German startup Donnerstag.ai raises €4.3 mn to stop invoice losses

Invoices slip through cracks every day, causing businesses to lose money without realising it. Frankfurt startup Donnerstag.ai wants to fix that. It just raised €4.3 million from investors including Speedinvest and QED Investors. The company uses AI to match deliveries, invoices and payments in real time, helping suppliers spot missing money before it’s written off.