<s>
SpiderOak	B-Operating_System
is	O
a	O
US-based	O
collaboration	B-Protocol
tool	I-Protocol
,	O
online	B-General_Concept
backup	I-General_Concept
and	O
file	B-Application
hosting	I-Application
service	I-Application
that	O
allows	O
users	O
to	O
access	O
,	O
synchronize	O
and	O
share	O
data	O
using	O
a	O
cloud-based	B-Architecture
server	O
,	O
offered	O
by	O
a	O
company	O
of	O
the	O
same	O
name	O
.	O
</s>
<s>
Its	O
first	O
offering	O
,	O
its	O
online	B-General_Concept
backup	I-General_Concept
service	I-General_Concept
later	O
branded	O
"	O
SpiderOak	B-Operating_System
ONE	O
"	O
,	O
launched	O
in	O
December	O
2007	O
.	O
</s>
<s>
SpiderOak	B-Operating_System
is	O
accessible	O
through	O
an	O
app	O
for	O
Windows	B-Application
,	O
Mac	B-Device
and	O
Linux	B-Application
computer	B-Device
platforms	I-Device
,	O
and	O
Android	B-Application
,	O
N900	B-Application
Maemo	I-Application
and	O
iOS	B-Application
mobile	O
platforms	B-Device
.	O
</s>
<s>
According	O
to	O
SpiderOak	B-Operating_System
,	O
the	O
software	O
uses	O
encrypted	O
cloud	O
storage	O
and	O
client-side	B-Protocol
encryption	I-Protocol
key	O
creation	O
,	O
so	O
SpiderOak	B-Operating_System
employees	O
cannot	O
access	O
users	O
 '	O
information	O
.	O
</s>
<s>
SpiderOak	B-Operating_System
differentiates	O
itself	O
from	O
its	O
competition	O
by	O
this	O
kind	O
of	O
encryption	O
,	O
in	O
provision	O
for	O
syncing	O
files	O
and	O
folders	O
across	O
multiple	O
devices	O
,	O
and	O
in	O
automatic	O
de-duplication	B-General_Concept
of	O
data	O
.	O
</s>
<s>
Some	O
components	O
of	O
SpiderOak	B-Operating_System
are	O
open-source	B-Application
;	O
in	O
2009	O
,	O
the	O
company	O
announced	O
its	O
intent	O
for	O
the	O
SpiderOak	B-Operating_System
One	O
client	O
's	O
code	O
to	O
be	O
fully	O
open-source	B-Application
in	O
the	O
future	O
.	O
</s>
<s>
,	O
the	O
SpiderOak	B-Operating_System
One	O
client	O
's	O
source	O
code	O
is	O
only	O
available	O
open-source	B-Application
for	O
mobile	O
platforms	B-Device
,	O
with	O
no	O
current	O
plans	O
to	O
make	O
the	O
desktop	O
client	O
's	O
code	O
open-source	B-Application
.	O
</s>
<s>
SpiderOak	B-Operating_System
used	O
to	O
provide	O
an	O
open-source	B-Application
password	O
manager	O
named	O
Encryptr	O
,	O
which	O
was	O
discontinued	O
in	O
March	O
2021	O
.	O
</s>
<s>
The	O
source	O
code	O
for	O
SpiderOak	B-Operating_System
's	O
group	O
messaging	O
application	O
Semaphor	O
is	O
published	O
to	O
allow	O
auditing	O
.	O
</s>
<s>
SpiderOak	B-Operating_System
was	O
founded	O
in	O
2007	O
by	O
Ethan	O
Oberman	O
and	O
Alan	O
Fairless	O
as	O
an	O
encrypted	O
private	O
backup	O
program	O
.	O
</s>
<s>
In	O
2013	O
,	O
SpiderOak	B-Operating_System
began	O
developing	O
the	O
Crypton	B-Language
framework	I-Language
,	O
"	O
a	O
JavaScript	O
framework	O
for	O
building	O
applications	O
where	O
the	O
server	O
does	O
n't	O
know	O
the	O
contents	O
it	O
's	O
storing	O
on	O
behalf	O
of	O
users.	O
"	O
</s>
<s>
Crypton	B-Language
is	O
an	O
open-source	B-Application
project	O
allowing	O
developers	O
to	O
easily	O
add	O
encryption	O
security	O
to	O
mobile	O
applications	O
.	O
</s>
<s>
By	O
mid-2014	O
,	O
according	O
to	O
Oberman	O
,	O
SpiderOak	B-Operating_System
had	O
near	O
1	O
million	O
users	O
.	O
</s>
<s>
As	O
of	O
2014	O
,	O
SpiderOak	B-Operating_System
was	O
headquartered	O
in	O
Chicago	O
and	O
employed	O
42	O
staff	O
,	O
headed	O
by	O
CEO	O
Alan	O
Fairless	O
.	O
</s>
<s>
In	O
2015	O
,	O
SpiderOak	B-Operating_System
raised	O
$3.5	O
million	O
in	O
Series	O
A	O
funding	O
,	O
bringing	O
its	O
total	O
funding	O
to	O
around	O
$9	O
million	O
.	O
</s>
<s>
In	O
February	O
2017	O
,	O
SpiderOak	B-Operating_System
discontinued	O
using	O
the	O
phrase	O
"	O
zero	O
knowledge	O
"	O
to	O
describe	O
their	O
service	O
following	O
public	O
criticism	O
that	O
the	O
phrase	O
conflicted	O
with	O
the	O
mechanism	O
behind	O
cryptographic	B-Protocol
zero-knowledge	I-Protocol
proofs	I-Protocol
.	O
</s>
<s>
SpiderOak	B-Operating_System
adopted	O
the	O
phrase	O
"	O
no	O
knowledge	O
"	O
for	O
their	O
marketing	O
.	O
</s>
<s>
On	O
August	O
1	O
,	O
2018	O
,	O
the	O
warrant	O
canary	O
on	O
SpiderOak	B-Operating_System
's	O
website	O
briefly	O
vanished	O
,	O
followed	O
by	O
some	O
system	O
downtime	O
.	O
</s>
<s>
Five	O
days	O
later	O
,	O
the	O
canary	O
was	O
re-signed	O
using	O
GPG	B-Application
encryption	I-Application
.	O
</s>
<s>
By	O
August	O
9	O
,	O
Spideroak	B-Operating_System
had	O
also	O
updated	O
their	O
transparency	O
report	O
,	O
making	O
a	O
statement	O
concerning	O
the	O
canary	O
.	O
</s>
