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Cooperations Software 
Our software products are also available for numerous national system integrators. Thanks to the open architecture and based on the software development kit, they have created a variety of industry – or company-specific communications solutions. 


Citrix is a leading supplier of mobile workstations and offers new ways to improve working practices through virtualization, mobility management, networking and cloud services.

Am Söldnermoos 17, 85399 Hallbergmoos, Germany

Telephone +49 (811) 8300-00

Fax +49 (811) 8300-11

cobra GmbH (D)

Companies across Germany, Switzerland and Austria use cobra to optimize core processes in sales, marketing and service.

Weberinnenstrasse 7, 78467 Constance, Germany

Telephone +49 (7531) 8101-0

Fax +49 (7531) 8101-22

Coresystems AG (CH)

The international, Swiss-based company, offers cloud-based mobile field sales solutions and develops related apps and software for companies of all sizes.

Dorfstrasse 69 Villa im Park, CH-5210 Windisch, Switzerland

Telephone +41 (56) 444 20-40

Fax +41 (56) 444 20-50

FastViewer GmbH & Co. KG (D)

The young Bavarian firm FastViewer has been developing desktop sharing and web collaboration solutions since 2006, at locations in Germany and Austria. Its portfolio includes communications solutions for online meetings, web conferences and remote support.

Schwesterhausgasse 11, 92318 Neumarkt, Germany

Telephone +49 (9181) 509 56 0

Fax    +49 (9181) 509 56 29

Fiducia IT AG (D)

Fiducia IT AG, which has its headquarters in Karlsruhe, is an information technology provider within the cooperative FinanzGruppe organization. Over 650 of the approximately 1,100 German Volksbank and Raiffeisenbank institutions, as well as almost 50 private banks, use IT solutions from Fiducia and trust the high security standards of the Karlsruhe-based data center.

Fiduciastrasse 20, 76227 Karlsruhe, Germany

Telephone +49 (721) 40 04-0

Fax +49 (721) 40 04-4500

Microsoft Deutschland GmbH (D)

It is the second largest subsidiary of the Microsoft Corporation and is responsible for product marketing, customer and partner support in Germany. Microsoft is the world's leading manufacturer of standard software, services and solutions. estos has long held Microsoft Gold Partner status for application development.  

Walter-Gropius-Straße 5, 80807 München, Germany

Telephone +49 (89) 3176-0

Fax +49 (89) 3176-1000

Telegate AG (D)

Telegate AG is the second-largest German provider of regional advertising and telephone information. The online industry directory provides users with personal contact details, marketing information and new developments from the region. The estos MetaDirectory is also linked to this data.

Kruppstrasse 74, 45145 Essen, Germany

Telephone +49 (0201) 8099-0

Fax +49 (0201) 8099-999

Work4all (D)

For 20 years, the company has been supporting small and medium-sized businesses with its product Work4all. It offers a combination of CRM, ERP, project and quality management with the full integration of Microsoft Office/Outlook and Tobit David.

Bachstr. 6, 50858 Cologne, Germany

Telephone +49 (221) 948 623-0

Fax +49 (221) 948 623-11

proMX GmbH (D)

For around 15 years, the company has been supplying customized software concepts and offering personalized customer solutions as a result.

Nordring 100, 90409 Nürnberg, Germany

Telephone +49 (911) 239804-0

Fax +49 (911) 239804-2

SIEVERS-SNC Computer & Software GmbH & Co. KG (D)

The long-established estos partner offers a broad portfolio of products ranging from business management software solutions such as ERP, CRM or business intelligence solutions to infrastructure services such as servers and storage, as well as software and hardware-supported communications systems.

Hans-Wunderlich-Strasse 8, 49078 Osnabrück, Germany

Telephone +49 (541) 9493-0

Fax +49 (541) 9493-250

Step Ahead AG (D)

The software solutions from Step Ahead enable SME sector firms to manage customer relationship management processes more efficiently. Step Ahead uses modular ERP software for all parts of the company – from goods management, production and sales, to finance, marketing, customer administration and contract management.

Burgweg 6, 82110 Germering, Germany

Telephone +49 89 89 40 60 0

Fax +49 89 89 40 60 10

Register. Build up expertise and know-how. 

Increase the success of your business. Use the estos partner program and get a better grip of your business. Registration to become an estos reseller is the first step towards joining our program. Following successful registration, you will receive more detailed information about our training courses, including the programs and our next dates, as well as general information about the certification process. 

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