Causa Prima raises $20M seed from Base10 to let AI agents settle B2B invoices

Causa Prima has picked up a $20 million seed round led by Base10 Partners, pushing its total funding to $30 million in less than four months. QED Investors and FJ Labs joined as new backers, while Creandum, Kfund, and Borusan Ventures added more money. The company did not disclose a valuation.

The pitch is simple enough to say and messy enough to matter: most finance software helps one company track its own books, but the real slog begins when a buyer disputes an invoice and a supplier starts chasing payment. Causa Prima wants AI agents on both sides of that exchange, talking on a shared network, handling disputes, negotiating timing, and working out early-payment discounts without the email swamp.

Maex Ament, the co-founder and chief executive, is betting that this “between companies” layer is where corporate finance is headed. That’s not just theory from a pitch deck. The 2026 Atradius Payment Practices Barometer for North America found late payment affects seven in 10 companies in the region, with overdue invoices averaging 23% of business receivables. The survey covered more than 600 businesses in the United States, Canada, and Mexico.

Causa Prima says more than 3,000 active accounts are already using the network, the same figure it gave in June, and that it is onboarding enterprise customers that are multibillion-dollar businesses. It has 25 employees across Madrid and Munich, and plans to use the new money to expand into the United States, including a New York office, while continuing to build the platform.

There’s a long list of familiar names around this one. Ament previously co-founded Taulia and later Centrifuge, while Henrik Gebbing co-founded Finoa and Philip Stanislaus is the CTO. Base10 is leaning hard into automation around the “real economy,” and its partners clearly like the idea of software that doesn’t stop at the edge of one company’s accounting system.