Sovereign Cloud Stack

SCS Logo

Sovereign Cloud Stack (SCS) is cloud technology built entirely with Open Source Software -- as an alternative to propietary cloud technology. Only Open Source guarantees interoperability, transparency and independence from legal claims of third parties and thus from political interference.

By using the modular SCS Software stack, cloud providers can offer Infrastructure-as-a-Service and Container-as-a-Service without depending on other vendors.

SCS is using and standardizing existing and proven Open Source components such as e.g. Kubernetes and does extend them where required. Federated cloud services are enabled this way, and users can leverage distributed cloud services from several SCS operators. European companies thus have options all the way from running it themselves or using one or several service providers and thus have 100% freedom of choice avoiding lock-in effects and dependencies from providers from foreign jurisdictions.

By sharing and documenting best practices for operating such cloud stacks, the difficulty to provide high quality cloud services internally or publicly is vastly reduced.

Our target: Anyone can benefit from the SCS software stack by using it -- and by contributing to the open source code, one will increase the value of Gaia-X.

Read more about Sovereign Cloud Stack ...


The latest information of our project (announcements, blog, articles on us, conference contributions, ...) can be found on our news page.

Public tenders

The currently ongoing and upcoming tenders of the Sovereign Cloud Stack project can be found here.

Software and Documentation

Please check our Get It page.

Job openings

We're looking for a number of people that want to work on this project. Please check out our Jobs page.

GAIA-X – Federated Data Infrastructure

GAIA-X logo

On the digital summit 2019 in Dortmund, the GAIA-X project was launched by the german ministry of economic affairs and energy (BMWi). The goal of Gaia-X is the defintion and the setup of a secure and trustworthy data infrastructure for Europe. One of the defining properties of the targeted solution is the usage of open technologies.

A strong open infrastructure ecosystem is the foundation of digital sovereignty. Quelle: „GAIA-X: Technical Architecture (Release – June, 2020)“

Federal ministry for economy and energy

BMWi Logo

After providing funding for the Gaia-X Federation Services (GXFS), the Federal ministry for economy and energy (BMWi, Germany) is now supporting the Sovereign Cloud Stack project with 14.9M€.

The complete press release can also be found on our News page. An FAQ (in German) is available at the OSB Alliance. The OSB Allianceis hiring a growing team for the project.

QuotingThomas Jarzombek (Member of the German Parliament), BMWi representative for the digital economy and start-ups:

"With the Sovereign Cloud Stack, the GAIA-X project is increasingly being filled with life. As a contribution to European digital sovereignty, the technical foundation, the Cloud Stack, is to be implemented as an open source project in order to enable switching providers in the future. It will make it easier for medium-sized companies, but also for public administrations, to use the advantages of GAIA-X in specific projects. The Sovereign Cloud Stack will be closely linked to the core components of GAIA-X, the so-called Federation Services, the creation of which is also funded by the BMWi and is well advanced. Together with other funding measures such as the GAIA-X funding competition or for future investments in the vehicle industry (KoPa35c), the BMWi is lending considerable momentum to the implementation of GAIA-X."

Federal Agency for Disruptive Innovations


The Federal Agency for Disruptive Innovations - SPRIND - based in Leipzig closes a gap in the German innovation landscape: It finds answers to the unsolved technological, ecological and social challenges of our time and at the same time ensures that the added value of the resulting companies and industries remains in Germany and Europe.

The team around director Rafael Laguna de la Vera provides comprehensive support for inventors: SPRIND arranges financing, helps to find a founding team and creates connections to other experts from science and industry. People with groundbreaking ideas, proven expertise and passion are gathered at SPRIND.

One of the first projects supported by SPRIND is the "Sovereign Cloud Stack" project. It had a feasibility study performed in 2020 on the viability and chances of success for Sovereign Cloud Stack. With a successful result!

Supporting companies / organizations

23Technologies Logo
B1Systems Logo
Betacloud Logo
BMWi Logo
CityNetwork Logo
CloudAndHeat Logo
Dataport Logo
Dilossacon Logo
Gonicus Logo
Gridscale Logo
OpenInfra Logo
OpenSourceBizAlliance Logo
OpenXChange Logo
OVHCloud Logo
PlusServer Logo
Stackable Logo
StackHPC Logo
TSystems Logo
Univention Logo

project[at] +49-711-90715-390 Data Protection Statement Imprint OSBA

Sovereign Cloud Stack, SCS and the logo are registered trademarks of the Open Source Business Alliance e.V..
Other trademarks are property of their respective owners.