grommunio review
A self-hosted email and groupware server with broad protocol support and tiered partner support.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Organizations that want to operate their own communications infrastructure can use grommunio for email and collaboration, either self-hosted or through a hosting partner. It combines mailbox services with a web client for calendars, contacts, notes, and tasks, and includes shared mailboxes, public folders, and global address lists. That makes it relevant to teams seeking an Exchange-compatible server with groupware rather than email delivery alone.
Protocol and ecosystem breadth are central to its fit. Mail services support SMTP, IMAP, and POP3, while Outlook connectivity uses MAPI/HTTP and Exchange Web Services. Exchange ActiveSync synchronizes mobile email, calendars, and contacts. LDAP and Active Directory support authentication and provisioning, and OpenID Connect and SAML 2.0 providers are listed as integrations. Migration tools cover Exchange PST imports and IMAP servers; multi-tenant services, delegated administration, and clustered high availability with failover address larger operational needs. Choose it when these compatibility and administration capabilities matter; a team needing only a basic hosted inbox may find this server scope unnecessary.
The Community plan is free for up to five users and is self-supported through community channels, with no manufacturer support. Basic costs €1.99 per user per month, with sales and support handled by a grommunio partner. Plus is €3.99 per user per month and adds partner support backed by grommunio; Business is €5.49 per user per month and adds enhanced response. Enterprise has a negotiated SLA, onboarding, and roadmap alignment. The published tiers make support level a key buying distinction: Community suits teams prepared to support themselves, while organizations requiring commercial assistance should consider a paid plan. Enterprise is suited to buyers who need negotiated service terms rather than a fixed listed price.
grommunio pros and cons
- Where it wins
- Supports Outlook connectivity and Exchange ActiveSync mobile sync.
- Combines mail, calendar, contacts, notes, tasks, and shared mailboxes.
- Offers LDAP and Active Directory provisioning plus migration tools.
- Where it doesn't
- Community is self-supported and has no manufacturer support.
- Commercial support depends on a grommunio partner.
- Enterprise pricing is negotiated rather than listed as a fixed monthly rate.
grommunio fact sheet, pricing and score →
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