Alternatives to Horde Groupware

A self-hosted open-source PHP suite with webmail, calendar, contacts, tasks and notes. The listings below can replace it for an important use case. Each note says what changes if you switch.

Replacements

Listings that take over the same core job as Horde Groupware.

  • SOGo

    An open-source groupware server with webmail, shared calendars and address books for organisations.

    FreeOpen sourceWebSelf-hosted

    SOGo is a self-hosted groupware server with webmail, shared calendars and contacts plus CalDAV, CardDAV and ActiveSync, but it needs existing mail and directory servers.

  • Roundcube

    A self-hosted, browser-based IMAP webmail client written in PHP.

    FreeOpen sourceWebSelf-hosted

    Roundcube is a self-hosted PHP webmail client for any IMAP server with LDAP address books and PGP support, but drops tasks, notes and time tracking.

  • Nextcloud Mail

    An IMAP webmail app that runs inside your own Nextcloud server.

    FreeOpen sourceWebSelf-hosted

    Nextcloud Mail runs IMAP webmail inside a Nextcloud server alongside its files, contacts and calendar, so it requires a working Nextcloud installation.

  • SnappyMail

    A lightweight self-hosted webmail client, forked from RainLoop and rebuilt for modern browsers.

    FreeOpen sourceWebSelf-hosted

    SnappyMail is a lightweight AGPL-3.0 webmail front end forked from RainLoop that loads fast on mobile, but offers mail only without the groupware suite.

  • Cypht

    Self-hosted open-source webmail that combines several email accounts and RSS feeds into one inbox.

    FreeOpen sourceWebSelf-hosted

    Cypht is self-hosted webmail that combines several accounts and RSS feeds in one inbox with IMAP, JMAP and EWS support, but lacks calendar and tasks.

Also worth comparing

These listings name Horde Groupware as their own alternative, so the relationship runs both ways.

  • Baïkal

    A lightweight self-hosted CalDAV and CardDAV server for syncing your own calendars and contacts.

    FreeOpen sourceSelf-hosted

    Horde Groupware is a fuller PHP groupware suite with webmail, tasks and notes alongside CalDAV and CardDAV sync, at the cost of an older codebase to maintain.

  • Radicale

    A small self-hosted CalDAV and CardDAV server for keeping calendars and contacts on your own machine.

    FreeOpen sourceSelf-hosted

    Horde Groupware is a self-hosted PHP suite with webmail, tasks and notes alongside CalDAV and CardDAV, requiring more server maintenance than a small sync server.

  • Zoho Workplace

    An online suite from Zoho combining mail, team chat, meetings, file storage and office editors.

    FreemiumProprietaryWeb

    Horde Groupware is a free self-hosted PHP suite with webmail, calendar, contacts, tasks and notes, requiring you to run and maintain a server.

Similar software

Related functionality, not a direct replacement.