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	176,342	17.63
Microsoft Exchange Online	160,270	16.03
Office 365 Mail	148,413	14.84
Zoho Mail	17,034	1.7
Mimecast	14,613	1.46
Elastic Email	5,038	0.5
Exclaimer	3,805	0.38
Rackspace Email Hosting	3,551	0.36
Zimbra	2,649	0.26
Symantec.cloud	2,287	0.23
Namecheap Private Email	2,137	0.21
Titan Email	1,808	0.18
Dyn	1,662	0.17
TrendMicro Email Services	1,513	0.15
SpamExperts	1,384	0.14
Blackboard	791	0.08
Intermedia	538	0.05
Migadu	464	0.05
LINE WORKS	399	0.04
Yahoo! Business Email	350	0.03
Google Postini Services	349	0.03
easyDNS Mail	215	0.02
Sentia	189	0.02
Securence	188	0.02
FuseMail	188	0.02
Skymail	165	0.02
Everyone.net	146	0.01
Spam Hero	127	0.01
Kirim Email	122	0.01
Soverin	119	0.01
Network Solutions Email Hosting	109	0.01
Daou Office	94	0.01
MX-Relay	76	0.01
SpaceMail	66	0.01
Diligent	62	0.01
bexio	60	0.01
Pobox	59	0.01
BlueTie	52	0.01
Synaq	47	0
Blackberry Internet Service	42	0
SpamExperts OnlineSpamFilter	38	0
postale.io	34	0
Neo	29	0
Black Pearl Mail	27	0
Sprint Business	13	0
Pantera Tools	9	0
Permido	9	0
Apptix	7	0
Anti Spam Engine	5	0
Kerjamail	4	0
MailHappen	4	0
ISPrime	2	0
MailWish	2	0
MD OfficeMail	2	0
Agma Email	1	0