Business Email Hosting Usage Distribution in the Top 1 Million Sites

Statistics for websites using Business Email Hosting providers

Technology	Websites	%
Google Apps for Business	158,848	15.88
Microsoft Exchange Online	132,961	13.3
Office 365 Mail	123,700	12.37
Mimecast	13,003	1.3
Zoho Mail	12,097	1.21
Elastic Email	4,340	0.43
Rackspace Email Hosting	3,819	0.38
Symantec.cloud	2,690	0.27
Zimbra	2,121	0.21
Dyn	1,814	0.18
Namecheap Private Email	1,682	0.17
Exclaimer	1,435	0.14
SpamExperts	1,275	0.13
TrendMicro Email Services	1,262	0.13
Blackboard	832	0.08
Intermedia	573	0.06
Yahoo! Business Email	446	0.04
Migadu	374	0.04
LINE WORKS	374	0.04
Google Postini Services	330	0.03
easyDNS Mail	253	0.03
FuseMail	222	0.02
Securence	200	0.02
Network Solutions Email Hosting	169	0.02
Sentia	146	0.01
Everyone.net	139	0.01
Spam Hero	127	0.01
MX-Relay	79	0.01
BlueTie	59	0.01
Pobox	59	0.01
Diligent	56	0.01
ISPrime	53	0.01
Blackberry Internet Service	52	0.01
Synaq	49	0
bexio	49	0
Black Pearl Mail	29	0
Sprint Business	19	0
Apptix	11	0
Soverin	10	0
Anti Spam Engine	7	0
Kerjamail	5	0
Pantera Tools	5	0
Permido	5	0
MD OfficeMail	2	0
MailHappen	1	0