Cloud & Hosting // CL / 2026

Cloud, sovereign.
From Germany.

Nextcloud, Microsoft 365, Mailcow or Proxmox: we set up your cloud and run it in German data centres. GDPR-compliant, with redundant backups and personal support.

Discuss cloud strategy View stack Configure cloud servers

Proxmox cluster with three-way Ceph replication and daily PBS backup

100

% EU-Hosting

Data centres in Germany

Backup paths: PBS and Bacula

1×

Daily backup

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What we host

06 platforms

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Nextcloud Hub

Your own cloud for files, calendars, Talk and Office. It runs entirely in German data centres, with no tracking and no ties to a US cloud.

Files Talk Office

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Email Hosting

Business email on Mailcow with ASSP spam protection and Sieve filters. It works with Outlook, Thunderbird and on mobile devices.

Mailcow ASSP DKIM

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Microsoft 365 support

Licensing advice, migration, configuration and ongoing operation of your M365 tenant, incl. Conditional Access, Intune and SharePoint.

M365 Intune Migration

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Server hosting & virtualisation

Dedicated and virtual servers on Proxmox VE with Ceph storage, automated snapshots and monitoring by our NOC.

Proxmox Ceph VM

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Cloud Backup

Managed Backup: encrypted backup of your servers and databases via Proxmox Backup Server or Bacula in data centres in Germany, optionally also in a second data centre.

PBS Bacula Encrypted

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Web hosting & domains

Reliable web hosting for company websites, Frappe, WordPress and PHP applications. SSL included, daily backups, personal support.

WordPress Frappe SSL

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Locations Germany

EU hosting only

BER-01

Berlin Tempelhof

Primary — own colocation

FRA-01

Frankfurt am Main

Backup Region

FKS-01

Falkenstein

Backup Region

GDPR All data stays within the EU. No sub-processing in third countries. On request we prepare the data processing agreement under Art. 28 GDPR.

Climate Our colocation space in Berlin Tempelhof is operated at 3U Telecom GmbH (ISO/IEC 27001), a subsidiary of 3U Holding AG, which generates renewable energy itself (53 MW wind and solar installed, expansion to 200 MW planned). More on our climate position on the About page.

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Migration with a plan

Four phases

Requirements

We analyse your requirements for performance, availability, data protection and integration with existing systems.

Provisioning

We build your cloud environment on our stack, using standardised templates for reproducible results.

Migration

We migrate your data, mailboxes and documents, with a sync in advance, a cut-over plan and a way back to the previous state.

Operation

Monitoring, backup, updates and support. We keep your cloud up to date, scale it to your needs and look after security.

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Our Stack

Open source first

Hypervisor

Proxmox VE

Open-source virtualisation with clustering and HA

Storage

Ceph

Distributed, self-healing object and block storage

Backup

Proxmox PBS

Incremental backups with verification

Files

Nextcloud

Files, Talk, Calendar, Mail, Office

Mail

Mailcow

Complete mail server suite with webmail

Reverse Proxy

Caddy

Automatic HTTPS and edge routing

Container

Docker

Reproducible workloads, cleanly separated

VPN

NetBird

Zero-trust mesh VPN for distributed sites

→ We build on proven open-source components. No vendor lock-in, full data sovereignty, clear licence costs.

FAQ

Frequent questions

05 answers

Q.01 Where exactly is my data stored?

Our primary servers are in our own colocation space in Berlin Tempelhof. Geographically separate backups run in German data centres in Frankfurt am Main and Falkenstein. No data is transferred to third countries outside the EU.

Q.02 What does a migration from Microsoft 365 or Google Workspace look like?

We move mailboxes, documents, calendars and contacts with proven migration tools. Beforehand we agree a detailed plan with you: a pre-sync of the data, a cut-over date and a way back if anything goes wrong. We usually switch over at the weekend so your team can work as normal on Monday.

Q.03 What happens if a data centre fails?

Our systems are designed so that failover mechanisms absorb the loss of a region. Backups are stored in separate locations and verified daily. We run restore tests regularly.

Q.04 Can I move only part of my infrastructure to you?

Yes, hybrid set-ups are part of our daily work, for example Nextcloud with us, Microsoft 365 with Microsoft and the server on your premises. We connect everything via SSO, VPN and clear interfaces.

Q.05 Who can access my data?

Only you and the staff you authorise. Our administrators need technical access for maintenance; every access is logged. On request we work with encryption keys controlled by you.

KAT

Building blocks from the Service catalogue

11 Building blocks

NDS-PVE-PBS

Managed Backup

We back up your servers, systems and databases with encryption and monitor every run. Depending on the system, we use Proxmox Backup Server in the Netsource data centre in Berlin or Bacula. You pay per backup job and per GB of data backed up.

Private cloud Fully sovereign

NDS-M365-BP

Microsoft 365 Business Premium

Microsoft 365 Business Premium for businesses with up to 300 users. We supply the licence as a Microsoft CSP partner and set up your tenant with mandatory MFA and Defender.

Public cloud Hyperscaler

NDS-M365-E3

Microsoft 365 Enterprise E3

Microsoft 365 Enterprise E3 for organisations with 300 or more employees. It includes the complete Office suite, Exchange Plan 2, 1 TB of OneDrive (expandable to 5 TB) and compliance features.

Public cloud Hyperscaler

NDS-PVE-VM

Proxmox VM on Private Cloud

A virtual machine on our Proxmox cluster in Berlin. You choose vCores, RAM and storage as needed, and backup is built in.

Private cloud Fully sovereign

NDS-WH-PLESK

Web hosting (Plesk)

Web space, databases and mailboxes for your website on Netsource's own servers in Berlin. You manage everything via Plesk, and SSL certificates, spam and virus protection and a daily backup are included. There are three packages, cancellable monthly.

Web hosting Fully sovereign

NDS-SEC-BCK-ACR-M365

Acronis Backup Microsoft 365

We back up your Microsoft 365 mailboxes, OneDrive, SharePoint and Teams with a second provider. The data is stored in Germany and stays available even if something goes wrong at Microsoft.

Hybrid

NDS-DOM-DE

Domain registration Germany

We register, manage and transfer domains under more than 1,000 extensions. In the Netsource DNS Service at dns.netsource.de you can also manage your domains yourself, around the clock. We have looked after more than 1,100 customer domains for years.

Domains Fully sovereign

NDS-WP-MAILCOW

Email Hosting

Email hosting with Mailcow in a German data centre, independent of Microsoft. You get a dedicated VM with your own IP addresses, IMAP, SMTP and ActiveSync, and built-in spam and virus filtering.

Fully sovereign

NDS-NET-NB

NetBird VPN connection

We connect your sites and staff with the NetBird mesh VPN. NetBird runs on our own platform, access is tied to each user's identity, and you no longer need a classic VPN concentrator.

Connectivity Fully sovereign

NDS-WP-NEXTCLOUD