<s>
SendGrid	B-Application
(	O
also	O
known	O
as	O
Twilio	B-Application
SendGrid	I-Application
)	O
is	O
a	O
Denver	O
,	O
Colorado-based	O
customer	O
communication	O
platform	O
for	O
transactional	O
and	O
marketing	O
email	O
.	O
</s>
<s>
As	O
of	O
2017	O
,	O
SendGrid	B-Application
has	O
raised	O
over	O
$81	O
million	O
and	O
has	O
offices	O
in	O
Denver	O
,	O
Colorado	O
;	O
Boulder	O
,	O
Colorado	O
;	O
Irvine	O
,	O
California	O
;	O
Redwood	O
City	O
,	O
California	O
;	O
and	O
London	O
.	O
</s>
<s>
Twilio	B-General_Concept
acquired	O
SendGrid	B-Application
in	O
February	O
2019	O
.	O
</s>
<s>
SendGrid	B-Application
provides	O
a	O
cloud-based	B-Architecture
service	O
that	O
assists	O
businesses	O
with	O
email	O
delivery	O
.	O
</s>
<s>
It	O
also	O
handles	O
Internet	O
service	O
provider	O
(	O
ISP	O
)	O
monitoring	O
,	O
domain	B-Protocol
keys	I-Protocol
,	O
sender	B-Protocol
policy	I-Protocol
framework	I-Protocol
(	O
SPF	O
)	O
,	O
and	O
feedback	O
loops	O
.	O
</s>
<s>
Beginning	O
in	O
2012	O
,	O
the	O
company	O
integrated	O
SMS	B-Device
,	O
voice	O
,	O
and	O
push	B-General_Concept
notification	I-General_Concept
abilities	O
to	O
its	O
service	O
through	O
a	O
partnership	O
with	O
Twilio	B-General_Concept
.	O
</s>
<s>
SendGrid	B-Application
offers	O
a	O
freemium	O
version	O
and	O
a	O
Lite	O
Plan	O
(	O
pay-as-you-go	O
)	O
,	O
as	O
well	O
as	O
three	O
expanded	O
levels	O
of	O
service	O
:	O
Essentials	O
,	O
Pro	O
,	O
and	O
Premier	O
.	O
</s>
<s>
SendGrid	B-Application
's	O
clients	O
include	O
Uber	B-Application
,	O
Twilio	B-General_Concept
,	O
Foursquare	B-Application
,	O
Pandora	B-Application
,	O
and	O
Airbnb	O
.	O
</s>
<s>
Before	O
SendGrid	B-Application
was	O
called	O
Twilio	B-Application
SendGrid	I-Application
,	O
they	O
named	O
the	O
project	O
smtpapi.com	O
.	O
</s>
<s>
After	O
founding	O
SendGrid	B-Application
in	O
Riverside	O
,	O
California	O
,	O
in	O
July	O
2009	O
,	O
Saldana	O
,	O
Lopez	O
,	O
and	O
Jenkins	O
enrolled	O
the	O
startup	O
in	O
the	O
TechStars	O
accelerator	O
program	O
and	O
moved	O
the	O
company	O
to	O
Boulder	O
,	O
Colorado	O
.	O
</s>
<s>
In	O
April	O
2010	O
,	O
the	O
email	O
software-as-a-service	B-Architecture
(	O
SaaS	B-Architecture
)	O
company	O
received	O
$5	O
million	O
in	O
Series	O
A	O
round	O
funding	O
from	O
Foundry	O
Group	O
,	O
SoftTech	O
VC	O
,	O
and	O
Highway	O
12	O
Ventures	O
,	O
as	O
well	O
as	O
individual	O
investors	O
including	O
David	O
Cohen	O
,	O
Scott	O
Petry	O
,	O
Dave	O
McClure	O
,	O
and	O
Matt	O
Mullenweg	O
.	O
</s>
<s>
Ryan	O
McIntyre	O
,	O
the	O
co-founder	O
of	O
Foundry	O
,	O
joined	O
SendGrid	B-Application
's	O
board	O
of	O
directors	O
at	O
this	O
time	O
as	O
well	O
.	O
</s>
<s>
In	O
January	O
2012	O
,	O
SendGrid	B-Application
raised	O
$21	O
million	O
in	O
Series	O
B	O
funding	O
.	O
</s>
<s>
The	O
funding	O
round	O
–	O
led	O
by	O
Bessemer	O
Venture	O
Partners	O
and	O
previous	O
investors	O
Highway	O
12	O
Ventures	O
,	O
Foundry	O
Group	O
,	O
500	O
Startups	O
,	O
and	O
TechStars	O
–	O
occurred	O
concurrently	O
with	O
a	O
new	O
partnership	O
between	O
SendGrid	B-Application
and	O
Microsoft	O
’s	O
Windows	B-Application
Azure	I-Application
platform	O
.	O
</s>
<s>
In	O
December	O
2014	O
,	O
SendGrid	B-Application
raised	O
$20	O
million	O
in	O
Series	O
C	O
funding	O
.	O
</s>
<s>
In	O
November	O
2016	O
,	O
SendGrid	B-Application
raised	O
$33	O
million	O
in	O
Series	O
D	O
funding	O
.	O
</s>
<s>
In	O
the	O
same	O
month	O
,	O
SendGrid	B-Application
announced	O
a	O
partnership	O
with	O
web	O
host	O
service	O
Rackspace	O
Hosting	O
that	O
allows	O
Rackspace	O
users	O
to	O
launch	O
email	O
campaigns	O
using	O
SendGrid	B-Application
's	O
software	O
.	O
</s>
<s>
SendGrid	B-Application
announced	O
in	O
June	O
2012	O
that	O
it	O
was	O
working	O
with	O
60,000	O
businesses	O
and	O
had	O
sent	O
out	O
45	O
billion	O
emails	O
since	O
its	O
start	O
in	O
2009	O
.	O
</s>
<s>
On	O
July	O
25	O
,	O
2012	O
,	O
the	O
company	O
reported	O
it	O
had	O
partnered	O
with	O
platform-as-a-service	B-Application
(	O
PaaS	B-Application
)	O
companies	O
CloudBees	B-General_Concept
,	O
Heroku	B-General_Concept
,	O
and	O
Engine	O
Yard	O
.	O
</s>
<s>
In	O
December	O
2012	O
,	O
SendGrid	B-Application
partnered	O
with	O
Twilio	B-General_Concept
to	O
incorporate	O
SMS	B-Device
and	O
push	B-General_Concept
notification	I-General_Concept
services	I-General_Concept
to	O
its	O
platform	O
.	O
</s>
<s>
The	O
company	O
announced	O
integrations	O
with	O
Parse	O
,	O
Windows	B-Application
Azure	I-Application
,	O
and	O
StackMob	O
the	O
same	O
month	O
.	O
</s>
<s>
In	O
April	O
2013	O
,	O
SendGrid	B-Application
announced	O
it	O
had	O
sent	O
over	O
100	O
billion	O
emails	O
.	O
</s>
<s>
Former	O
Citrix	O
executive	O
Sameer	O
Dholakia	O
joined	O
SendGrid	B-Application
as	O
the	O
CEO	B-Application
in	O
September	O
2014	O
.	O
</s>
<s>
In	O
October	O
2017	O
,	O
SendGrid	B-Application
was	O
ranked	O
#13	O
in	O
Fortune	O
's	O
list	O
of	O
The	O
50	O
Best	O
Workplaces	O
in	O
Southern	O
California	O
.	O
</s>
<s>
In	O
December	O
2017	O
,	O
SendGrid	B-Application
announced	O
that	O
they	O
are	O
processing	O
around	O
36	O
billion	O
monthly	O
emails	O
.	O
</s>
<s>
In	O
October	O
2018	O
,	O
Twilio	B-General_Concept
announced	O
plans	O
to	O
acquire	O
SendGrid	B-Application
for	O
$2	O
billion	O
.	O
</s>
<s>
In	O
December	O
2018	O
,	O
a	O
SendGrid	B-Application
shareholder	O
filed	O
a	O
lawsuit	O
in	O
Colorado	O
federal	O
court	O
in	O
response	O
to	O
the	O
planned	O
acquisition	O
.	O
</s>
<s>
Twilio	B-General_Concept
completed	O
its	O
acquisition	O
of	O
SendGrid	B-Application
on	O
February	O
1	O
,	O
2019	O
.	O
</s>
