<s>
Open-Xchange	B-Protocol
is	O
a	O
web-based	O
communication	O
,	O
collaboration	O
and	O
office	O
productivity	B-Application
software	I-Application
suite	O
,	O
which	O
enables	O
full	O
integration	O
of	O
email	O
,	O
documents	O
,	O
scheduling	O
and	O
social	O
media	O
.	O
</s>
<s>
Founded	O
in	O
2005	O
by	O
Rafael	O
Laguna	O
and	O
Frank	O
Hoberg	O
,	O
the	O
software	O
started	O
as	O
a	O
Linux-based	O
email	O
and	O
groupware	B-Application
solution	O
that	O
was	O
positioned	O
as	O
open-source	B-Application
alternative	O
to	O
Microsoft	B-Operating_System
Exchange	I-Operating_System
.	O
</s>
<s>
Andreas	O
Gauger	O
took	O
over	O
as	O
CEO	O
of	O
Open-Xchange	B-Protocol
in	O
May	O
2020	O
.	O
</s>
<s>
It	O
integrates	O
message	O
streams	O
from	O
Google	B-Application
Mail	I-Application
,	O
Hotmail	B-Operating_System
,	O
Facebook	B-Application
,	O
Twitter	B-Application
and	O
LinkedIn	B-Application
,	O
and	O
can	O
be	O
used	O
as	O
an	O
alternative	O
with	O
integrated	O
functionality	O
similar	O
to	O
Microsoft	B-Operating_System
Exchange	I-Operating_System
Server	I-Operating_System
and	O
Office	B-Operating_System
365	I-Operating_System
.	O
</s>
<s>
In	O
July	O
2015	O
PGP	B-Application
support	O
has	O
been	O
announced	O
for	O
OX	O
Guard	O
.	O
</s>
