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	160,047	16
Microsoft Exchange Online	142,844	14.28
Office 365 Mail	133,454	13.35
Mimecast	13,608	1.36
Zoho Mail	13,085	1.31
Elastic Email	4,480	0.45
Rackspace Email Hosting	3,281	0.33
Zimbra	2,755	0.28
Symantec.cloud	2,265	0.23
Namecheap Private Email	1,676	0.17
Dyn	1,577	0.16
TrendMicro Email Services	1,480	0.15
Exclaimer	1,441	0.14
SpamExperts	1,206	0.12
Blackboard	750	0.08
Intermedia	503	0.05
Migadu	400	0.04
LINE WORKS	399	0.04
Yahoo! Business Email	321	0.03
Google Postini Services	309	0.03
easyDNS Mail	227	0.02
Securence	186	0.02
FuseMail	183	0.02
Everyone.net	120	0.01
Network Solutions Email Hosting	110	0.01
Spam Hero	102	0.01
Sentia	100	0.01
MX-Relay	77	0.01
bexio	66	0.01
Diligent	56	0.01
Synaq	54	0.01
BlueTie	54	0.01
Pobox	50	0
Blackberry Internet Service	45	0
ISPrime	37	0
Black Pearl Mail	31	0
Soverin	18	0
Sprint Business	15	0
Pantera Tools	9	0
Permido	8	0
Apptix	7	0
Anti Spam Engine	5	0
Kerjamail	4	0
MailHappen	3	0
MD OfficeMail	2	0
MailWish	1	0