We build open clouds.
Developed by x-cellent technologies
x-cellent technologies GmbH is a specialized cloud service provider based in Munich, Germany.
As an experienced provider of highly secure IT infrastructures, x-cellent technologies develops solutions for companies with the highest demands on control, security, and digital sovereignty.
Through the development and operation of metalstack.cloud, the company combines years of open-source expertise with the ambition to actively shape independent cloud infrastructures in Germany and Europe.
Our mission
metalstack.cloud stands for digital sovereignty on bare metal — for companies who want to take control of their cloud environment: secure, independent, and Made in Germany.
We believe in a cloud infrastructure that operates openly, transparently, and without dependencies. Our vision is a sovereign European cloud — based on open standards, ready for sensitive workloads, operated with responsibility.
The team behind metalstack.cloud
CEO
CTO
Chief of Business Architecture
Director Sales
Head of Marketing
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Our Story
2000
Founding of x-cellent technologies GmbH in Munich
Driving innovation with a strong focus on quality, agility, and security from day one.
2020
Launch of the metal-stack project at FI-TS
Mission: Creating a secure, fully automated bare-metal platform tailored for banks and insurers.
2022
metal-stack goes open source
With production maturity, clear documentation, and full transparency, metal-stack opens up to the community.
2023
Beta launch of metalstack.cloud
A new platform offering for everyone – with a clear commitment to digital sovereignty.
2024
Official launch of metalstack.cloud
End of the beta phase and successful ISO 27001 certification for x-cellent technologies.
2025
Expanding our ecosystem
Launch of the metalstack.cloud On-Prem Starter. Active contributor to a sovereign European cloud with NeoNephos and ALASCA.
A strong network
Our Partners & Memberships
We rely on openness, collaboration, and transparency — that’s why we are part of strong networks that share the same values.
An x-cellent team
From Germany – for a sovereign Europe
Our location in Munich, in the heart of Germany and Europe, offers ideal conditions: a place where technological x-cellence meets European values.
From here, we work with strong partners across the DACH region to lay the foundation for an open, transparent, and independent cloud infrastructure – free from dependencies and aligned with the highest standards.
Get to know us!
We look forward to connecting — whether about our platform, your project, or digital sovereignty in the cloud.
Markus Fensterer
CEO
