Turnkey Open-Source Infrastructure —
Software, Hardware, and Expertise in One
Deploy enterprise-ready open-source platforms — Proxmox, Nextcloud, OPNsense, ERPNext,
and more — pre-installed on optimized Holstein hardware and fully supported by certified engineers.
Fast Deployment
Ready-to-deploy infrastructure in weeks,
not months
Enterprise Security
GDPR-aligned, encrypted, and
fully auditable
Complete Stack
Hardware, software, and support
in one solution
Holstein delivers the power of open-source — without the complexity.
We combine proven open-source platforms with validated enterprise hardware, so you get a
production-ready infrastructure with predictable results.
All-in-one approach
Hardware, software, and deployment handled by one team
Certified expertise
Engineers specialized in virtualization, storage, and networking
Security & compliance
GDPR-aligned architectures, strong encryption, and full auditability
Scalable & future-proof
Start with one stack and expand over time
Full lifecycle management
From design to support and ongoing optimization
99.9%
Uptime SLA
Enterprise-grade reliability with proven open-source platforms
24/7
Monitoring
15min
Response Time
Our Turnkey Stacks
Each solution is available as a ready-to-deploy stack on Holstein hardware.
Proxmox Virtualization
Nextcloud Collaboration
Coming Soon
Holstein Enterprise Hardware
Our turnkey appliances combine performance, reliability, and silence — purpose-built for
open-source workloads.
Compute Nodes
Proxmox-ready servers optimized for virtualization and containers
Storage Systems
High-throughput ZFS/NVMe arrays for Nextcloud or Ceph clusters
NetworkAppliances
OPNsense-ready firewalls and routers with 10/25/40/100 GbE
Edge Devices
Compact, low-noise systems for remote offices or IoT environments
Each unit ships with:
Full burn-in and performance testing
Firmware lifecycle management
Remote monitoring and support options
We don’t just deliver hardware —
we deliver outcomes.
Architecture & Design
Capacity planning, HA, DR,
and security models
Implementation & Migration
Full deployment or migration from VMware / Microsoft 365 / Google Workspace
Managed Support (SLA)
Silver, Gold, and Platinum tiers, with optional 24×7 coverage
Training & Documentation
Workshops, admin guides, and operational handbooks
Continuous Optimization
Monitoring, patch management, and version upgrades
How It Works
Discovery Call
Understand your needs, environment, and goals
Architecture & Quote
Define hardware, software stack, and timeline
Build & Deployment
Implementation, testing, and handover
Operate & Supportrt
Monitoring, maintenance, and scaling
Industries We Serve
Testimonials
— CTO, Tech Startup
“Holstein delivered our Proxmox cluster in less than a month. Reliable, fast, and transparent from day one.”
— IT Director, Manufacturing
“Nextcloud with OnlyOffice on Holstein hardware gave us full control over our collaboration — no more vendor lock-in.”
F.A.Q.
Frequently Asked Questions
Is open-source reliable for enterprise?
Absolutely. We only integrate mature, widely adopted OSS platforms with enterprise-grade support and SLAs.
Do you provide both hardware and software?
Yes — that’s our core value. Everything works together out-of-the-box.
Can you migrate from VMware or Microsoft environments?
Yes — migrations from VMware, Hyper-V, Google Workspace, or 365 are a core service.
What support tiers do you offer?
Silver, Gold, and Platinum — each with defined response and resolution targets.
Where are you located?
We serve clients across EMEA with remote delivery and optional on-site engagements.
Ready to modernize
with open-source —
without complexity?
Let’s discuss your requirements and design the perfect solution.