.

For the broader agent approach see /en/ai-agents.

When do you pick which?

Pick Microsoft 365 Copilot when your organisation runs entirely on M365, your IT team wants tight governance, and your work happens daily in Word, Excel, Outlook and Teams. Copilot then pays back in time saved in Office within three months.

Pick ChatGPT (Team or Enterprise) when your work is largely open and creative, your team does broader work than just Office, you need image generation or voice AI, or you do not have an M365 stack and do not want one.

Pick both when you are serious about AI in a Microsoft organisation. Many of our clients run Copilot for the Office flow and ChatGPT Team alongside for strategic, creative and agent work. The extra 20-30 USD per user is negligible against the productivity gain.

Three scenarios from client practice

Scenario 1: a Dutch logistics SMB. Fully on M365, 80 staff, heavy dependency on Outlook and Excel. Copilot for everyone actively working in Office; ChatGPT Team for the five-person marketing team doing image and social content. Total: 80 Copilot licenses + 5 ChatGPT Team seats. The investment pays back in Outlook-summary time saved alone within four months.

Scenario 2: a Zeeland communications agency. No M365 (runs on Google Workspace), 12 staff, writing and visuals are core. ChatGPT Team for everyone, plus Claude Pro in parallel for seniors handling heavy editorial. Copilot plays no role because the M365 stack is missing.

Scenario 3: a notary firm. M365 stack, strict GDPR requirements, sensitive client documents. Copilot with EU data residency from M365 is the base; ChatGPT only on Enterprise tier for specific research tasks falling outside own data. No ChatGPT Plus or Team where US hosting is still default.

Not a tribal choice

ChatGPT vs Copilot is in 2026 less a fight between rivals than a fit-with-your-work question. Most organisations we coach experience both tools as complementary, not substitutes. The real question is not "which model is better" but "where is our work and which model solves that".

Want help shaping stack choice, prompt library and team training? See /en/ai-strategie for the approach and /en/ai-training for the skills build. For a free use-case scan: Schedule a free discovery call.