# Alinto/sogo

SOGo is a very fast and scalable modern collaboration suite (groupware). It offers calendaring, address book management, and a full-featured Webmail client along with resource sharing and permission handling. It also makes use of documented standards (IMAP, CalDAV, CardDAV, etc.) and thereby provides native connectivity (without plugins) to many clients such as Microsoft Outlook, Apple iCal, the iPhone, Mozilla Lightning, and a plethora of mobile devices.

Repository: https://github.com/Alinto/sogo
Canonical: https://ross.abutalabs.com/products/sogo
Homepage: http://sogo.nu/
Language: Objective-C
License: GPL-2.0
License Family: copyleft
Topics: sogo, objective-c, groupware, angularjs-material
Last push: 2026-08-25T13:37:15+00:00

## Health v2 (maintenance only)
Score: 94/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 85, longevity 100
- inputs: {"age_days": 5097, "days_push": 8, "days_rel": 20, "gap_med": 40.0, "n_releases_24m": 13}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2153, forks 319 (observed 2026-08-28T04:06:19.491161+00:00)

## What it is
SOGo is an open-source groupware (collaboration) server offering webmail, shared calendars, address books, and tasks. It uses open standards like IMAP, CalDAV, CardDAV, and ActiveSync to provide native connectivity to clients such as Outlook, Apple devices, Thunderbird, and mobile phones.

## Use cases
- self-host a webmail and calendar server for my organization
- share calendars and address books across a team
- sync email, contacts, and events with iPhone and Android via ActiveSync
- replace Microsoft Exchange with an open-source groupware suite
- provide CalDAV and CardDAV endpoints for Apple Calendar and Thunderbird
- give thousands of users a scalable web-based collaboration interface

## When to choose
- you need a self-hosted, standards-based alternative to Exchange or Google Workspace
- you want native client support (Outlook, Apple, Thunderbird) without plugins
- you need proven scalability for large deployments with thousands of users

## When to avoid
- you only need a lightweight mail transfer agent or simple IMAP server without groupware features
- you want a modern single-page app stack rather than an Objective-C/SOPE-based server
- you need a SaaS solution without server administration

## Facets
- artifact type: application
- maturity: stable
- function: http-server, email, scheduling, web-framework
- domain: self-hosted, email, developer-tools, web-development
- platform: self-hosted
- tags: groupware, caldav, carddav, webmail, activesync, imap, collaboration, objective-c, linux, web-server

## Member repositories
- Alinto/sogo (main) score 94

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:19.491161+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:50:37.696144+00:00, confidence not recorded.
  - readme: https://github.com/Alinto/sogo (fetched 2026-08-28T04:06:19.491161+00:00, sha 2fdc81e5668e)
  - homepage: http://sogo.nu/ (fetched 2026-08-29T10:30:40.155763+00:00, sha b5fec16e853d)
  - site_page: https://www.sogo.nu/about.html (fetched 2026-08-29T10:30:40.165100+00:00, sha 21f8dc64eddc)
  - site_page: https://www.sogo.nu/frequently-asked-questions.html (fetched 2026-08-29T10:30:40.168984+00:00, sha 9722c1af5805)
- Data as of 2026-08-30T08:39:29.467469+00:00.