<s>
QuantConnect	B-Application
is	O
an	O
open-source	B-License
,	O
cloud-based	O
algorithmic	O
trading	O
platform	O
for	O
equities	O
,	O
</s>
<s>
QuantConnect	B-Application
serves	O
over	O
100,000	O
quants	O
from	O
170+	O
countries	O
,	O
with	O
customers	O
including	O
hedge	O
funds	O
and	O
brokerages	O
,	O
as	O
well	O
as	O
individuals	O
such	O
as	O
engineers	O
,	O
mathematicians	O
,	O
scientists	O
,	O
quants	O
,	O
students	O
,	O
traders	O
,	O
and	O
programmers	O
.	O
</s>
<s>
Jared	O
Broad	O
founded	O
QuantConnect	B-Application
in	O
2011	O
.	O
</s>
<s>
QuantConnect	B-Application
became	O
incorporated	O
in	O
2013	O
,	O
and	O
became	O
open-sourced	O
in	O
2015	O
.	O
</s>
<s>
QuantConnect	B-Application
has	O
seen	O
substantial	O
user	O
growth	O
in	O
recent	O
years	O
,	O
going	O
from	O
45,000	O
users	O
in	O
December	O
2017	O
,	O
to	O
55,000	O
users	O
in	O
May	O
2018	O
,	O
then	O
to	O
over	O
65,000	O
users	O
in	O
October	O
2018	O
.	O
</s>
<s>
QuantConnect	B-Application
added	O
cryptocurrency	O
support	O
in	O
October	O
2017	O
,	O
integrating	O
with	O
Coinbase	O
’s	O
GDAX	O
exchange	O
.	O
</s>
<s>
QuantConnect	B-Application
provides	O
market	O
data	O
and	O
a	O
cluster	B-Architecture
computer	I-Architecture
directly	O
to	O
engineers	O
around	O
the	O
world	O
,	O
backtesting	O
and	O
building	O
quantitative	O
trading	O
strategies	O
across	O
multiple	O
markets	O
,	O
including	O
equities	O
,	O
futures	O
,	O
options	O
,	O
cryptocurrencies	O
,	O
CFDs	O
and	O
FX	O
.	O
</s>
<s>
Once	O
the	O
team	O
greenlights	O
a	O
user-generated	O
algorithm	O
,	O
it	O
is	O
loaded	O
into	O
QuantConnect	B-Application
's	O
Alpha	O
Streams	O
API	O
and	O
priced	O
accordingly	O
by	O
the	O
quant	O
who	O
developed	O
it	O
.	O
</s>
<s>
According	O
to	O
Broad	O
,	O
about	O
5%	O
of	O
users	O
consider	O
their	O
work	O
with	O
QuantConnect	B-Application
to	O
be	O
full-time	O
.	O
</s>
<s>
QuantConnect	B-Application
launched	O
its	O
Alpha	O
Streams	O
project	O
in	O
December	O
2017	O
.	O
</s>
<s>
QuantConnect	B-Application
supports	O
coding	O
in	O
Python	B-Language
and	O
C#	B-Application
,	O
but	O
also	O
supports	O
other	O
languages	O
through	O
its	O
open-source	B-License
project	O
,	O
the	O
Lean	O
Algorithmic	O
Trading	O
Engine	O
(	O
LEAN	O
)	O
.	O
</s>
<s>
LEAN	O
is	O
an	O
open-source	B-License
algorithmic	O
trading	O
engine	O
that	O
allows	O
users	O
to	O
do	O
the	O
same	O
algorithm	O
design	O
,	O
backtesting	O
,	O
and	O
trading	O
that	O
they	O
can	O
do	O
on	O
the	O
website	O
.	O
</s>
<s>
Founded	O
in	O
2011	O
,	O
Quantopian	O
was	O
an	O
early	O
leader	O
in	O
the	O
space	O
and	O
a	O
key	O
competitor	O
of	O
QuantConnect	B-Application
.	O
</s>
<s>
Platforms	O
like	O
QuantConnect	B-Application
and	O
CrunchDAO	O
capitalized	O
on	O
Quantopian	O
's	O
shut-down	O
in	O
2020	O
,	O
with	O
an	O
industry	O
journalist	O
commenting	O
in	O
November	O
2020	O
,	O
"	O
QuantConnect	B-Application
has	O
115,000	O
users	O
and	O
some	O
of	O
its	O
strategies	O
are	O
being	O
licensed	O
with	O
funds	O
that	O
have	O
$65bn	O
in	O
aggregate	O
AUM	O
"	O
.	O
</s>
<s>
The	O
quant	O
community	O
also	O
relies	O
on	O
a	O
number	O
of	O
open	B-License
source	I-License
projects	O
like	O
and	O
to	O
test	O
and	O
execute	O
strategies	O
.	O
</s>
<s>
Additionally	O
,	O
a	O
group	O
of	O
tools	O
has	O
emerged	O
to	O
service	O
the	O
needs	O
of	O
quants	O
that	O
expands	O
on	O
QuantConnect	B-Application
's	O
entry	O
into	O
cryptocurrencies	O
including	O
,	O
and	O
.	O
</s>
