--- title: Kolab Systems AG Reviews meta\_title: 'Kolab Systems AG Reviews 2026: Details, Pricing, & Features | G2' meta\_description: Filter reviews by the users' company size, role or industry to find out how Kolab Systems AG works for a business like yours. date\_modified: '2026-07-31' parent\_category: name: Ecosystem Service Providers url: https://www.g2.com/categories/ecosystem-service-providers --- # Kolab Systems AG Reviews & Provider Details Kolab Systems AG offers Kolab, a comprehensive, open-source groupware solution designed to enhance collaboration and communication within organizations. Kolab integrates email, calendaring, contact management, task tracking, and file sharing into a unified platform, ensuring seamless interaction across various devices and operating systems. Emphasizing security and privacy, Kolab provides a self-hosted environment that grants organizations full control over their data, free from vendor lock-in and third-party access. Key Features and Functionality: - Email Hosting: Secure and reliable email services supporting IMAP and POP3 protocols, with end-to-end encryption capabilities. - Calendaring and Scheduling: Integrated calendar system with support for CalDAV, enabling efficient scheduling and resource management. - Contact Management: Comprehensive address book with CardDAV support, facilitating easy sharing and synchronization of contacts. - Task Management: Tools for creating, assigning, and tracking tasks, enhancing team productivity. - File Sharing and Collaboration: Cloud storage solutions that allow for document sharing and collaborative editing, integrated with office suites like Collabora Online. - Multi-Client Support: Compatibility with various clients, including KDE Kontact, Roundcube web interface, Mozilla Thunderbird, and Microsoft Outlook via proprietary connectors. - Mobile Device Synchronization: Support for ActiveSync, CalDAV, and CardDAV protocols, ensuring synchronization across mobile devices. - Web Administration Interface: User-friendly web-based interface for system administration and configuration. - Security and Privacy: Strong emphasis on data security with features like end-to-end encryption and adherence to strict privacy laws, particularly beneficial for organizations concerned about data sovereignty. Primary Value and Problem Solved: Kolab addresses the critical need for a secure, flexible, and open-source groupware solution that empowers organizations to maintain full control over their communication and collaboration infrastructure. By offering a self-hosted platform, Kolab eliminates concerns related to vendor lock-in and third-party data access, ensuring that sensitive information remains within the organization's control. Its compatibility with various clients and devices, coupled with robust security features, makes Kolab an ideal choice for organizations seeking a reliable and private collaboration suite. * * * Seller [Kolab Systems AG](https://www.g2.com/sellers/kolab-systems-ag) Discussions [Kolab Systems AG Community](https://www.g2.com/products/kolab-systems-ag/discuss) Show More ## Top-Rated Alternatives [ ![Accenture](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Accenture") Accenture 4.2/5(107) ](https://www.g2.com/products/accenture/reviews) [ ![Deloitte Consulting](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Deloitte Consulting") Deloitte Consulting 4.2/5(66) ](https://www.g2.com/products/deloitte-consulting/reviews) [ ![IBM Consulting](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "IBM Consulting") IBM Consulting 4/5(65) ](https://www.g2.com/products/ibm-consulting/reviews) [ View All Alternatives ](https://www.g2.com/products/kolab-systems-ag/competitors/alternatives) ## Kolab Systems AG hasn't been reviewed yet Used Kolab Systems AG? 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