Hosting Large Language Models (LLM) in Germany - secure, high-performance and ready for operation. GDPR-compliant with dedicated GPU infrastructure.
Leading companies worldwide trust WZ-IT
This page is the operations layer of our AI offering: it carries the solutions you buy - from the offer finder to the internal assistant. The stack stays in your ownership throughout.
Large Language Models (LLM) are AI models that can understand and generate natural language. For companies, they offer enormous opportunities: from automating customer communication and intelligent document analysis to coding assistants and knowledge management.
With our LLM Hosting Germany, you can operate these powerful models in your own GDPR-compliant infrastructure - without having to pass on your sensitive data to global cloud providers.
Whether Llama 4, Qwen3, DeepSeek-R1 or other open models - we handle installation, operations and optimisation of your LLM infrastructure.
Full control over your AI infrastructure
Your data stays in Germany and is not transferred to third countries. That makes the GDPR case far simpler, without compromising on functionality.
In contrast to OpenAI, AWS or Azure, you have full control: no data transfer to third parties, no training with your data, no hidden API calls.
Meet strict compliance requirements in regulated industries such as healthcare, finance or public administration.
No hidden API costs, no surprises when it comes to billing. Predictable monthly fixed costs instead of pay-per-token with cloud providers.
Dedicated GPU resources without sharing. Optimal latency for your applications without dependence on global cloud services.
Fine-tuning and customization of your models to your specific requirements. No restrictions from API limits or vendor lock-ins.
What is needed for professional LLM hosting?
Hosting Large Language Models places special demands on the infrastructure. We ensure that everything is optimally configured.
LLMs need GPUs with enough VRAM. Rule of thumb for the weights: quantized (Q4) roughly half a gigabyte per billion parameters, in FP16 about four times that. Context and KV cache add on top depending on context length and concurrency - so we plan around 48 GB for Llama 3.1 70B and around 20 GB for Gemma 3 27B.
In addition to GPU memory, you need sufficient RAM (at least 64 GB) and fast NVMe storage for model files and caching. The model files themselves take roughly 15 GB (7B) to 150 GB (70B) on disk in FP16; quantized operation needs correspondingly less.
For production applications with multiple users, a stable, fast network connection is essential. Our servers offer gigabit connectivity with low latency within Germany.
The complete software stack including CUDA drivers, Ollama, OpenWebUI and container orchestration is installed, configured and kept up-to-date by us.
Professional monitoring of GPU utilization, temperature monitoring and security updates are part of the service. Automated backups are available as an option.
As requirements grow, we scale your infrastructure horizontally (multiple servers) or vertically (more powerful GPUs). Load balancing between multiple instances is possible.
We take care of everything - you simply use your LLMs
From initial setup to daily operations: Our Managed LLM Hosting handles all technical aspects.
On request: installation of the models you want (Llama, Qwen, Gemma, Mistral, DeepSeek, GPT-OSS), Ollama or vLLM as the model server, OpenWebUI as the web interface and optional API endpoints for your applications.
We monitor your LLM infrastructure around the clock, perform system updates and optimize GPU performance. How quickly we respond to an alert depends on the agreed service level.
Our team supports you with model selection, integration into your applications and optimization for your specific use cases. Priority support via email and optionally phone/video.
Fixed monthly costs without hidden fees, no pay-per-token billing. Monthly cancellation. We agree the concrete price based on the configuration in the initial call.
As a Managed Service customer at WZ-IT, you have access to our exclusive portal: Monitor your infrastructure in real-time, schedule maintenance, request quotes, and get direct support - all in one central location.
A selection of popular open-source LLMs
Meta's current generation as a mixture of experts: 109B parameters with 17B active per token, natively multimodal and a very long context. Runs on a single 96 GB card.
Google's most powerful model that runs on a single consumer GPU. Vision support for image analysis integrated.
Open reasoning model that exposes its chain of thought and supports tool calls.
European model from Mistral AI with a clear licence position - 24B dense, fits a 20 GB card and the obvious choice when model provenance matters.
Microsoft's compact 14B model with outstanding performance for its size. Optimal for resource-efficient deployments.
Alibaba's multilingual family under Apache 2.0, from 0.6B to 235B. A strong all-rounder with good coding and reasoning behaviour - the most common choice for local operation.
The easiest way to run LLMs locally. Perfect for development, prototyping, and small to medium production workloads.
High-performance inference engine for production workloads. Optimized for maximum throughput and minimal latency under high load.
Which framework is right for you?
We recommend Ollama for simple use cases, development and moderate load. For production applications with many concurrent users and high performance requirements, vLLM is the better choice. We're happy to help you choose!
Typical use cases and target groups
Offer your clients AI-powered services like content creation, SEO analysis or chatbots - with your own LLM infrastructure instead of expensive OpenAI API costs.
Universities, research institutions and educational organizations use their own LLMs for scientific work, studies and teaching without data privacy concerns.
SMEs in Germany use LLMs for internal knowledge bases, customer service automation, code analysis or document classification.
Connect your LLM with your own documents, wikis or databases. Employees ask questions in natural language and receive precise answers from your knowledge base.
Development teams use LLMs locally for code completion, review and documentation - without sending source code to external APIs.
Create product descriptions, marketing texts or social media content with your own LLM in your corporate language.
Analyze and classify large volumes of documents, contracts or emails automatically and GDPR-compliant.
With RAG, you connect your LLM with external knowledge sources. The model searches your documents and generates answers based on actual facts from your database. Ideal for company wikis, support databases or research archives.
Why self-hosting is often the better choice
| Feature | Self-Hosted (WZ-IT) | Cloud APIs (OpenAI, etc.) |
|---|---|---|
| Data Privacy | Hosted in Germany, GDPR compliant | Data goes to US providers |
| Costs | Fixed monthly costs | Variable token prices, often more expensive |
| Control | Full control over models | Dependency on provider |
| Customization | Fine-tuning possible anytime | Limited or expensive |
| Latency | Optimal (Germany) | Variable, depends on region |
| Availability | Dedicated resources, no rate limits | Rate limits, outages possible |
Everything you need to know about LLM hosting
Yes, you can use any open-source model that is compatible with Ollama or vLLM. This includes all common models like Llama, Gemma, Mistral, DeepSeek, Phi, and many more. We also support you with fine-tuning or converting your own models.
Absolutely. You can upgrade to a more powerful GPU at any time (e.g. from RTX 4000 to RTX 6000) or add additional servers for load balancing. We offer both vertical and horizontal scaling.
Every model that runs with Ollama or vLLM: Llama 4 (Scout, Maverick) and still Llama 3.3, Qwen3 (0.6B-235B), Gemma 3 (1B-27B), DeepSeek-R1, Mistral Small 3.2, Phi-4, GPT-OSS (20B, 120B) and hundreds more. The full list is at ollama.com/library. As of August 2026.
With Ollama on our RTX 4000 you can achieve about 10-15 tokens/second with Gemma 3 27B - an experience value, not a guaranteed performance level. With vLLM, significantly higher throughput is possible under high load; in its own benchmarks the vLLM project measures up to 24x more throughput compared to HuggingFace Transformers. Exact performance depends on the model, context length and the number of simultaneous requests.
Yes, both Ollama and vLLM provide OpenAI-compatible APIs. You can easily switch your applications by changing the API URL - the code remains almost identical. Additionally, there are native client libraries for Python, JavaScript, Go and more languages.
Our monitoring usually detects problems before they have an impact. In case of disruptions, we respond immediately. As a managed service customer, you have priority support via email, with optional phone/video support available.
Yes, depending on the available VRAM you can load multiple models in parallel or switch between them. Ollama manages this automatically. On the Pro configuration with 96 GB VRAM you can, for example, keep a 27B and a 7B model loaded at the same time.
We keep the system (OS, CUDA, Ollama/vLLM) up-to-date and install security updates promptly. Model updates are done on request - you decide when you want to use a new model release.
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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.”
ml&s speaks about integrating a local AI solution. The other voices cover architecture, data sovereignty and operations - exactly the maturity an AI project needs to reach production.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
“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.
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.
Leading companies trust WZ-IT
Timo Wevelsiep & Robin Zins
Managing Directors of WZ-IT
