💡 Pick it for a mature Zimbra-style groupware platform with a larger administrator ecosystem.
Zimbra is an enterprise-class email, calendar, and collaboration solution built for the cloud, both public and private.
Starting at $6 per mailbox per year
Best Zextras Carbonio Community Edition Alternatives ranked by AI · updated Aug 2026
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Carbonio is a self-hosted collaboration suite for organizations needing email, calendars, contacts, file sharing, and conferencing. Its Community Edition provides an open-source deployment option with broad groupware functionality and Linux-based administration.
Developer: Zextras
Price: Free Community Edition; paid editions available
🎯 zextras.com/carbonio-community-edition
Top 6 Zextras Carbonio Community Edition alternatives
💡 Pick it when file collaboration and extensibility matter more than an all-in-one mail-server stack.
Nextcloud Hub is a suite of client-server software for creating and using file hosting services. It is functionally similar to Dropbox, Office...
Free, with paid enterprise options
💡 Pick it for standards-based open-source groupware layered onto an existing mail infrastructure.
SOGo is a fully-featured collaboration suite with focus on scalability and simplicity.
Free and paid versions available
💡 Pick it when reliable self-hosted email is the priority and you need less groupware breadth.
mailcow is a modern mail server suite based on Dovecot, Postfix, SOGo, and other open-source software. It provides a complete email solution...
💡 Pick it for a supported, commercial all-in-one mail and groupware server with a small free tier.
Axigen is a mail server software that offers secure and reliable email communication for businesses of all sizes. It provides features such...
Starting from $95 per year
💡 Pick it when you want vendor-supported email and collaboration with less infrastructure management.
IceWarp is a comprehensive email collaboration platform that offers email, messaging, and collaboration solutions for businesses of all sizes.
Varies based on the number of users and features selected
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