Frankfurt-based accounts receivable platform Donnerstag.ai raises €4.3 million to expand across DACH

German startup Donnerstag.ai, an accounts receivable management platform for suppliers, has raised €4.3 million in Seed funding to expand its presence across the DACH region.

The round was led by Speedinvest, with participation from QED Investors, Crestone VC, and several European business angels.

“Every year, suppliers lose billions because they lack transparency over what has been delivered, invoiced, and paid,” said Barbaros Özbugutu, co-founder and CEO of Donnerstag.ai. “With our AI-powered platform from Germany, we’re bringing clarity to a sector that is central to Europe’s competitiveness.”

In 2025, there have been several noteworthy funding rounds in the broader sector of accounts receivable and working capital automation across Europe.

Mimo, a UK/Stockholm-based company, raised €7.7 million in a Seed round to build a B2B payments and accounts receivable solution. Similarly, Tapline, based in the UK and serving the DACH/CEE regions, secured €20 million in equity and debt to pre-finance future receivables for B2B SaaS and subscription businesses. Additionally, Factris, a Netherlands/Lithuania-based FinTech, raised €100 million in a facility to support its invoice factoring services aimed at unlocking working capital for SMEs across Europe.

These examples, including Donnerstag.ai’s Seed round, highlight the significant investor interest in automating receivables and improving cash flow for businesses across Europe. The total funding in this sector, based on these announcements, amounts to approximately €127.7 million.

Although Donnerstag.ai’s solution specifically targets supplier receivables in the DACH region, the broader funding landscape suggests that such platforms are gaining traction across multiple European markets, with companies such as Tapline and Factris working in complementary or adjacent niches like receivables pre-financing and invoice factoring.

Donnerstag.ai was founded by Barbaros Özbugutu and Volkan Özkan in 2025, both bringing experience in European FinTech. Özbugutu previously worked as Countrymanager Germany at Klarna and co-founded the payment service provider iyzico, which was acquired by Prosus/Naspers in 2019 a successful exit and reportedly one of the largest FinTech acquisitions in Turkey.

Donnerstag.ai provides an AI-powered accounts receivable management platform designed specifically for suppliers. Its goal is to help companies prevent payment losses and gain full transparency into their outstanding receivables.

The software connects data from ERP, service recording, and banking systems, detects discrepancies in real time, and automatically reconciles thousands of transactions. Its intelligent algorithm identifies inconsistencies, predicts missing line items, and alerts finance teams before revenue is lost.

The company explains that by continuously learning from each customer’s data patterns, the system becomes increasingly precise, transforming reconciliation into a proactive and intelligent financial control layer.

“At a time when artificial intelligence is redefining ERP and financial systems, Donnerstag.ai is creating an entirely new category that has never been technologically addressed before,” said Stefan Klestil, General Partner at Speedinvest. “Barbaros and Volkan combine product expertise, strategic vision, and executional strength in a unique way. We’re proud to lead this round and work with Donnerstag.ai to shape the future of European financial technology.”

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