Founded in 2025 in Frankfurt by Barbaros Özbugutu and Volkan Özkan, Donnerstag.ai is developing a customer accounts automation platform capable of detecting, in real time, discrepancies between services, invoices and payments.
The company is working to resolve invoicing errors, duplicates, missing lines or incorrect amounts which generate late payments and dry up suppliers’ cash flow. Its technology connects ERP, accounting software, banking systems and operational data to automatically reconcile each transaction.
This “AR automation” approach is gaining ground in industrial and logistics environments, where invoice volumes are exploding and undetected discrepancies prove very costly. With built-in machine learning, the platform improves as transaction volume increases, strengthening its ability to prevent and alert on financial anomalies.
To accelerate its growth in the DACH region, Donnerstag.ai has just raised 4.3 million euros in a seed round led by Speedinvest, with the support of QED Investors, Crestone VC and several European business angels. The funds will be used to strengthen discrepancy detection algorithms, further automate financial workflows and industrialize the onboarding of new suppliers.
