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, Rackspace 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, Arts & Entertainment, Internet & Telecom, Shopping and 242 other categories.

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

Geography

1 Microsoft Exchange Online is leading in most countries, including United States, United Kingdom, Canada, Australia and 216 other countries.

2 Rackspace Email hasn't got a lead over Microsoft Exchange Online in any country.