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Scenario 1

Microsoft 365 → Open Source

From Outlook, Word and Teams to Nextcloud, Collabora, and Element. Email via your own servers (Mailcow, Stalwart) or European providers like Migadu.

Files & CollaborationNextcloud
Office DocumentsCollabora / OnlyOffice
Email & CalendarMailcow / Stalwart
Chat & VideoElement / Mattermost
35-55%Cost savings
3-4Months (50 users)
Microsoft 365 Open-Source Alternative
OutlookThunderbird
Word / Excel / PowerPointLibreOffice / Collabora
OneDriveNextcloud
TeamsElement (Matrix)
SharePointNextcloud + Collabora
ExchangeMailcow / Stalwart
Microsoft 365
Nextcloud + Collabora
Scenario 2

Cloud Repatriation: AWS / Azure / Google → Europe

The US Cloud Act allows American authorities to access data at US companies – regardless of where the servers are located. We bring your data back to Europe.

IaaS / VMsHetzner / IONOS
Object StorageHetzner / OVH
KubernetesIONOS / Scaleway
Managed ServicesOpen Telekom Cloud
100%GDPR-compliant
2-6Months migration
AWS US Cloud
EU European Cloud
Scenario 3

Windows → Linux

For many workstations, Linux is a full alternative. Browser, office, email – daily work functions seamlessly. We evaluate where the switch makes sense and which distribution fits.

Suitable forOffice, clerks, developers
Not suitable forCAD, SAP GUI, specialized software
DistributionsUbuntu LTS / Linux Mint
€150+Savings/year/PC
€0License costs
Windows
Ubuntu / Linux Mint
Scenario 4

Active Directory → Open Source Identity

User management without Microsoft. Keycloak or FreeIPA deliver enterprise-grade functionality under your own control: SSO, MFA, LDAP, SAML, OpenID Connect. It's the most complex migration, but also the most liberating.

SSO & FederationKeycloak
Directory ServiceFreeIPA / OpenLDAP
MFAKeycloak + TOTP/WebAuthn
HighComplexity
4-8Months
AD Active Directory
Keycloak / FreeIPA
Public Sector

For Government and Public Administration

Compliance requirements, public procurement rules, legacy IT landscapes – we understand the constraints. From local municipalities to state-level agencies, from schools to hospitals.

Proven open-source migrations across Europe:

Schleswig-Holstein (LibreOffice) French Gendarmerie (Ubuntu) Italian Military (LibreOffice) City of Munich (LiMux – lessons learned)

These examples demonstrate that open-source migration works in the public sector – at scale and sustainably.

Digital sovereignty for the public sector

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Which scenario applies to you?

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