How many companies use Microsoft 365 vs Outlook Web App?

4,321,946 companies use Microsoft 365 and 281 companies use Outlook Web App in our database. Microsoft 365 is more widely adopted with 15380.6x more companies than Outlook Web App.

Can I get a list of companies using both Microsoft 365 and Outlook Web App?

Yes. AgentData tracks companies using both tools. Sign up free to access the full list with emails, tech stacks, and contacts via CSV or API.

Microsoft 365 vs Outlook Web App

Microsoft 365 is used by 4,321,946companies — 15380.6x more than Outlook Web App (281).

4,321,946 use Microsoft 365281 use Outlook Web App

Side-by-side comparison

	Microsoft 365	Outlook Web App
Companies	4,321,946	281
Category	Webmail	Webmail

Company adoption

Top companies using Outlook Web App

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