Market Share by Top Websites

1 Microsoft Exchange Online is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, Yahoo Business Email is clearly lagging behind, losing to Microsoft Exchange Online in all segments.

Websites Categories

1 Microsoft Exchange Online has better usage coverage in more websites categories. Including Business & Industry, Internet & Telecom, Arts & Entertainment, Shopping and 239 other categories.

2 Yahoo Business Email hasn't got a lead over Microsoft Exchange Online in any websites category.


1 Microsoft Exchange Online is leading in most countries, including United States, United Kingdom, Brazil, Turkey and 203 other countries.

2 Yahoo Business Email is leading in Russia, Ukraine, Belarus, Kazakhstan and 7 other countries.