Criterion Google Gemini Microsoft Copilot
CategoryAI Chatbots & AssistantsAI Chatbots & Assistants
In one sentenceGoogle's AI assistant, bundled with Google One storage and Workspace apps on paid Google AI plans.Microsoft's AI assistant, free on its own and built into Word, Excel, PowerPoint and Outlook through Microsoft 365 plans.
Problem it solvesPuts an AI assistant inside the Google apps people already use, with options for image and video creation.Brings AI help into the Office apps people already use for documents, spreadsheets, slides and email.
Free planYesYes
Developer APIYes — docsNo
Open sourceNoNo
PlatformsWeb, Android, iOS, Gmail/Docs/Vids (paid)Web, Windows, iOS, Android, Microsoft 365 apps
Pricing (summary)Gemini is free with a Google Account. Google AI Plus is $4.99/month, AI Pro $19.99/month and AI Ultra starts at $99.99/month (with a $199.99 tier). Gemini Enterprise for businesses is $21 or $30 per seat per month.
Checked 2026-10-19
The Copilot app is free with limited usage. Microsoft 365 Personal ($9.99/month), Family ($12.99/month) and Premium ($19.99/month) add Copilot in Office apps. Businesses can buy bundles with Copilot or a Copilot Business add-on per user.
Checked 2026-10-19
Strengths
  • Strong free tier
  • Storage bundled with paid plans
  • Free API tier for Flash models
  • Deep Office integration
  • Bundles storage and Office apps
  • Business add-on priced per user
Limitations
  • Free plan uses the Flash-Lite model
  • Annual prices not shown on the subscriptions page
  • Some features limited to select countries
  • Models used per plan are not named on pricing pages
  • Family plan AI features are owner-only
  • No AI features in Microsoft 365 Basic