Transparent business licensing.
Scalable subscription models for enterprises, public institutions, managed service providers and cloud hosters — predictable pricing with full data sovereignty, without mandatory dependency on proprietary cloud platforms.
Choose the right subscription
Every plan ships the complete grommunio platform — what differs is the user count and the level of support.
| Community Free Up to 5 users. Self-supported via community channels — no manufacturer support. | Basic €1.99 / user / month From 6 users. Sales & support handled by your grommunio partner. |
Recommended
Plus €2.99 / user / month From 6 users. Partner support with grommunio backing. | Enterprise Custom From 1,000 users. Negotiated SLA, onboarding and roadmap alignment. | ||
|---|---|---|---|---|---|
| Applications | |||||
| grommunio Core Email · Calendar · Contacts · Tasks · Notes | |||||
| grommunio Meet | |||||
| grommunio Chat | |||||
| grommunio Files | |||||
| grommunio Office | |||||
| Enterprise & compliance | |||||
| grommunio Archive | |||||
| grommunio Mobile Device Management (MDM) | |||||
| Support | |||||
| Priority manufacturer support Escalation path directly to grommunio | — | — | — | — | |
All grommunio software features are included in every plan. Plans differ by user count and the level of support that comes with them.
Enterprise
1000+ users or a dedicated environment?
For large-scale, multi-tenant or dedicated deployments we'll put together a tailored offer — just tell us your key data.
Why become a grommunio customer?
- Open-source collaboration with native Outlook support — no plugins
- Feature-rich drop-in replacement for Microsoft Exchange
- Wide range of integration possibilities
- High scalability — from SMEs to enterprise
- Effort and cost minimization through optimized architecture
- Enterprise-grade security with complete data sovereignty
- GDPR, CCPA and ePrivacy compliant
- Archiving & discovery for legal and audit purposes
- Technical support by certified experts
Pricing — frequently asked questions
How is grommunio licensed?
grommunio is licensed through commercial per-user subscription models. Licenses are provided exclusively via certified partners who handle implementation, customer management, and first- and second-level support. The subscription includes regular security updates, software updates, and long-term maintenance for enterprise production environments.
Is there a free version of grommunio?
Yes. The grommunio Community Edition is open source and free of charge for up to five users. It is suitable for testing, proof-of-concept deployments or small installations without manufacturer support.
What does a commercial subscription include?
Commercial subscriptions include security-related updates, technical documentation, long-term maintenance and access to enterprise components depending on the subscription model.
How can I purchase licenses?
Licenses are distributed exclusively through certified grommunio partners. Upon request, we connect you with a qualified partner in your region.
Legal Notice: grommunio is an independent software product and is not affiliated with, endorsed by, or sponsored by Microsoft, Google, Amazon, Open-Xchange or any other third party. All product names, logos, brands and trademarks — including Microsoft 365, Microsoft Exchange, Microsoft Outlook, Google Workspace, Open-Xchange and Amazon Web Services (AWS) — are the property of their respective owners and are used solely for identification, comparison and contextual purposes. Their use does not imply any endorsement or affiliation.