Sovereign Proxmox Cloud on STACKIT
STACKIT is the sovereign cloud of the Schwarz Group (Lidl, Kaufland) - European ownership, C5 Type 2 attestation, KRITIS-proven. We build and operate your Proxmox cluster on hardware you own, hosted in STACKIT data centers.
Companies worldwide trust WZ-IT
The following are trademarks of their respective owners: Proxmox VE (Proxmox Server Solutions GmbH), STACKIT (STACKIT GmbH & Co. KG (Schwarz Gruppe)). WZ-IT is an independent service provider and has no business, partnership, or contractual relationship with these companies. We offer independent migration, installation, hosting, and operations services.
The German answer to AWS and Azure
When data sovereignty is non-negotiable and CLOUD Act exposure is a showstopper.
European ownership
Operated by Schwarz Digits (Schwarz Group: Lidl, Kaufland). Companies, data centers and servers exclusively in Europe - US legal access such as via the CLOUD Act can thus be architecturally avoided.
C5 Type 2 attestation & ISO 27001
BSI C5 Type 2 attestation for STACKIT cloud services, ISO 27001 based on IT-Grundschutz, TISAX Level 3, ISAE 3000/3402. The data centers are certified to TSI and DIN EN 50600.
Data centers in DE & AT
Certified locations in Neckarsulm and Ellhofen (Germany) and Ostermiething (Austria) - georedundant and exclusively under European law.
Government & KRITIS proven
Procured by the EU Commission at the highest sovereignty level (SEAL-3), cloud foundation of the German federal AI platform, strategic BSI partnership - STACKIT has arrived in the public sector.
Who is STACKIT the right choice for?
Industries with highest compliance requirements benefit most from sovereignty guarantees.
Public Administration
Federal authorities, state administration, municipalities. Sovereign Proxmox platform with BSI-compliant infrastructure.
Healthcare
Hospitals, medical care centers, insurers. Processing of health data under strictest GDPR requirements.
Finance & Insurance
Banks, savings banks, insurers. BaFin-compliant cloud infrastructure without CLOUD Act exposure.
KRITIS Operators
Energy, water, transport, telecom. Critical infrastructures with layered security controls and availability requirements.
Proxmox on STACKIT - turnkey
We handle the setup of your Proxmox infrastructure on STACKIT, from architecture and migration to ongoing operations with a selectable service level.
All Proxmox servicesArchitecture consulting
Cluster topology for STACKIT
Migration & setup
From AWS/Azure or on-prem
BSI C5 mapping
Compliance documentation
Managed operations
24/7 monitoring, selectable service level
STACKIT 2026: from newcomer to government cloud
Choosing STACKIT in 2026 is no longer betting on an experiment. Within months, the platform has collected Europe’s biggest sovereignty references:
Strategic BSI partnership
Schwarz Digits and the German Federal Office for Information Security agree on a strategic partnership at the Munich Security Conference.
EU Commission: highest sovereignty level
STACKIT becomes one of four providers in the EU Commission’s sovereign cloud procurement - as a provider at the highest level, SEAL-3 ("Digital Resilience").
The Netherlands choose STACKIT
The Dutch government names STACKIT its official European cloud alternative; a sovereign cloud for the Netherlands is being built with KPN.
Cloud foundation of the federal AI platform
STACKIT provides the cloud infrastructure for the German federal AI platform (BMDS) - with BYOK/HYOK key management and a zero-trust architecture.
How Proxmox runs on STACKIT: your hardware, certified data centers
STACKIT does not rent out bare-metal servers - and that is exactly what makes the model so sovereign: your Proxmox cluster runs on hardware you own, in STACKIT colocation (racks from 47 rack units, lockable cages or private rooms). Full control over the hypervisor, no foreign virtualization layer beneath it.
Your hardware in the STACKIT DC
We specify the hardware (sizing, ECC RAM, enterprise SSDs with PLP, redundant NICs) - you purchase it directly via your vendor, and it is yours from day one. We help coordinate the colocation in Neckarsulm, Ellhofen or Ostermiething.
Cluster build by WZ-IT
Proxmox VE 9 with ZFS or Ceph, dedicated corosync network, PBS backups with offsite copy, hardening per our security baseline - fully documented.
Operations & monitoring
Updates in maintenance windows, 24/7 monitoring via our Zabbix cluster, fixed response times - as Managed Proxmox from €179.90 per node per month.
Workloads that do not need their own hypervisor can additionally run on the STACKIT Compute Engine (C5 Type 2 scope) - we combine both in one architecture. Ongoing operations are covered by Managed Proxmox.
Further Proxmox guides
In-depth knowledge from our Proxmox knowledge base.
Plan Proxmox with the selected provider
Name provider resources, required topology, and affected workloads.
STACKIT is the sovereign cloud of Schwarz Digits, the IT division of the Schwarz Group (Lidl, Kaufland) - by its own positioning the first European hyperscaler. Certified data centers are located in Neckarsulm, Ellhofen (Germany) and Ostermiething (Austria). In 2026, STACKIT was procured by the EU Commission at the highest sovereignty level (SEAL-3) and provides the cloud foundation of the German federal AI platform; a strategic partnership with the BSI has been in place since February 2026.
No. STACKIT offers cloud services (Compute Engine, Kubernetes, storage) and colocation, but no rentable bare-metal servers. Proxmox on STACKIT therefore means: your own hardware in STACKIT colocation (racks from 47 rack units, cages or private rooms). That is more sovereign than any rental model - the hardware is yours, and we plan, build and operate the cluster on it.
Both have their place. The STACKIT Compute Engine provides VMs within the C5 Type 2 scope - good for standard workloads. Proxmox on your own hardware gives you full control over hypervisor, storage (ZFS/Ceph) and network, predictable fixed costs instead of consumption billing, and a stack that can be migrated to Hetzner, OVH, IONOS or on-premises at any time. We combine both layers where it makes sense.
For comparable compute: yes. STACKIT positions itself in the premium segment with published price lists for cloud services; colocation is on request. The premium buys the compliance layer: C5 Type 2 attestation, TISAX Level 3, KRITIS references and the public-sector traction that Hetzner does not offer. In the intro call we calculate whether that pays off for your case.
Yes. Since we use Proxmox VE (an open standard) and the hardware is yours, your VMs can be migrated to another Proxmox cluster at Hetzner, OVH, IONOS or on-premises at any time. No vendor lock-in - neither with STACKIT nor with us.
Three components: your hardware (a one-off purchase made directly by you or via your vendor - we provide the specification), the STACKIT colocation (a contract between you and STACKIT, depending on rack needs and power) and our build plus operations - which runs as Managed Proxmox transparently from €179.90 per node per month. We create a concrete overall framework after the architecture workshop.
Let's talk about your project - honest and no strings attached
- Straight with Timo and Robin - no sales team, no pitch
- An honest take, including when we are not the right fit
- Concrete next steps for infrastructure, software or AI
No risk: worst case, you leave with a clearer understanding of your project than before.
“WZ-IT's advice on our Azure migration was technically sound and completely non-binding right from the intro call - we took away a great deal.”
Proxmox proof from real projects
Customer feedback on virtualization, backup, VPN, security and ongoing cluster operations.
“Professional, honest and technically thoroughly sound: WZ-IT set up our Proxmox and backup infrastructure securely and future-proof. The consulting from Timo and Robin was objective and needs-driven, the implementation smooth and the final documentation exemplary. You can tell immediately that business-critical infrastructure is thought through holistically from the outset here and implemented with clear ownership.”
Pascal Block
Project Manager, Stadtwerke Brühl GmbH
Stadtwerke Brühl - municipal energy and infrastructure utility.
“WZ-IT provided very competent support in implementing our server and virtualization infrastructure. As part of the project, a Proxmox-based virtualization environment was set up along with a virtual machine for our application systems. Additionally, a structured backup concept was implemented. A particular focus was on security: the setup of a VPN tunnel and the clean implementation of encryption and access concepts were professionally executed. The structured consulting as well as the reliable and swift implementation deserve special mention. We are very satisfied with the services provided and are happy to recommend WZ-IT.”
John Hellmerichs
Managing Director, AInergy GmbH
AInergy - consultancy for energy and facility management.
“WZ-IT manages our Proxmox cluster reliably and professionally. The team handles continuous monitoring and regular updates for us and responds very quickly to any issues or inquiries. They also configure new nodes, systems, and applications that we need to add to our cluster. With WZ-IT's proactive support, our cluster and the business-critical applications running on it remain stable, and high availability is consistently ensured. We value the professional collaboration and the noticeable relief it brings to our daily operations.”
Pascal Hakkers
Aphy AG
Aphy AG - AI platform for hotel back-office.
“I recently worked with Timo and the WZ-IT team, and honestly, it turned out to be one of the best tech decisions I have made for my business. Right from the start, Timo took the time to walk me through every step in a simple and calm way. No matter how many questions I had, he never rushed me. The results speak for themselves. With WZ-IT, we reduced our monthly expenses from $1,300 down to $250. This was a huge win for us.”
Aleksandr Shuliko
CTO, EVA Real Estate
EVA Real Estate - leading real-estate agency in Dubai.
“Communication with WZ-IT was open, friendly and professional from the very beginning. Mr. Wevelsiep and Mr. Zins responded to every one of our questions patiently, promptly and respectfully, and contributed their own suggestions and good ideas on how to modernize our server infrastructure and adapt it even better to our needs. Throughout, WZ-IT consistently kept our need for data sovereignty and GDPR compliance in mind. Even short-notice adjustments and change requests from our side were implemented quickly and patiently and integrated consistently into the overall concept. From planning to the final handover, every step was documented transparently and comprehensively - so if a provider change should ever become necessary, the documentation would let us onboard a successor into our infrastructure very quickly. We are extremely satisfied with WZ-IT and hope to continue working together for a long time.”
Christoph Mußmann
Project Officer, DGHO e.V.
DGHO - German Society for Hematology and Medical Oncology.
“I got to know Timo and Robin as dedicated and professional partners who make a lot of things possible for their clients that initially seem impossible. I felt very well advised. The services offered have thoroughly convinced me. (translated)”
Andrea Pawlowski
Communications Manager, Golem.de
Golem.de - leading German IT news outlet.
“While looking for a partner to integrate a local AI solution, we came across Timo and Robin - and could not have made a better decision. They quickly understood our requirements and solved technical challenges competently and pragmatically. We were particularly impressed by the straightforward collaboration, their high level of expertise and the speed of implementation. We are delighted to have Timo and Robin at our side as reliable business partners and look forward to our next projects together. (translated)”
Henrik Jeche
Head of IT Administration
ml&s - full-service provider for the electronics industry.
“With Timo and Robin, you're not only on the safe side technically - you also get the best human support! Whether it's quick help in everyday life or complex IT solutions: the guys from WZ-IT think along with you, act quickly and speak a language you understand. The collaboration is uncomplicated, reliable and always on an equal footing. That makes IT fun - and above all: it works! Big thank you to the team! (translated)”
Sonja Aßer
Data Manager, ARGE
ARGE Neue Medien - master data & digital standards for plumbing and building technology.
“We have had very good experiences with Mr. Wevelsiep and WZ-IT. The consultation was professional, clearly understandable, and at fair prices. The team not only implemented our requirements but also thought along and proactively. Instead of just processing individual tasks, they provided us with well-founded explanations that strengthened our own understanding. WZ-IT took a lot of pressure off us with their structured approach - that was exactly what we needed and is the reason why we keep coming back. (translated)”
Matthias Zimmermann
Managing Director, Annota GmbH
Annota - healthtech startup with an AI documentation assistant.
“Timo and Robin from WZ-IT set up a RocketChat server for us - and I couldn't be more satisfied! From the initial consultation to the final implementation, everything was absolutely professional, efficient, and to my complete satisfaction. I particularly appreciate the clear communication, transparent pricing, and the comprehensive expertise that both bring to the table. Even after the setup, they take care of the maintenance, which frees up my time enormously and allows me to focus on other important areas of my business - with the good feeling that our IT is in the best hands. I can recommend WZ-IT without reservation and look forward to continuing our collaboration! (translated)”
Sebastian Maier
Managing Director, Yonju GmbH
Yonju - business coaching and AI products.
“Counting on WZ-IT team was crucial, their expertise and solutions gave us the pace to deploy in production our services, even suggesting and performing improvements over our configuration and setup. We expect to keep counting on them for continuous maintenance of our services and implementation of new solutions.”
Gabriel Sanz Señor
Managing Director, Odiseo Solutions
Odiseo Solutions - software engineering for the space industry.
“Professional, honest and technically thoroughly sound: WZ-IT set up our Proxmox and backup infrastructure securely and future-proof. The consulting from Timo and Robin was objective and needs-driven, the implementation smooth and the final documentation exemplary. You can tell immediately that business-critical infrastructure is thought through holistically from the outset here and implemented with clear ownership.”
Pascal Block
Project Manager, Stadtwerke Brühl GmbH
Stadtwerke Brühl - municipal energy and infrastructure utility.
“WZ-IT provided very competent support in implementing our server and virtualization infrastructure. As part of the project, a Proxmox-based virtualization environment was set up along with a virtual machine for our application systems. Additionally, a structured backup concept was implemented. A particular focus was on security: the setup of a VPN tunnel and the clean implementation of encryption and access concepts were professionally executed. The structured consulting as well as the reliable and swift implementation deserve special mention. We are very satisfied with the services provided and are happy to recommend WZ-IT.”
John Hellmerichs
Managing Director, AInergy GmbH
AInergy - consultancy for energy and facility management.
“WZ-IT manages our Proxmox cluster reliably and professionally. The team handles continuous monitoring and regular updates for us and responds very quickly to any issues or inquiries. They also configure new nodes, systems, and applications that we need to add to our cluster. With WZ-IT's proactive support, our cluster and the business-critical applications running on it remain stable, and high availability is consistently ensured. We value the professional collaboration and the noticeable relief it brings to our daily operations.”
Pascal Hakkers
Aphy AG
Aphy AG - AI platform for hotel back-office.
“I recently worked with Timo and the WZ-IT team, and honestly, it turned out to be one of the best tech decisions I have made for my business. Right from the start, Timo took the time to walk me through every step in a simple and calm way. No matter how many questions I had, he never rushed me. The results speak for themselves. With WZ-IT, we reduced our monthly expenses from $1,300 down to $250. This was a huge win for us.”
Aleksandr Shuliko
CTO, EVA Real Estate
EVA Real Estate - leading real-estate agency in Dubai.
“Communication with WZ-IT was open, friendly and professional from the very beginning. Mr. Wevelsiep and Mr. Zins responded to every one of our questions patiently, promptly and respectfully, and contributed their own suggestions and good ideas on how to modernize our server infrastructure and adapt it even better to our needs. Throughout, WZ-IT consistently kept our need for data sovereignty and GDPR compliance in mind. Even short-notice adjustments and change requests from our side were implemented quickly and patiently and integrated consistently into the overall concept. From planning to the final handover, every step was documented transparently and comprehensively - so if a provider change should ever become necessary, the documentation would let us onboard a successor into our infrastructure very quickly. We are extremely satisfied with WZ-IT and hope to continue working together for a long time.”
Christoph Mußmann
Project Officer, DGHO e.V.
DGHO - German Society for Hematology and Medical Oncology.
“I got to know Timo and Robin as dedicated and professional partners who make a lot of things possible for their clients that initially seem impossible. I felt very well advised. The services offered have thoroughly convinced me. (translated)”
Andrea Pawlowski
Communications Manager, Golem.de
Golem.de - leading German IT news outlet.
“While looking for a partner to integrate a local AI solution, we came across Timo and Robin - and could not have made a better decision. They quickly understood our requirements and solved technical challenges competently and pragmatically. We were particularly impressed by the straightforward collaboration, their high level of expertise and the speed of implementation. We are delighted to have Timo and Robin at our side as reliable business partners and look forward to our next projects together. (translated)”
Henrik Jeche
Head of IT Administration
ml&s - full-service provider for the electronics industry.
“With Timo and Robin, you're not only on the safe side technically - you also get the best human support! Whether it's quick help in everyday life or complex IT solutions: the guys from WZ-IT think along with you, act quickly and speak a language you understand. The collaboration is uncomplicated, reliable and always on an equal footing. That makes IT fun - and above all: it works! Big thank you to the team! (translated)”
Sonja Aßer
Data Manager, ARGE
ARGE Neue Medien - master data & digital standards for plumbing and building technology.
“We have had very good experiences with Mr. Wevelsiep and WZ-IT. The consultation was professional, clearly understandable, and at fair prices. The team not only implemented our requirements but also thought along and proactively. Instead of just processing individual tasks, they provided us with well-founded explanations that strengthened our own understanding. WZ-IT took a lot of pressure off us with their structured approach - that was exactly what we needed and is the reason why we keep coming back. (translated)”
Matthias Zimmermann
Managing Director, Annota GmbH
Annota - healthtech startup with an AI documentation assistant.
“Timo and Robin from WZ-IT set up a RocketChat server for us - and I couldn't be more satisfied! From the initial consultation to the final implementation, everything was absolutely professional, efficient, and to my complete satisfaction. I particularly appreciate the clear communication, transparent pricing, and the comprehensive expertise that both bring to the table. Even after the setup, they take care of the maintenance, which frees up my time enormously and allows me to focus on other important areas of my business - with the good feeling that our IT is in the best hands. I can recommend WZ-IT without reservation and look forward to continuing our collaboration! (translated)”
Sebastian Maier
Managing Director, Yonju GmbH
Yonju - business coaching and AI products.
“Counting on WZ-IT team was crucial, their expertise and solutions gave us the pace to deploy in production our services, even suggesting and performing improvements over our configuration and setup. We expect to keep counting on them for continuous maintenance of our services and implementation of new solutions.”
Gabriel Sanz Señor
Managing Director, Odiseo Solutions
Odiseo Solutions - software engineering for the space industry.
“Professional, honest and technically thoroughly sound: WZ-IT set up our Proxmox and backup infrastructure securely and future-proof. The consulting from Timo and Robin was objective and needs-driven, the implementation smooth and the final documentation exemplary. You can tell immediately that business-critical infrastructure is thought through holistically from the outset here and implemented with clear ownership.”
Pascal Block
Project Manager, Stadtwerke Brühl GmbH
Stadtwerke Brühl - municipal energy and infrastructure utility.
“WZ-IT provided very competent support in implementing our server and virtualization infrastructure. As part of the project, a Proxmox-based virtualization environment was set up along with a virtual machine for our application systems. Additionally, a structured backup concept was implemented. A particular focus was on security: the setup of a VPN tunnel and the clean implementation of encryption and access concepts were professionally executed. The structured consulting as well as the reliable and swift implementation deserve special mention. We are very satisfied with the services provided and are happy to recommend WZ-IT.”
John Hellmerichs
Managing Director, AInergy GmbH
AInergy - consultancy for energy and facility management.
“WZ-IT manages our Proxmox cluster reliably and professionally. The team handles continuous monitoring and regular updates for us and responds very quickly to any issues or inquiries. They also configure new nodes, systems, and applications that we need to add to our cluster. With WZ-IT's proactive support, our cluster and the business-critical applications running on it remain stable, and high availability is consistently ensured. We value the professional collaboration and the noticeable relief it brings to our daily operations.”
Pascal Hakkers
Aphy AG
Aphy AG - AI platform for hotel back-office.
“I recently worked with Timo and the WZ-IT team, and honestly, it turned out to be one of the best tech decisions I have made for my business. Right from the start, Timo took the time to walk me through every step in a simple and calm way. No matter how many questions I had, he never rushed me. The results speak for themselves. With WZ-IT, we reduced our monthly expenses from $1,300 down to $250. This was a huge win for us.”
Aleksandr Shuliko
CTO, EVA Real Estate
EVA Real Estate - leading real-estate agency in Dubai.
“Communication with WZ-IT was open, friendly and professional from the very beginning. Mr. Wevelsiep and Mr. Zins responded to every one of our questions patiently, promptly and respectfully, and contributed their own suggestions and good ideas on how to modernize our server infrastructure and adapt it even better to our needs. Throughout, WZ-IT consistently kept our need for data sovereignty and GDPR compliance in mind. Even short-notice adjustments and change requests from our side were implemented quickly and patiently and integrated consistently into the overall concept. From planning to the final handover, every step was documented transparently and comprehensively - so if a provider change should ever become necessary, the documentation would let us onboard a successor into our infrastructure very quickly. We are extremely satisfied with WZ-IT and hope to continue working together for a long time.”
Christoph Mußmann
Project Officer, DGHO e.V.
DGHO - German Society for Hematology and Medical Oncology.
“I got to know Timo and Robin as dedicated and professional partners who make a lot of things possible for their clients that initially seem impossible. I felt very well advised. The services offered have thoroughly convinced me. (translated)”
Andrea Pawlowski
Communications Manager, Golem.de
Golem.de - leading German IT news outlet.
“While looking for a partner to integrate a local AI solution, we came across Timo and Robin - and could not have made a better decision. They quickly understood our requirements and solved technical challenges competently and pragmatically. We were particularly impressed by the straightforward collaboration, their high level of expertise and the speed of implementation. We are delighted to have Timo and Robin at our side as reliable business partners and look forward to our next projects together. (translated)”
Henrik Jeche
Head of IT Administration
ml&s - full-service provider for the electronics industry.
“With Timo and Robin, you're not only on the safe side technically - you also get the best human support! Whether it's quick help in everyday life or complex IT solutions: the guys from WZ-IT think along with you, act quickly and speak a language you understand. The collaboration is uncomplicated, reliable and always on an equal footing. That makes IT fun - and above all: it works! Big thank you to the team! (translated)”
Sonja Aßer
Data Manager, ARGE
ARGE Neue Medien - master data & digital standards for plumbing and building technology.
“We have had very good experiences with Mr. Wevelsiep and WZ-IT. The consultation was professional, clearly understandable, and at fair prices. The team not only implemented our requirements but also thought along and proactively. Instead of just processing individual tasks, they provided us with well-founded explanations that strengthened our own understanding. WZ-IT took a lot of pressure off us with their structured approach - that was exactly what we needed and is the reason why we keep coming back. (translated)”
Matthias Zimmermann
Managing Director, Annota GmbH
Annota - healthtech startup with an AI documentation assistant.
“Timo and Robin from WZ-IT set up a RocketChat server for us - and I couldn't be more satisfied! From the initial consultation to the final implementation, everything was absolutely professional, efficient, and to my complete satisfaction. I particularly appreciate the clear communication, transparent pricing, and the comprehensive expertise that both bring to the table. Even after the setup, they take care of the maintenance, which frees up my time enormously and allows me to focus on other important areas of my business - with the good feeling that our IT is in the best hands. I can recommend WZ-IT without reservation and look forward to continuing our collaboration! (translated)”
Sebastian Maier
Managing Director, Yonju GmbH
Yonju - business coaching and AI products.
“Counting on WZ-IT team was crucial, their expertise and solutions gave us the pace to deploy in production our services, even suggesting and performing improvements over our configuration and setup. We expect to keep counting on them for continuous maintenance of our services and implementation of new solutions.”
Gabriel Sanz Señor
Managing Director, Odiseo Solutions
Odiseo Solutions - software engineering for the space industry.
Let's Talk About Your Idea
Whether a specific IT challenge or just an idea - we look forward to the exchange. In a brief conversation, we'll evaluate together if and how your project fits with WZ-IT.
Arrange a callback
Companies worldwide trust WZ-IT