Open-Xchange
Olpe, DE · Founded 2005 · 197 employees on LinkedIn · 1 known investors
Find your way into Open-Xchange
Open-Xchange (OX) builds open-source email, collaboration, and DNS software for telcos, hosters, and service providers, enabling them to offer email and productivity services as alternatives to large hyperscalers. Its portfolio includes email/collaboration groupware, DNS software, and email server infrastructure used by hundreds of millions of end users.
Founders & leadership
Open-Xchange was founded in 2005 by Rafael Laguna, Frank Hoberg, and Martin Kauss.
RL

Rafael LagunainCo-founder
FH
Frank HoberginCo-founder
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Martin KaussinCo-founderCo-founder of Open-Xchange, Martin Kauss has built cloud-based email and collaboration software with expertise spanning mobile development (Android, iOS, web, and native), backend languages (Java, Python, JavaScript, PHP), and database systems including MySQL, PostgreSQL, Oracle, and NoSQL.
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Andreas GaugerinCEOAndreas Gauger co-founded 1&1 Internet AG, one of the world's largest web hosting companies, where he served as CEO from 1998 to 2008. He has since founded or invested in multiple ventures including ProfitBricks (sold to 1&1 in 2017), AndroidPIT, Finalfolder (sold to Acronis in 2016), and Chatflow, with expertise in internet products and M&A transactions.
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Dirk ValbertinHead of Finance, Legal and Corporate ServicesDirk Valbert is Head of Finance, Legal and Corporate Services at Open-Xchange, where he has held senior finance leadership roles for nearly three decades in the technology sector. His background includes leading an IPO in 2006, managing business model transitions from on-premises to SaaS, overseeing M&A activity, and implementing ERP and governance systems.
JF
Jacob FahrenkruginChief Technology OfficerJacob Fahrenkrug held engineering and technology leadership roles at Hypoport Group (technical lead for a mortgage marketplace in the Netherlands), Deutsche Post DHL (Chief Software Engineer overseeing a business unit's development), yetu (Chief Technology Officer developing smart home platform technologies), and Fyber (Director of Engineering managing ad monetization infrastructure).
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Errol VanderhorstinInterim Chief Commercial OfficerInterim Chief Commercial Officer at Open-Xchange. Vanderhorst has 19 years of experience in business development, product development, and operations within internet and cloud computing service providers, with expertise in sales, P&L management, and international business operations.
Investors · 1
In the news
Frequently asked questions
- What does Open-Xchange do?
- Open-Xchange (OX) builds open-source email, collaboration, and DNS software for telcos, hosters, and service providers, enabling them to offer email and productivity services as alternatives to large hyperscalers. Its portfolio includes email/collaboration groupware, DNS software, and email server infrastructure used by hundreds of millions of end users.
- Who founded Open-Xchange?
- Open-Xchange was founded by Rafael Laguna, Frank Hoberg, Martin Kauss in 2005.
- Who are Open-Xchange's investors?
- Open-Xchange's investors include Iris Capital.
- Where is Open-Xchange headquartered?
- Open-Xchange is headquartered in Olpe, DE.

