ADDISON Connect is an integration/interface layer for the ADDISON accounting, payroll, and controlling suite (aimed at the German Mittelstand and related professional services ecosystem). It is designed to connect ADDISON applications to third-party or custom business systems (e.g., ERP/merchandise management, time tracking, HR systems) without relying on manual file exports/imports.
Wolters Kluwer describes the product as a "komfortable, dynamische Online‑Schnittstelle von und zu den ADDISON‑Anwendungen," and documents support for Microsoft COM-based development environments for embedding ADDISON functions into existing software landscapes and for pulling data from external systems into ADDISON. The vendor documentation also references access to the ADDISON Data Warehouse and availability of example interface implementations intended for adaptation by integrators.