Our Partnerships

Wolters Kluwer

Wolters Kluwer: the world’s top name in software and services for tax and bookkeeping. ADDISON has been part of Wolters Kluwer Software und Service GmbH since 2008.


Microsoft® is the world’s leading manufacturer of operating systems and applications. A close relationship with Microsoft® is facilitated by comprehensive support and up-to-date know how.

CISCO Systems

When it comes to security, we rely on products by Cisco Systems, alongside Microsoft solutions. They are the leading supplier of network solutions for internet connections.


INFOLOG GmbH has been developing software systems for many years to support tax departments continuously. With INFOLOG TAX SUITE, sophisticated processes such as tax balance sheet reporting, e-balance sheet generation or the tax audit workflow are fully covered.


Citrix Systems, Inc. is a leading supplier of virtualisation technologies, providing IT as an on-demand service. Citrix first become known for their applications and terminal server applications.

Kyocera Documents Solutions

Kyocera Mita Deutschland GmbH is a leading manufacturer of high-quality laser printers and digital copiers.


Protect your network infrastructure from internet threats such as hacking, spyware, viruses, phishing, spam and other malware.


Citrix Xen Server

Management and integration of virtual infrastructures with Citrix XenServer Software. Citrix offers competitive solutions for server consolidation that increase IT security and decrease costs.

Ripe NCC Member

A Regional Internet Registry (RIR) responsible for the allocation of IP address areas and AS numbers in Europe, the Middle East and Central Asia.


The Regify Group is an international provider for ‘Trusted eCommunications’. The patented and data protected regify technology facilitates verifiable and legally compliant eCommunication processes.


Plesk is a web server tool developed by Parallels Inc. for creating, securing, and running web pages and applications in the cloud.


The HausPerfekt GmbH & Co. KG has firmly established itself as a provider of high-quality software for professional real estate management and property management.

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