# Best self-hosted Groupware & Calendars apps

> Shared calendars, contacts and collaboration suites. Sync schedules and address books across devices with CalDAV and CardDAV servers you run. The most popular self-hosted groupware & calendars apps on GitHub are Nextcloud, Seafile and Colanode. appsgit lists 20 self-hosted apps in this category, ranked by GitHub stars. All 20 apps here are open source.

## Key facts

| Fact | Value |
|---|---|
| Apps listed | 20 |
| Most starred | Nextcloud (37,003 stars) |
| With a Docker image | 7 |
| Canonical URL | https://appsgit.com/categories/groupware-calendars |

## All 20 Groupware & Calendars apps

- [Nextcloud](https://appsgit.com/apps/nextcloud): Access and share your files, calendars, contacts, mail and more from any device, on your terms. (37,003 stars, AGPL-3.0, PHP)
- [Seafile](https://appsgit.com/apps/seafile): File hosting and sharing solution primary for teams and organizations. (15,307 stars, GPL-2.0, C)
- [Colanode](https://appsgit.com/apps/colanode): Collaboration suite with real-time messaging, rich text pages, file management, and dynamic databases - built for offline work (alternative to Slack, Notion). (5,158 stars, Apache-2.0, TypeScript, Docker)
- [Radicale](https://appsgit.com/apps/radicale): Simple calendar and contact server with extremely low administrative overhead. (5,087 stars, GPL-3.0, Python)
- [Baïkal](https://appsgit.com/apps/baikal): Lightweight CalDAV and CardDAV server based on sabre/dav. (3,328 stars, GPL-3.0, PHP)
- [SOGo](https://appsgit.com/apps/sogo): SOGo offers multiple ways to access the calendaring and messaging data. CalDAV, CardDAV, GroupDAV, as well as ActiveSync, including native Outlook compatibility and Web interface. (2,171 stars, GPL-2.0, Objective-C)
- [Sync-in](https://appsgit.com/apps/sync-in): File storage, syncing, sharing, and collaboration with real-time editing, permission management, and desktop/CLI clients. (1,789 stars, AGPL-3.0, TypeScript, Docker)
- [SabreDAV](https://appsgit.com/apps/sabredav): Open source CardDAV, CalDAV, and WebDAV framework and server. (1,725 stars, BSD-3-Clause, PHP)
- [Keeper.sh](https://appsgit.com/apps/keeper-sh): Calendar syncing tool that pulls and pushes events between calendar sources and destinations via iCal/ICS or OAuth, with support for anonymized busy/free events. (1,376 stars, AGPL-3.0, TypeScript, Docker)
- [bewCloud](https://appsgit.com/apps/bewcloud): File sharing + sync, notes, and photos (alternative to Nextcloud and ownCloud's RSS reader). (1,238 stars, AGPL-3.0, JavaScript, Docker)
- [DavMail](https://appsgit.com/apps/davmail): POP/IMAP/SMTP/Caldav/Carddav/LDAP exchange gateway allowing users to use any mail/calendar client with an Exchange server, even from the internet or behind a firewall through Outlook Web Access. (765 stars, GPL-2.0, Java)
- [Davis](https://appsgit.com/apps/davis): A simple, dockerizable and fully translatable admin interface for sabre/dav based on Symfony 5 and Bootstrap 4, largely inspired by Baïkal. (757 stars, MIT, PHP)
- [Openmeetings](https://appsgit.com/apps/openmeetings): Video conferencing, instant messaging, whiteboard, collaborative document editing and other groupware tools using API functions of the Red5 Streaming Server for Remoting and Streaming. (685 stars, Apache-2.0, Java)
- [Manage My Damn Life](https://appsgit.com/apps/manage-my-damn-life): Manage my Damn Life (MMDL) is a self-hosted front end for managing your CalDAV tasks and calendars. (642 stars, GPL-3.0, JavaScript, Docker)
- [Xandikos](https://appsgit.com/apps/xandikos): Open source CardDAV and CalDAV server with minimal administrative overhead, backed by a Git repository. (607 stars, GPL-3.0, Python)
- [egroupware](https://appsgit.com/apps/egroupware): Software suite including calendars, address books, notepad, project management tools, client relationship management tools (CRM), knowledge management tools, a wiki and a CMS. (297 stars, GPL-2.0, PHP)
- [Group Office](https://appsgit.com/apps/group-office): Enterprise CRM and groupware tool. Share projects, calendars, files and e-mail online with co-workers and clients. (280 stars, AGPL-3.0, PHP)
- [Tracim](https://appsgit.com/apps/tracim): Collaborative Platform for team collaboration: file,threads,notes,agenda,etc. (275 stars, AGPL-3.0, Python)
- [dayGLANCE](https://appsgit.com/apps/dayglance): Day planner with drag-and-drop time blocking, inbox, recurring tasks, habits, routines, goals, projects and Pomodoro focus mode, plus iCal and CalDAV calendar sync. Data stays in the browser, with… (164 stars, MIT, JavaScript, Docker)
- [Tine](https://appsgit.com/apps/tine): Software for digital collaboration in companies and organizations. From powerful groupware functionalities to clever add-ons, tine combines everything to make daily team collaboration easier. (22 stars, AGPL-3.0, HTML, Docker)

## Replaces

- [Open-source alternatives to Google Calendar](https://appsgit.com/alternatives/google-calendar)

## Related categories

- [Booking & Scheduling](https://appsgit.com/categories/booking-scheduling): Appointment, resource and event booking software. Let people book meetings, rooms or tickets on your own domain.
- [File Sync & Storage](https://appsgit.com/categories/file-sync-storage): Private cloud storage and file synchronization across devices. A self-hosted alternative to Dropbox and Google Drive.
- [File Managers](https://appsgit.com/categories/file-managers): Browser-based file managers for browsing, uploading and editing files on a server. Handy for NAS boxes and VPS administration.
- [Feed Readers](https://appsgit.com/categories/feed-readers): RSS and Atom feed readers and aggregators. Follow blogs and news in a clean timeline you control.
- [Note-taking & Editors](https://appsgit.com/categories/note-taking): Note apps, Markdown editors and collaborative writing tools. A private alternative to Notion, Evernote and Google Docs.
- [Photo Galleries](https://appsgit.com/categories/photo-galleries): Photo backup, galleries and albums with face and object search. A self-hosted alternative to Google Photos and iCloud.

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