Copilot vs. ChatGPT vs. Google Duet AI–
As generative AI redefines the enterprise software landscape, CTOs and technology leaders face a pressing question: which AI assistant is right for my organization? With Microsoft Copilot, ChatGPT Enterprise, and Google Duet all promising to boost productivity, automate tasks, and unlock knowledge at scale, decision-makers must navigate a rapidly evolving market where technology, ecosystem alignment, and governance are critical factors.
This guide breaks down the key differences between Microsoft Copilot, OpenAI’s ChatGPT, and Google Duet—highlighting strategic considerations, security models, integrations, and ROI implications—to help IT leaders and consulting advisors make the right call for their enterprise AI strategy.
The Three Titans: What They Offer (Copilot vs. ChatGPT vs. Google Duet)
1. Microsoft Copilot (Microsoft 365, GitHub, Power Platform, Dynamics)
Microsoft Copilot is not one assistant—it’s a suite of AI copilots embedded across Microsoft products, including:
- Microsoft 365 Copilot: in Word, Excel, PowerPoint, Outlook, and Teams
- GitHub Copilot: for software developers
- Copilot Studio: to create custom copilots and agents
- Security Copilot, Dynamics 365 Copilot, and more
Copilot’s unique value lies in its deep integration with Microsoft Graph, which gives it access to enterprise data from SharePoint, Teams, Outlook, and other Microsoft sources—subject to each user’s permissions.
2. OpenAI ChatGPT (Pro, Team, Enterprise)
ChatGPT is the most flexible of the three, accessible via browser or API, with the GPT-4o model powering the experience. It supports:
- Conversational interactions for ideation, content generation, coding
- Custom GPTs and plug-ins for vertical use cases
- Integrations via OpenAI API or Azure OpenAI Service
The Enterprise version offers enhanced security, admin controls, and SSO, making it safer for business use. However, ChatGPT is a standalone app, not embedded in enterprise workflows.
3. Google Duet AI (Workspace)
Duet AI is Google’s productivity assistant embedded in Gmail, Docs, Sheets, Meet, and Slides. It offers:
- Real-time transcription and summarization
- Smart reply, writing aids, and data analysis
- Integration with Google Cloud and Vertex AI
Duet is most attractive to enterprises already built around Google Workspace, offering AI-native productivity experiences similar to Microsoft Copilot—but without Microsoft Graph’s enterprise knowledge backbone.
Integration & Ecosystem Fit
The first question any CTO or consulting advisor should ask: Which ecosystem does the organization already rely on?
Microsoft Copilot:
✅ Best suited for enterprises heavily invested in Microsoft 365, Teams, SharePoint, and Azure.
✅ Offers context-aware assistance, leveraging organizational data securely.
✅ Seamless for employees already using Office tools.
⚠️ Requires Microsoft 365 E3/E5 licenses + $30/user/month add-on for Copilot.
ChatGPT:
✅ Great for cross-platform ideation, coding, and R&D workflows.
✅ Offers flexibility and advanced reasoning capabilities.
⚠️ Requires careful integration for enterprise data access (via APIs, plugins, or Azure OpenAI).
⚠️ Data isolation is solid in Enterprise version, but less embedded in day-to-day work apps.
Google Duet:
✅ Ideal for companies running Google Workspace (Gmail, Docs, etc.).
✅ Good at creative content generation, brainstorming, and summarizing.
⚠️ Limited if your org uses Microsoft tools—no integration with SharePoint, Teams, etc.
⚠️ Fewer enterprise-specific AI governance controls than Microsoft.
Verdict:
- Microsoft Copilot wins in Microsoft-centric organizations.
- ChatGPT offers best-in-class general intelligence, but requires more scaffolding.
- Duet AI is a solid pick for Google-native orgs, but lags in business-data awareness.
Security, Privacy & Governance (Copilot vs. ChatGPT vs. Google Duet )
AI adoption isn’t just about output—how you protect your data and control access is crucial.
| Feature | Microsoft Copilot | ChatGPT Enterprise | Google Duet AI |
| Data isolation | Enforced via Microsoft Graph | Enterprise-grade encryption | Workspace-based |
| Compliance (e.g. GDPR) | EU-compliant, Microsoft Purview | SOC 2, GDPR, CCPA | Complies with Workspace policies |
| Role-based access | Native to Azure AD | Controlled via admin console | Workspace-level controls |
| Prompt/data retention | No storage outside tenant | Not stored for training | Not used for model training |
| Enterprise policy control | Extensive | Moderate | Moderate |
Microsoft Copilot shines in enterprise-grade governance. Data never leaves your tenant, user permissions are respected, and tools like Purview allow CIOs to monitor and audit usage. ChatGPT Enterprise also does well here, but needs integration for secure access to internal documents. Google Duet offers fewer admin tools and lacks the extensibility of Microsoft Purview.
Verdict:
For regulated industries, Microsoft Copilot provides the most robust governance and compliance stack.
Use Cases and Productivity Impact (Copilot vs. ChatGPT vs. Google Duet )
Each tool shines in different contexts:
| Use Case | Best Tool | Why |
| Writing & editing content | Copilot / Duet | Both integrate with office tools; Copilot is more enterprise-aware |
| Coding | GitHub Copilot / ChatGPT | GitHub Copilot dominates dev workflows; ChatGPT excels in flexible logic |
| Meeting summaries & actions | Microsoft Copilot | Deep Teams integration, real-time AI notes & tasks |
| Data analysis in spreadsheets | Excel Copilot | Copilot in Excel suggests formulas, insights, trends |
| Customer support enhancement | Copilot Studio | Build internal agents with enterprise data access |
| Cross-platform brainstorming | ChatGPT | Strong for ideation, open-ended prompts |
Copilot is purpose-built for everyday productivity inside Microsoft apps. ChatGPT offers more flexibility across disciplines, while Duet is limited to Workspace.
Pricing & Scalability (Copilot vs. ChatGPT vs. Google Duet )
| Tool | Base Price (Enterprise) | Notes |
| Microsoft Copilot | $30/user/month (add-on) | Requires Microsoft 365 E3/E5 license |
| ChatGPT Enterprise | Custom pricing (~$30-$60/user) | Volume pricing available |
| Google Duet AI | $30/user/month | Requires Google Workspace |
Microsoft and Google both price their copilots at $30/user/month—a significant cost, especially at scale. ChatGPT Enterprise offers flexible pricing, but often at a premium for advanced capabilities.
CTOs are increasingly using “pilot first, expand later” models—deploying Copilot to a few departments (e.g. finance, HR) to measure ROI before full rollout. Microsoft also offers app-specific Copilot versions (e.g. Teams-only Copilot) to reduce entry costs.
Final Recommendation: Which Should You Choose? (Copilot vs. ChatGPT vs. Google Duet )
🟢 Choose Microsoft Copilot if…
- Your organization already runs on Microsoft 365, SharePoint, Teams, or Azure.
- You need strict compliance, role-based access, and integrated data governance.
- You want a scalable AI layer across productivity, development, and automation.
🟡 Choose ChatGPT Enterprise if…
- You want maximum flexibility and open-ended generation across disciplines.
- Your teams are already using ChatGPT informally and need a sanctioned, secure version.
- You have the capacity to build integrations to internal data and workflows.
🔵 Choose Google Duet AI if…
- Your org is built on Google Workspace.
- You’re looking for simple writing, summarizing, and meeting tools.
- You don’t need deep Microsoft integrations or custom AI agents.
Final Thought: It’s Not All or Nothing
Many enterprise CTOs are adopting a multi-AI strategy—using Microsoft Copilot for structured productivity, ChatGPT for exploratory tasks, and other AI tools for niche needs. The key is governance: whichever AI you adopt, ensure it’s secured, trained on safe data, and aligned to business outcomes.
In this new AI era, your AI stack is your competitive edge. The right Copilot is not just a productivity booster—it’s a strategic enabler for the future of work.
At PowerFy, the team is ever ready to brainstorm with you. Get in touch
