Open-Xchange, which makes open source groupware, is quietly gaining momentum with European managed service providers and solutions providers that are moving into the hosting market.

I am not suggesting the hosted Microsoft Exchange empire will collapse in Europe (or elsewhere). But MSPs seeking to differentiate in the market now have numerous open source options from which to choose — including Open-Xchange. Here’s a quick look at the four MSPs that have taken the Open-Xchange plunge.

According to an Open-Xchange press release, recent adopters include:

The move to hosted Open-Xchange is occurring across the world. Other adopters, according to Open-Xchange, include Network Solutions (U.S.), 1&1 Internet (Germany), JMF (Japan), OVH (France) and Hostpoint (Switzerland).

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