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Group-Office

Web-based groupware and CRM with email and calendar

Groupware ★ 282 stars Medium setup AGPL-3.0

Group-Office is a PHP-based groupware suite that bundles email, calendar, contacts, file sharing, and project management. The community edition is open source and self-hostable.

Official siteSource code

Key features

  • Email, calendar and contacts
  • ActiveSync and CalDAV support
  • Project and document management
  • Modular and extensible

Pros & cons

Strengths

  • Released under the AGPL-3.0 license
  • First-class Docker support for quick deployment
  • Written in PHP

Trade-offs

  • Some modules are commercial
  • Dated user interface

Is Group-Office secure?

No known vulnerabilities affect Group-Office's latest release (v26.0.53). OSV.dev lists 27 past advisories for the project; none of them applies to this release. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

  • Most recent fixed advisory CVE-2026-45551, published 2026-05-29 (138 days ago), fixed in 26.0.25, 6.8.165

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

Group-Office replaces

Self-hosted Microsoft 365 alternativesSelf-hosted Google Workspace alternatives

Health badge

Maintain Group-Office? Add its health score to your README. The badge links back to this page.

SelfHostIndex: 81 · excellent

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