RCube.org Competitors

Open-Xchange (OX) is a market leader of secure, open communication and office productivity software, email server software and DNS solutions, with hundreds of millions of users worldwide. As the leading independent email provider, we work with some of the world’s largest hosters, telcos and ISPs (including partners such as IONOS, KPN, Orange, Italiaonline, NTT, Softbank and TalkTalk), as well as public sector organizations. Our roots in open source have shaped our view of the world and culture – open, diverse, and with a bias to act, giving everyone at OX room to take responsibility within their team and grow. As a company, we believe in an internet that is open, safe and free, and create competitive products that allow our customers to deliver secure internet services with great user experience, and that respect privacy and generate value. With 230+ people worldwide, OX develops and operates open source software (aaS) for mail/messaging and collaboration/productivity. Dovecot is the world’s most popular IMAP server software, and PowerDNS provides secure DNS services to our customers and their users. Our business is fast-paced and changing constantly. We are always looking for people who share our vision, who want to make a difference, thrive in agile, non-hierarchical environments, and enjoy working in a high-tech environment as part of a truly international team. OX is headquartered in Cologne, Germany, with further offices in Hamburg, Nuremberg and Olpe), in addition to the USA (Palo Alto, CA, and New York, NY), Finland (Espoo), The Netherlands (The Hague), Italy (Turin), and Japan (Tokyo). If you're interested in joining OX, please visit: https://ox.io/careers

The Eclipse Foundation provides our global community of individuals and organizations with a mature, scalable, and business-friendly environment for open source software collaboration and innovation. The Foundation is home to the Eclipse IDE, Jakarta EE, Eclipse Software Defined Vehicle, and over 450 open source projects, including runtimes, tools, and frameworks for cloud and edge applications, IoT, AI, automotive, systems engineering, distributed ledger technologies, open processor designs, and many others. The Eclipse Foundation AISBL is an international non-profit association supported by over 350 members, including industry leaders who value open source as a key enabler for their business strategies. To learn more, follow us on social media at @EclipseFdn or visit eclipse.org.

Zimbra offers businesses a secure, data-sovereign email and collaboration platform built on open standards. A low-risk alternative, it provides integrated email, calendar, contacts, tasks, and document sharing. Businesses gain complete control over their data with flexible on-premises or cloud deployment options, ensuring compliance and avoiding vendor lock-in. Empowering productivity with advanced security, Zimbra delivers a trusted and transparent communication solution designed for your needs.