About Tender365



Tender365 was initiated in the middle of 2017 as an idea of four energy supply companies as part of a design sprint led by EXXETA. From the very beginning, the idea was to get various companies from the sector inspired about the platform through the opportunity to participate in Tender365. The platform’s test version was available in summer 2017 and continued to develop further through the participation of energy suppliers and municipal utility organisations.

The platform is operated by Tender365 GmbH located in Leipzig. The founding shareholders of Tender365 GmbH are the initiators EXXETA AG and GasVersorgung Süddeutschland GmbH as well as eins energie in sachsen GmbH & Co. KG. Further potential stakeholders are also ready to join the company and corresponding negotiations are in progress.


A characteristic of the company is that the shareholder combine various market roles of the energy market. EXXETA, as an IT solution provider active in the energy sector, but also in other sectors such as automotive and finance, ensures quality and topicality of the platform. GVS and eins energie, as innovative energy companies, contribute their experience in the areas of trading, procurement and sales as well as their networks. Due to their experiences in the market, they are aware of the challenges in the commodity business and of customer requirements.

The company is led by directors Frank Sonne (EXXETA) and Helmut Kusterer (GVS). The Tender365 team is being strengthened by Markus Jungmann for Business Development & Sales as well as Andreas Langer as Product Owner for the platform software. All four are available to you to answer your questions and are responsible for the reliable operation as well as functional and technical development of the platform.

We are open to any suggestions you may have. You are warmly invited to become a part of the company and join us in taking the platform to even greater heights.


Cooperation partners

Strategic partnership with e.less

Together with e.less, the first online marketplace for commercial power and gas, we are jointly offering utilities a solution for end-to-end digital procurement and sales of power and gas. Thus, the entire process chain for power and gas is mapped end-to-end and without media discontinuity. A shared front-end builds the basis. Therefore, utilities and other energy suppliers can automatically transfer the data of their power and gas contracts from e.less to the Tender365 platform. The benefits for our users? Easier and faster procurement and elimination of manual transfers of data from one system to another.

appygas and Tender365 cooperate to simplify the life of buyers and traders

appygas is a portal that provides its users with all the relevant European gas market data such as gas flows, hub and transport prices, or maintenance schedules, in one convenient place, making the gas market easy to understand. appygas collects data from more than 40 European sources, harmonizes and aggregates them and finally visualizes the results in a very efficient and user-friendly way. It enables participants to monitor the European gas market fundamentals, maintenances and to calculate the natural gas transportation costs through Europe. Customers can access the service using a web browser or an API access.

Users of Tender365 get a great benefit: We double the free testing period of appygas. Please don’t hesitate to contact us!


Frank Sonne
Management Board
Helmut Kusterer
Management Board
Markus Jungmann​
Head of Business Development & Customer Care
Andreas Langer​​
Head of Product Management & Development​

Sales Support

Steffen Fogl
Key Account Manager GasVersorgung Süddeutschland GmbH
Maria-Pia Speidel
Key Account Manager GasVersorgung Süddeutschland GmbH
Christian Scholz
Key Account Manager Gas-Union GmbH

Advisory Board

Dr. Claus Bergschneider
Managing Director of cbc consulting & engineering GmbH
Michael Karasz
Founder & Managing Director THE ENERGY HOUSE GmbH
Alexander Schießl
Managing Director of e.less GmbH
Prof. Dr. Felix Müsgens
Chair of Energy Economics at Brandenburg University of Technology Cottbus-Senftenberg
Dr. Johannes Angloher
Managing Director Syneco Trading GmbH

Tender365 Ambassadors

Ulrich Floß


Contact us

Tender365 is a solution you can proactively shape to your needs. Why not join the platform as an equal partner or register as an active trading participant?
Register now!

Send us an e-mail or call us: +49 341 49635-501