Horde 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

Unlike multi-tenant SaaS-only Customer Identity and Access Management (CIAM) solutions that impose mocking and context switching on devs, FusionAuth is the only downloadable auth with a hybrid deployment model for diverse pipelines. Whether you want better user conversion into your app, your customers are requiring additional auth features like SSO and MFA, or auth needs to conform to broader transformation and security initiatives, with FusionAuth you get the performance and scalability of a single-tenant VIP suite. FusionAuth is a downloadable Customer Identity and Access Management (CIAM) solution for developers and engineering teams to add authentication features in their app within minutes; including login, registration, SSO, MFA, social login, authorization and much more.

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.