<s>
Quill	B-Application
was	O
a	O
premium	O
business	O
communication	O
application	B-Application
that	O
was	O
officially	O
released	O
on	O
February	O
23	O
,	O
2021	O
,	O
having	O
previously	O
been	O
in	O
beta	O
.	O
</s>
<s>
Quill	B-Application
was	O
created	O
as	O
an	O
alternative	O
to	O
Slack	B-Protocol
and	O
was	O
available	O
on	O
MacOS	B-Application
,	O
Windows	B-Application
,	O
Linux	B-Application
,	O
Android	B-Application
,	O
iOS	B-Application
,	O
and	O
the	O
Web	O
.	O
</s>
<s>
The	O
company	O
received	O
$2	O
million	O
funding	O
from	O
venture-capitalist	O
Sam	O
Altman	O
and	O
General	O
Catalyst	O
,	O
and	O
also	O
received	O
$12.5	O
million	O
in	O
Series	O
A	O
funding	O
,	O
which	O
valued	O
Quill	B-Application
at	O
$62.5	O
million	O
,	O
led	O
by	O
Index	O
Ventures	O
partner	O
and	O
former	O
Slack	B-Protocol
board	O
observer	O
Sarah	O
Cannon	O
.	O
</s>
<s>
Quill	B-Application
was	O
headquartered	O
in	O
San	O
Francisco	O
,	O
California	O
.	O
</s>
<s>
Quill	B-Application
was	O
acquired	O
by	O
Twitter	B-Application
in	O
December	O
2021	O
and	O
the	O
service	O
was	O
shut	O
down	O
on	O
December	O
11	O
,	O
2021	O
.	O
</s>
