Maesn is a Düsseldorf-based integration platform that offers a Unified API designed to connect ERP, accounting, CRM, payroll, billing and other business software. By abstracting disparate data models, the company enables developers to integrate systems such as Sage, DATEV, Visma eAccounting and Exact Online through a single interface. Current customers including HubSpot, Tipalti, Findity, Hero and clockin rely on Maesn to streamline data exchange with accounting platforms. The firm is enhancing its product with AI capabilities and intends to extend coverage to additional ERP, payroll and invoicing systems. Proceeds from its recent €2.3 million raise will also support the growth of customer success and engineering teams as well as an expanded partner ecosystem. While revenue or user counts were not disclosed, continued backing from venture investors highlights growing traction. Maesn positions itself as a critical interoperability layer amid rising demand for seamless data flows across financial and business applications.

Total raised

$3M

Funding rounds

1

Latest round

Equity

Latest activity

Nov 2025