In short: If your business runs on Microsoft 365, Copilot is the more valuable primary AI tool - it works inside the apps your team already uses, operates within your security boundary, and connects to your organisational data. ChatGPT is more flexible and suited to open-ended, creative, or platform-agnostic tasks. These tools are not mutually exclusive: the most effective approach for most Microsoft-first UK businesses is Copilot as the operational AI and ChatGPT as a supplementary creative tool - with clear internal guidance on what not to put into either.
ⓘ Note on shared foundations: both Microsoft Copilot and ChatGPT use OpenAI’s large language models - Microsoft is a major investor in OpenAI and integrates OpenAI technology directly into its products. The difference is not in the underlying AI model but in how it is accessed, what data it connects to, and what security and governance controls apply.
Feature comparison at a glance
This comparison focuses on business use. Both products have consumer and enterprise tiers — the table reflects the versions most relevant to UK SMEs.
| Microsoft 365 Copilot | ChatGPT (Teams / Enterprise) | What this means for your business | |
|---|---|---|---|
| Where it lives | Inside Microsoft 365 apps Word, Excel, Outlook, Teams, PowerPoint |
Standalone browser / app API integrations available |
Copilot requires no context switching — it’s already in your tools |
| Access to your org data | Yes — via Microsoft Graph Emails, meetings, documents, calendar |
Only what you manually provide | Copilot can summarise your actual meetings and find your actual documents |
| Security & data governance | Within your Microsoft boundary Respects existing permissions |
Separate platform Teams/Enterprise: no training on inputs |
Copilot is safer for sensitive business data; ChatGPT needs clear governance |
| GDPR / data residency | Within your Microsoft 365 data residency (UK/EU) | OpenAI UK data storage improving; check current terms | Copilot preferred for regulated industries and sensitive data |
| Pricing | Copilot Chat: included with M365 Full M365 Copilot: paid add-on |
Free tier available Teams from ~£20/user/month Enterprise: custom |
Entry-level ChatGPT is free; full Copilot requires M365 add-on investment |
| Creative & open-ended tasks | Capable within M365 context | Stronger More flexible for brainstorming and ideation |
ChatGPT tends to outperform on creative, exploratory, and cross-platform tasks |
| Coding assistance | Via GitHub Copilot (separate product) | Strong built-in Code generation and debugging |
ChatGPT or GitHub Copilot for developers; M365 Copilot for business users |
| AI in meetings | Native Teams integration Summaries, actions, catch-ups |
Via API or third-party integrations | Copilot’s meeting intelligence is a standout feature for Teams users |
| Works without Microsoft 365 | No | Yes — platform agnostic | ChatGPT is the only viable option for non-Microsoft organisations |
| Most businesses should | Use both with clear internal guidelines on appropriate use | They complement rather than replace each other | |
Understanding each tool
Microsoft 365 Copilot
Copilot is Microsoft’s AI assistant embedded across the Microsoft 365 suite. Rather than a separate tool, it appears inside Word, Excel, Outlook, Teams, and PowerPoint — helping users draft, summarise, analyse, and automate without leaving the application they are already working in. Its distinctive advantage is access to your organisational data via the Microsoft Graph: it can summarise email threads, generate meeting notes from Teams calls, surface relevant documents, and draft responses with full context of your business.
- Summarise Teams meetings and generate action items automatically
- Draft Outlook emails with context from prior correspondence
- Analyse Excel data and generate charts from natural language prompts
- Create first-draft PowerPoint presentations from a brief
- Operates within your existing Microsoft permissions and compliance boundary
ChatGPT (Teams / Enterprise)
ChatGPT is OpenAI’s standalone AI assistant, accessible via browser, mobile app, and API. It excels at open-ended tasks: drafting content, brainstorming, analysing information provided in the chat, coding support, and working across platforms that don’t use Microsoft 365. ChatGPT Teams and Enterprise plans ensure your inputs are not used to train OpenAI’s models, making them more suitable for business use than the free tier.
- Strong at creative writing, ideation, and exploratory problem-solving
- Platform-agnostic — useful across Google Workspace, Salesforce, and other tools
- Coding assistance and debugging for technical teams
- Customisable GPTs for specific business workflows (Enterprise)
- Free tier available for low-sensitivity use cases
Practical use cases: which tool for which task?
Copilot — it reads the thread and drafts with full context in Outlook.
Copilot — native integration generates notes and actions automatically.
ChatGPT — more flexible and generative for open creative tasks.
Copilot — works directly in Excel with your actual data file.
Either — Copilot if working from internal documents; ChatGPT if starting from scratch.
ChatGPT or GitHub Copilot — stronger for developer use cases.
Copilot — stays within your Microsoft governance boundary.
Either — ChatGPT often more flexible for exploratory research.
Which tool fits your business?
Prioritise Microsoft Copilot if…
- Your team uses Microsoft 365, Teams, and Outlook as primary tools
- Meeting notes, email drafting, and document summarisation are priority use cases
- You handle sensitive business data and need AI within your governance boundary
- You are in a regulated industry (financial services, healthcare, legal)
- You want AI that works inside the tools your team already knows
- You are deploying Business Central or Dynamics 365 and want AI across the stack
Prioritise ChatGPT if…
- Your team works across multiple platforms beyond Microsoft 365
- Creative, brainstorming, and exploratory tasks are your primary AI use
- You need coding assistance or technical AI capabilities
- You want to start with a free tier before committing to paid AI tooling
- Your organisation does not use Microsoft 365 as its primary productivity suite
Frequently Asked Questions — Microsoft Copilot vs ChatGPT
Common questions from UK businesses evaluating Microsoft Copilot and ChatGPT - answered by Advantage, Microsoft Solutions Partner and Microsoft Copilot deployment specialist.
Is Microsoft Copilot better than ChatGPT for business?
For businesses already using Microsoft 365, Copilot is typically the stronger primary business AI tool — it works inside the apps your team already uses, operates within your existing security and compliance boundary, and connects to your organisational data without requiring manual uploads or context switching. For open-ended, creative, or platform-agnostic tasks, ChatGPT is more flexible.
Most Microsoft-first UK businesses benefit from using both with clear internal guidelines: Copilot for operational, in-the-flow tasks and ChatGPT as a supplementary tool for creative work. Advantage can help you assess where each tool adds the most value for your specific team.
Do Microsoft Copilot and ChatGPT use the same AI?
Both use OpenAI’s large language models — Microsoft is a major investor in OpenAI and integrates OpenAI technology including GPT-4 and its successors into Microsoft Copilot. The difference is not in the underlying model but in how it is accessed and applied.
Copilot applies the model within the Microsoft 365 environment, with access to your organisational data from emails, meetings, documents, and calendar, governed by your existing Microsoft permissions. ChatGPT applies the same model in a standalone interface without that organisational context unless you manually provide it.
Is Microsoft Copilot secure for business use?
Yes — Microsoft 365 Copilot operates within your existing Microsoft security and compliance boundary. It respects your organisation’s permissions model (Copilot cannot surface documents a user does not have access to), does not use your data to train Microsoft’s AI models, and stores data in line with your Microsoft 365 data residency settings.
This is a significant governance advantage over using standard ChatGPT with sensitive business data. For UK businesses with GDPR obligations or regulated data, Copilot’s security model is considerably more robust out of the box — though it is still important to ensure data permissions within your Microsoft 365 environment are properly configured before deployment.
What is the difference between Microsoft Copilot and Microsoft 365 Copilot?
Microsoft Copilot Chat is a free AI assistant available to Microsoft 365 users via the web, mobile, and within Teams — providing general AI assistance with commercial data protection included. It is a good starting point for businesses beginning to adopt AI.
Microsoft 365 Copilot is the premium paid add-on that embeds AI directly into Word, Excel, Outlook, PowerPoint, and Teams with full access to your organisational data via the Microsoft Graph. This is where the most significant productivity gains come from: meeting summaries, email drafting with full thread context, Excel analysis, and document generation from your own content. Advantage can advise on the right licence tier and help with readiness before deployment.
Can I use ChatGPT safely in my business?
Yes, with appropriate guidelines in place. The key points are: do not input sensitive customer data, confidential business information, or anything covered by GDPR or regulatory requirements into the free ChatGPT tier; use ChatGPT Teams or Enterprise plans for enhanced privacy (these do not use inputs to train OpenAI’s models); and establish clear internal guidance on what is and is not appropriate to share with an external AI tool.
Many UK businesses use ChatGPT productively within these boundaries, particularly for tasks that do not involve sensitive data. The free tier is a reasonable starting point for teams learning to use AI effectively.
Does Advantage help businesses deploy Microsoft Copilot?
Yes — Advantage helps UK SMEs plan, deploy, and adopt Microsoft Copilot, including readiness assessments, data governance preparation, licence configuration, and user training. We run Microsoft Copilot workshops to help organisations identify high-value use cases and ensure the underlying Microsoft 365 environment is ready before committing to full deployment.
Rushing Copilot deployment without governance preparation is one of the most common mistakes organisations make — surfacing documents to users who should not see them. Advantage’s readiness-first approach avoids this. Learn more about our Microsoft 365 Copilot services or call 020 3004 4600.
