Open Source Collaboration Software Maker Open-Xchange Secures $9 Million

Open-Xchange has closed a Series B round of venture funding to the tune of $9 million. The round was led by German venture firm eCAPITAL Entrepreneurial Partners AG and joined by BayBG and existing Munich-based investor BayTech Venture Capital (if you’re looking for a connection: the company has R&D operations in the country). Open-Xchange had raised a total of $8.8 million in a Series A financing round from angel investors and BayTech back in 2006.

Built as open source software, Open-Xchange aims to provide an alternative to commercial platforms like Microsoft Exchange and SharePoint, including features like mobility support (iPhones, Blackberry), document sharing, shared calendars and shared address books.

The Tarrytown, NY-based company claims it has managed to increase the number of paid mailboxes by 4 year over year, bringing its total to 8.4 million as a result of deals with leading hosting providers in the US (Network Solutions) and Europe (1&1, OVH, Hostpoint).