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Group-Office

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Enterprise groupware and CRM with calendars, files and email

277 stars 57 forks last commit first released AGPL-3.0

Actively maintained

Last commit 26 Aug 2026.

Group-Office screenshot

Group-Office is a PHP-based enterprise groupware and CRM for teams. It provides integrated tools for contacts, calendars, email, file management and project tracking in a single web application.

Key Features

  • Web-based CRM with contact management, opportunities and email integration (IMAP)
  • Calendar and contact synchronization using CalDAV and CardDAV plus ActiveSync support for device sync
  • File manager with WebDAV support, search, sharing and (co-)editing workflows
  • Project and task management with time tracking, costs and project asset centralization
  • Extensible module system and "Studio" tools for custom fields and custom modules
  • Authentication and security features including two-factor authentication and encryption options
  • Deployable via Docker or traditional PHP/Composer stacks and available as hosted or self-hosted deployments

Use Cases

  • Centralize company CRM, shared calendars and email for small to medium businesses
  • Store and share project assets, track time and costs across client projects
  • Provide synchronized contacts and calendars to mobile and desktop devices via CalDAV/CardDAV/ActiveSync

Limitations and Considerations

  • Some advanced modules and hosted features are part of commercial offerings and may not be available in the community edition
  • Frontend build requires Node/npm and SASS tooling for development; production deployments rely on a PHP runtime and a supported relational database

Group-Office is suitable for organizations that want an integrated on-premises groupware and CRM suite with extensibility for custom workflows and modules. It balances collaboration, file management and customer-management features in a single platform.

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