OBM
Access your enterprise from everywhere·obm.org
OBM is a free, open-source messaging and collaboration (groupware) platform supporting shared calendars, contacts, tasks, and email for anywhere from a couple to thousands of users. It offers a web interface, strong mobile device support via ActiveSync, and connectors for Thunderbird/Lightning and Outlook. OBM also provides a provisioning API for creating users and groups in bulk.
What it's for
Features 20
- ActiveSync support for smartphones (iOS, Windows Phone, Android, BlackBerry)
- Advanced resource management
- Antivirus & antispam, SSL access, backups, high availability
- Automatic email forwarding
- Centralized administration and batch management
- Fine-grained rights management (delegation)
- Group mailing lists
- Import/export ICS files
- MAPI-based Outlook groupware connector with calendar/contacts/task sync
- Meeting scheduling
- Multi-domain and sub-domain handling
- POP/IMAP/SMTP support
- Private and public contacts
- PST import in Thunderbird
- Server side vacation message
- Shared calendars for users, groups and resources
- Shared mailboxes
- Tasks management
- Thunderbird/Lightning and Outlook connectors
- Webmail access in web interface
At a glance
Integrations
Resources
Pricing
OBM itself is free with no license cost and no freemium offer; a separate paid SaaS hosting option is offered through Linagora but pricing is not publicly listed.
Free as in speech and free as in beer; no license cost, no freemium offer.
No stated user limits; scales to thousands of users
Site mentions 'Ask Linagora for a paid SaaS account' with no price stated; appears quote-based.