SOGo
SOGo is a free, open-source, self-hosted groupware server for sharing organizational email, calendars, and address books.
What SOGo is
SOGo is a free, open-source, self-hosted groupware server for sharing organizational email, calendars, and address books. Its AJAX web interface provides access to messaging and calendar data, while CalDAV, CardDAV, IMAP, SMTP, and Microsoft Exchange ActiveSync connect clients and synchronize information. Listed clients include Mozilla Thunderbird, Microsoft Outlook, Apple Calendar and Contacts, and ActiveSync-compatible devices. Users can share mail, calendars, and address books with individual or group rights, and delegate mailbox access or invitations. Mail features include multiple IMAP accounts, server-side filtering, custom identities, forwarding, and auto-replies. Security options include authenticator-app two-factor authentication, password policies, S/MIME signing and encryption, and single sign-on through CAS, WebAuth, or Kerberos. SOGo can reuse existing IMAP, SMTP, database, and LDAP services, including Active Directory, OpenLDAP, MySQL, and PostgreSQL. Linux packages and a testing virtual appliance are available. Community help is provided through mailing lists, with paid support packages listed separately.
Good
- Free open-source server under GNU GPL/LGPL
- Supports major mail and calendar protocols
- Sharing permissions and delegation are included
- Offers two-factor authentication and single sign-on
- Can reuse existing directory and database services
Watch out
- Self-hosted deployment requires infrastructure management
- Premium support excludes installation and custom development
- Premium support does not commit to resolution times
- No free trial is offered
Who it suits
It suits organizations wanting self-hosted shared mail, calendars, and contacts across diverse clients and existing infrastructure.
Verdict
SOGo combines broad protocol support, collaboration permissions, mail tools, and security controls in software organizations host themselves. It is a strong fit for teams comfortable managing infrastructure, while commercial support has defined exclusions.
Plans and prices
From SOGo's own pricing page, checked 12 Oct 2001.
| Plan | Price | What it gives you |
|---|---|---|
| SOGo | Free | Free and open-source groupware server · GNU GPL/LGPL v2 and above |
| Community support | Free | Mailing list · FAQ · Documentation · No official release access |
| Sponsorship | $500 a year | Release access · Nightly builds · Support via mailing list, FAQ, and documentation · Unused tickets are not extended · One-year prepaid contract |
| Silver | $1,500 a year | 10 incidents · 4-business-hour acknowledgement · Release access · Bug fixes for current version · Portal tickets and live Visio · One-year prepaid contract |
| Gold | $5,000 a year | 30 incidents · 2-hour acknowledgement · 4 consulting hours · Priority bug fixes · Portal tickets and live Visio · One-year prepaid contract |
| Platinum | $7,500 a year | 50 incidents · 2-hour acknowledgement · 6 consulting hours · Priority bug fixes · Portal tickets and live Visio · One-year prepaid contract |
The facts
Each one read from SOGo's own pages, with the date it was checked.
Where it runs
- App coverage
- allchecked 21 Sep 2001
What it does
- Backends
- SOGo can reuse existing IMAP, SMTP, database, and LDAP services, including Active Directory, OpenLDAP, MySQL, and PostgreSQL.checked 12 Oct 2001
- Calendar tools
- Yeschecked 21 Sep 2001
- Client integrations
- The maker lists Mozilla Thunderbird, Microsoft Outlook, Apple Calendar and Contacts, and ActiveSync-compatible devices as supported clients.checked 12 Oct 2001
- Collaboration
- Users can share mail, calendars, and address books with per-person or per-group rights, and delegate mailbox access or invitations.checked 12 Oct 2001
- Current release
- The download page lists SOGo 5.12.11, released September 14, 2026.checked 12 Oct 2001
- Deployment
- SOGo is self-hosted software with packages for Linux distributions and a Zero Effort Groupware virtual appliance for testing.checked 12 Oct 2001
- Mail tools
- Features include multiple IMAP accounts, server-side mail filtering, custom identities, forwarding, and auto-replies.checked 12 Oct 2001
- Open protocols
- SOGo uses CalDAV, CardDAV, IMAP, SMTP, and Microsoft Exchange ActiveSync to connect clients and synchronize information.checked 12 Oct 2001
- Product
- SOGo is an open-source groupware server for sharing organizational email, calendars, and address books.checked 12 Oct 2001
- Scale
- The maker says SOGo can scale from a handful to hundreds of thousands of users through a horizontally expandable architecture.checked 12 Oct 2001
- Security
- Listed security features include authenticator-app two-factor authentication, password policies, S/MIME signing and encryption, and single sign-on via CAS, WebAuth, or Kerberos.checked 12 Oct 2001
- Support
- Community help is available through a mailing list, while Alinto offers commercial support packages and documentation is provided online.checked 12 Oct 2001
- Support limits
- Premium support excludes component installation, custom development, preventive monitoring, training, and documentation, and it does not commit to issue resolution times.checked 12 Oct 2001
- Web interface
- SOGo provides an AJAX-based web interface for accessing messaging and calendaring data.checked 12 Oct 2001
Money
- Free plan
- Yeschecked 21 Sep 2001
Alternatives to SOGo
- 1
Zoho Mail
Free planAndroidiOSWebAPI9.0From $0.08 a month - 2
Mailbutler Smart Assistant
Free planAndroidiOSWebExtension8.9From $7 a month - 3
Spike
Free planAndroidiOSWebmacOS8.5From $4 a month - 4
eM Client
Free planAndroidiOSmacOSWindows8.4From $3.33 a month - 5
Front
AndroidiOSWebAPI8.4From $25 a month - 6
Newton Mail
Free planAndroidiOSmacOSWindows8.4From $5 a month