Side-by-Side Comparison · 2026

Microsoft Copilot 365 vs Grammarly: Full Comparison (2026)

Microsoft Copilot 365 is ai assistant embedded across the microsoft 365 suite. Grammarly is ai writing assistance for clarity, tone, and correctness. Use the breakdown below to find the right fit for your needs.

Microsoft Copilot 365

Microsoft

Enterprise
vs

Grammarly

Grammarly

Freemium
This page presents factual information sourced from publicly available vendor documentation and product pages. AIHub does not endorse either product. The right tool depends on your specific use case, team, and requirements — we recommend evaluating both tools directly before making a decision.

Side-by-Side Overview

Pricing Model
Microsoft Copilot 365: EnterpriseGrammarly: Freemium
API Access
Microsoft Copilot 365: AvailableGrammarly: Not available
Platforms
Microsoft Copilot 365: Word, Excel, PowerPoint, Outlook, Teams, SharePoint, Loop, OneNote, Planner, Windows 11 (Copilot+)Grammarly: Chrome Extension, Firefox Extension, macOS App, Windows App, iOS, Android, MS Word Plugin, Google Docs
Integrations
Microsoft Copilot 365: 6 integrationsGrammarly: 7 integrations
Vendor
Microsoft Copilot 365: MicrosoftGrammarly: Grammarly
Category
Microsoft Copilot 365: ProductivityGrammarly: Productivity
Launch
Microsoft Copilot 365: Nov 1, 2023Grammarly: 2009 (full AI features 2022–2023)
Models
Microsoft Copilot 365: GPT-6 Sol, GPT-6.1 SolGrammarly: Proprietary BERT-based grammar models, GPT-4.1 (GrammarlyGO generative features)

About Microsoft Copilot 365

Microsoft 365 Copilot integrates OpenAI GPT-6 and Anthropic Claude models into Word, Excel, PowerPoint, Outlook, and Teams. Automates document creation, data analysis, email drafting, and meeting summaries.

Designed For

  • Document creation
  • Data analysis in Excel
  • Email drafting
  • Meeting summarization
Full Microsoft Copilot 365 details

About Grammarly

Grammarly uses AI to check grammar, spelling, punctuation, clarity, engagement, and delivery in real-time across browsers, apps, and documents.

Designed For

  • Professional emails
  • Academic writing
  • Blog posts
  • Business documents
Full Grammarly details

Strengths & Limitations

Microsoft Copilot 365

Strengths

  • Deep M365 integration
  • Enterprise security
  • Works in existing tools

Limitations

  • $30/user/month
  • Requires M365 subscription
  • Enterprise only

Grammarly

Strengths

  • Works everywhere
  • Tone detection
  • Free tier useful

Limitations

  • Premium required for best features
  • Can over-suggest

Frequently Asked Questions

What is the difference between Microsoft Copilot 365 and Grammarly?

Microsoft Copilot 365 is ai assistant embedded across the microsoft 365 suite, while Grammarly is ai writing assistance for clarity, tone, and correctness. Microsoft Copilot 365 is designed for Enterprise Microsoft 365 users, Finance teams; Grammarly is designed for Professionals, Students. The right fit depends on your specific requirements.

How do the pricing models compare?

Microsoft Copilot 365 is available under a Enterprise model. Grammarly is available under a Freemium model. Microsoft Copilot 365's entry tier starts at $30/user/mo. Grammarly's entry tier starts at $0/mo. Always verify pricing on each vendor's official website as it may change.

What integrations does each tool support?

Microsoft Copilot 365 integrates with Microsoft 365 ecosystem, Azure AD/Entra ID, Salesforce (Copilot connector), ServiceNow. Grammarly integrates with Microsoft Word, Google Docs, Gmail, Outlook. Check each vendor's documentation for the full and current list.

How do I choose between Microsoft Copilot 365 and Grammarly?

Consider your team's technical requirements, budget, existing tooling, and use case before deciding. We recommend signing up for free trials or demos of both tools where available, and consulting each vendor's documentation. AIHub provides this comparison for informational purposes only.