Open-Xchange is an open source web-based office productivity software suite.

Founded in 2005 by Rafael Laguna and Frank Hoberg, the software was released in December of the same year, and started as a Linux-based email and groupware program that was positioned as open-source alternative to Microsoft Exchange.

The software includes a set of applications for email, contacts, calendars, media and documents.

[3] In February 2014, file syncing and collaboration features have been added to the OX App Suite family.

[citation needed] In September 2014, the company introduced a tool called OX Guard to their existing open source email server.