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Horde Groupware

PHP groupware suite with webmail and calendaring

Groupware Archived ★ 242 stars Hard setup GPL-2.0

This project is archived. Upstream development has stopped, so expect no new features or security fixes. Consider an actively maintained groupware alternative.

Horde Groupware is a collaboration suite built on the Horde framework that combines webmail, calendar, address book, tasks, and notes. It is a long-running PHP groupware project for teams.

Official siteSource code

Key features

  • Webmail with calendar
  • Shared address books
  • Tasks and notes
  • Modular Horde framework

Strengths

  • Released under the GPL-2.0 license
  • Written in PHP
  • Lightweight — runs in 512 MB RAM

Is Horde Groupware secure?

OSV.dev lists 20 published advisories for Horde Groupware. It doesn't publish GitHub releases we can match, so we can't say which of them apply to the current version. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

  • Most recent fixed advisory CVE-2025-41066, published 2025-12-02 (316 days ago)

Source: OSV.dev, checked 2026-10-14. How this is measured.

Horde Groupware replaces

Self-hosted Microsoft Exchange alternatives

Health badge

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SelfHostIndex: 9 · archived

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The score is recomputed on every nightly rebuild from public repository data — see how it is calculated.

Compare Horde Groupware

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