AI Tool Comparison

Copilot for Microsoft 365 vs Gemini

An objective side-by-side comparison based on global rankings, AI scores, and monthly user data.

Higher Ranked

Copilot for Microsoft 365

Productivity

AI assistant integrated across Word, Excel, and Outlook.

AI Score16.8 / 100

#716

Global Rank

30M+

Monthly Users

Higher Ranked

Writing & Chat

Google's multimodal AI assistant for text, images, code, and data analysis.

AI Score70.9 / 100

#167

Global Rank

350M+

Monthly Users

Deeply integrated across the full Microsoft 365 app suite, not a separate standalone tool
Grounds responses in a user’s actual organizational data via Microsoft Graph
Bundled SKUs simplify purchasing for smaller organizations

Add-on pricing means true total cost is two to three times the headline Copilot price once base licensing is included
Enterprise volume discounts expire June 30, 2026, a real deadline for larger buyers
Requires an existing Microsoft 365 subscription — not usable as a standalone product

Deeply integrated across Google’s broader ecosystem (Search, Workspace, Android)
Ultra tier pricing was reduced from its original $250/month, improving accessibility
API pricing offers genuinely low-cost options (Flash-Lite at $0.10/million tokens) for cost-sensitive applications

Full Workspace integration requires at least Business Standard ($14/user/month), not available on cheaper Workspace tiers
Credit-based system layered on top of tier usage limits adds complexity to understanding real usage capacity
Ultra tier’s $99.99-$199.99/month range represents significant cost for maximum usage limits and Deep Think access