Causa Prima raises $20M seed for AI agents that settle B2B invoices
Three months after a $10M pre-seed, Munich's Causa Prima has raised $20M from Base10 Partners to put AI agents on both sides of the B2B invoice - and to open in New York.
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Munich, Germany
Causa Prima has raised a $20M seed led by Base10 Partners, with QED Investors and FJ Labs joining and Creandum, Kfund and Borusan Ventures following on, to put AI agents in charge of B2B invoice approvals, disputes and payments.
Three months. That is the gap between the Munich company’s $10M pre-seed in June and this round, announced on 13 October 2026. European seed rounds rarely move that fast, and when one does it is worth asking what the investors saw. Below, I lay out the round, the team behind it, and the market maths that explain the hurry.
A $20M seed three months after the pre-seed
Base10 Partners, the San Francisco firm behind Nubank and Brex, led the round. QED Investors and FJ Labs came in as new backers, and existing investors Creandum, Kfund and Borusan Ventures all followed on. Total raised since June: $30M.
The money has a clear destination: the United States. Causa Prima says it will open a New York office and keep building out its platform, where the company reports more than 3,000 active accounts and multibillion-dollar enterprises in onboarding.
Base10 general partner Rexhi Dollaku framed the bet plainly: “Causa Prima is building for the handoff between companies.” A fund committing again within a quarter of the last round is about the strongest signal a seed-stage cap table can carry.
Taulia’s co-founder takes another run at the invoice
Causa Prima builds an autonomous finance network in which AI agents represent both sides of a B2B transaction: one agent for the buyer, one for the supplier. The agents approve invoices, resolve disputes, time payments and negotiate early-payment discounts, so finance teams see cash flow they can actually predict.
The team has lived this problem before. CEO Maex Ament started as a software engineer at SAP and co-founded Taulia in 2009; SAP took a majority stake in that company in 2022, and Causa Prima credits Ament with inventing dynamic discounting. Co-founder Henrik Gebbing built Finoa, the Berlin digital-asset custodian, after three years at McKinsey. CTO Philip Stanislaus ran engineering under Ament at Centrifuge and led more than 600 security audits at Oak Security.
“The biggest inefficiency in corporate finance is no longer inside the company,” Ament said in the announcement. A decade of AP and AR software fixed the inside; the handoff between companies is still where invoices go to age.
A $1.3 trillion market that still pays late
The segment Causa Prima sells into is enormous and slow-moving at once. Global B2B payments were worth $1,273bn in 2025 and are forecast to reach $2,274bn by 2034, a 6.7% CAGR over 2026-2034 (IMARC Group, December 2025). Growth like that does not come from new spending; it comes from paper, cheques and manual bank transfers finally digitising.
The pain is measured elsewhere. Atradius’s 2026 payment-practices survey of more than 600 businesses across the US, Canada and Mexico found late payment affecting seven in ten companies, with overdue invoices averaging 23% of receivables. That is the working capital Causa Prima’s agents are supposed to free.
For scale among our own records: Finmid raised a €17M Series A extension earlier this month to take embedded lending into vehicles, and TrueLayer added $27M for its Italian payments push. The European B2B money-movement stack is raising at every layer this October; $20M at seed sits at the very top of that range.
American cheques at a Munich seed table
So why does a Munich company need a New York office before its Series A? Because the first market for agentic finance is wherever the invoices hurt most, and the Atradius numbers say that is North America. We have seen the pattern before: European founders build the infrastructure, US capital arrives early to point it at US customers. Base10, QED and FJ Labs on one cap table is three American fintech specialists agreeing that a payments layer of the agent era may well be built in Bavaria.
The good news is the direction of travel. American funds used to wait for European fintechs to show Series B metrics; now three of them are underwriting a Munich seed. Repeat founders with domain scars are collapsing the diligence cycle – Ament has been selling into exactly these finance teams since 2009.
What to watch is density. A network where agents negotiate on both sides only works once enough buyers and suppliers sit on it, and 3,000 accounts is a start, not a moat. The number that will decide the Series A is how many CFOs let an agent commit real money without a human in the loop. Watch that number – and watch how many European finance stacks quietly plug in. The fundraising data will tell us first.
