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	173,420	17.34
Microsoft Exchange Online	158,583	15.86
Office 365 Mail	146,763	14.68
Zoho Mail	16,827	1.68
Mimecast	14,426	1.44
Elastic Email	4,967	0.5
Exclaimer	3,799	0.38
Rackspace Email Hosting	3,421	0.34
Zimbra	2,531	0.25
Symantec.cloud	2,191	0.22
Namecheap Private Email	2,051	0.21
Titan Email	1,675	0.17
Dyn	1,636	0.16
TrendMicro Email Services	1,501	0.15
SpamExperts	1,314	0.13
Blackboard	790	0.08
Intermedia	515	0.05
Migadu	459	0.05
LINE WORKS	403	0.04
Yahoo! Business Email	339	0.03
Google Postini Services	324	0.03
easyDNS Mail	208	0.02
Securence	189	0.02
FuseMail	179	0.02
Skymail	161	0.02
Everyone.net	140	0.01
Spam Hero	124	0.01
Soverin	122	0.01
Kirim Email	122	0.01
Network Solutions Email Hosting	104	0.01
Daou Office	94	0.01
MX-Relay	74	0.01
Sentia	73	0.01
SpaceMail	69	0.01
Diligent	62	0.01
bexio	60	0.01
Pobox	58	0.01
BlueTie	52	0.01
Synaq	42	0
Blackberry Internet Service	39	0
SpamExperts OnlineSpamFilter	37	0
postale.io	35	0
Neo	29	0
Black Pearl Mail	27	0
Sprint Business	13	0
Pantera Tools	9	0
Permido	9	0
Apptix	6	0
Anti Spam Engine	5	0
Kerjamail	4	0
MailHappen	4	0
ISPrime	2	0
MD OfficeMail	2	0
Agma Email	1	0
MailWish	1	0