Causa Prima Bets $20 Million on the Invoice Handoff

Causa Prima raised $20 million in seed funding led by Base10 Partners, a round the company closed in September and announced on October 13.

QED Investors and FJ Labs joined, and Creandum, Kfund and Borusan Ventures came back in, taking total capital to $30 million. The product is a pair of AI agents, one for the buyer and one for the supplier, that settle invoices, disputes and early-pay discounts between companies. Maex Ament, the chief executive, already built the one-sided version of that idea at Taulia, which SAP bought in 2022. This check is for the handoff that software never reached.

Base10’s Second Check Lands in September

Causa Prima is Delaware-registered, with offices in Madrid and Munich, and it did not disclose a valuation. Dealroom, which tracks startup funding, put the $20 million among the top 1% by size of 155 comparable German fintech seed rounds over the trailing 48 months. Wilson Sonsini Goodrich & Rosati advised the company on the round.

Creandum had led the $10 million pre-seed on June 16, with Kfund, HelloWorld, Angel Invest and more than 50 founders and executives from firms including Qonto, Pennylane, SAP, ING, SoFi, Lidl and Google DeepMind. Ament called that the largest pre-seed ever raised by a company in Spain. Base10 is the new lead. Rexhi Dollaku, a general partner at the firm, framed the follow-on as a bet on where automation money is still going to the wrong layer.

Every dollar going into AP and AR automation today assumes the bottleneck sits inside one company. Causa Prima is building for the handoff between companies. Following the pre-seed into this round three months later reflects both the size of that problem and the pace at which the team is building.

Rexhi Dollaku, general partner, Base10 Partners

Ament posted the news himself, with a short film and a line that the company’s money man has never been busier.

We raised a $20M seed led by @Base10 and are ready to take @causaprimaai further. Our money man has never been busier! pic.twitter.com/m6aAdOxE0A

— Maex 🦁 (@maex242) October 13, 2026

THE TWO CHECKS IN 2026

The seed money is earmarked for a United States push, including a New York office, and for more work on the agent network. Arne Halleraker, a partner at FJ Labs, called the fit between Ament and this market the reason to write the check, after decades in payments and a sale of Taulia back to SAP.

The Founder Who Already Sold This Problem to SAP

Ament has spent 25 years in accounts payable. He started at SAP, left in 2000, and sold an automated invoicing business in 2005 that he said had more than 600 clients, including Apple, Intel, Siemens and Aldi. He then raised $250 million to build Taulia, the working-capital platform where he invented dynamic discounting at Taulia, a way for a buyer to pay a supplier early in exchange for a lower bill.

On the company’s own about page he is credited with moving $50 billion a year across five million suppliers. He left Taulia in 2018. SAP announced on January 27, 2022, that it would take a majority stake, and the deal closed in March 2022. At that point Taulia said it processes more than $500 billion each year and named Airbus, AstraZeneca and Nissan among customers. SAP did not disclose the price. J.P. Morgan kept a minority stake and a funding alliance.

Causa Prima is Ament’s sixth company. He has also worked on Centrifuge and on angel investing. Henrik Gebbing, co-founder and chief operating officer, built digital-asset custodian Finoa to $10 billion in assets under custody and previously worked at McKinsey. Philip Stanislaus, co-founder and chief technology officer, led more than 600 enterprise security audits at Oak Security. Ament’s line on the three of them is that they have built ten companies and raised $400 million, and that every tool he ever shipped stopped the moment the other company had to pick up the phone.

Taulia already sat between buyers and suppliers, with banks in the middle, and still left the chase in inboxes. Dynamic discounting only fires when someone on each side agrees on a rate and a date. That agreement is the work Causa Prima now wants agents to do, at a volume no AP clerk will touch.

AI Will Multiply the Friday Invoice Chase

The company’s about page does not sell a cleaner dashboard. It starts at 4:45 p.m. on a Friday, with one firm hunting an approval and the other hunting the cash.

It’s 4:45 PM on a Friday. One company is chasing an approval. The other is chasing the payment. AI won’t make this simpler. It will multiply it. Tools for one side won’t end the chase. So we built agents for both.

Causa Prima, company manifesto

Ament has been making the same point in interviews. Finance teams are already deploying agents on procurement, invoicing and payments, and he argues the volume moving between companies is about to jump by 10 times or 100 times. An agent that only works inside one firm still dumps the exception on a person at the other firm. If that person is out, the invoice sits.

He has a name for that person. The approval is stuck in Dave’s inbox, and Dave is at a conference in Las Vegas. Agent-to-human, he said, does not close the loop, because the other side still knocks off at 5 p.m. The architecture he wants is agent-to-agent, with the CFO setting the rails: a floor on terms, a cap on discounts, no negotiations on payroll day.

Fortune Business Insights puts payments between businesses at about $98 trillion a year. That figure is the pool. The product only earns if two agents can meet inside it. Spend on AP and AR software has gone into matching, coding and approval inside one ledger. The second-order effect of that spend, and of the agents now sitting on top of it, is more messages across the gap, not fewer.

What the Agents Do With a Disputed Bill

Causa Prima puts the buyer and the supplier on one network and gives each a digital worker. Finance teams keep control of the decisions that matter. The agents do the chasing. Ament said a dispute that used to take three weeks of email can resolve in seconds because there is no inbox in the middle. Net-30, in his view, is a habit, not an optimum. The agents are meant to retune payment timing when one side has idle cash and the other has a payroll date.

WHAT THE AGENTS HANDLE

• Invoice disputes: A $200 fight can freeze a $200,000 bill for weeks, and the agents are built to reconcile the gap without a human thread.
• Early-pay discounts: The buyer’s agent offers cash sooner; the supplier’s agent accepts a cut; Causa Prima takes a fee when that deal lands.
• Payment timing: Terms locked in an annual contract stay put even when cash needs change, and the agents reopen that timing invoice by invoice.
• The long tail: Ament said most AP teams only chase about 20% of invoices, because a person will not haggle 3 cents on a $3 bill, while an agent has no such cutoff.

The commercial model follows Taulia’s old logic more than a seat license. Causa Prima earns a cut each time its agents lock an early payment. If the buyer cannot free the cash, the June interviews described a later path into third-party finance, which the seed announcement did not detail. The system is meant to sit beside the ERP rather than replace it, which is how Ament said he plans to avoid the “rip out the stack” death of enterprise rollouts.

Onboarding, he said, usually starts with a large buyer that invites its supply chain. Each side is supposed to get value alone, and each new company is supposed to make the network more useful for the ones already on it. That is the marketplace bet FJ Labs is built to like, and it is also the point of failure if the invite is ignored.

Seven in Ten US Firms Still Get Paid Late

The US is the market the new office is meant to open, and it is not a clean one. Atradius, the trade-credit insurer, published its 2026 US payment-practices barometer in September. US firms still conduct 45% of B2B sales on credit. About seven in ten companies still face late payments. In the US, late payments affect 22% of B2B receivables.

THE US LATE-PAY PICTURE

• Credit share: US businesses conduct 45% of B2B sales on deferred terms, with the rest paid up front.
• How wide: About seven in ten US companies still face late B2B payments.
• How deep: Overdue invoices make up 22% of US B2B receivables on average.
• Why they wait: 55% of US suppliers say customers delay invoices, mostly because those customers are short on cash.

Most of those late bills still clear within one month past due, Atradius found, so cash from a sale typically arrives about two months after invoicing. US firms often write off 1% to 2% of B2B invoices as bad debt. Slow internal approvals are on the list of delay causes, alongside goods not matching the order and glitches in online payment systems. Silvia Ungaro, senior advisor at Atradius, has pointed to customer liquidity as the main pressure, not a sudden collapse in collections.

Inside the paying company, the clock is still slow. Ardent Partners’ State of ePayables 2025, which surveyed AP professionals, found that 49% of AP executives named the time it takes to approve invoices and payments as their top challenge. The average invoice took 8.2 days from receipt to approval and cost $9.84 to process, with an 18.4% exception rate. Almost half of those executives also flagged a high share of exceptions. That is the intra-company half of the mess. Causa Prima is selling the half that starts when the exception needs a reply from someone who does not work there.

Both Sides Have to Join Before the Network Pays

A two-sided agent network only beats email if the other company is on it. If it is not, the bot still lands in the same inbox. That is the test the product has not yet publicly cleared with hard volume, named logos, or a rising account count.

WHAT WE KNOW

• Headcount: The company has 25 employees in Madrid and Munich and plans to open in New York.
• Accounts: It cites more than 3,000 active accounts across its networks, the same public figure it used when it left stealth in June.
• Enterprises: It says it is onboarding multi-billion-dollar customers, without naming them or giving transaction volume.
• Fees: It takes a cut when agents negotiate an early payment, so revenue tracks cash-rich buyers as much as software seats.

WHAT IS UNCONFIRMED

• Valuation: The company declined to disclose what the seed was raised at.
• Throughput: No invoice count, dollar volume, or revenue figure has been published with the round.
• Named customers: The multi-billion-dollar logos have not been identified in the announcement.
• Network density: It is not public how many of those 3,000-plus accounts are buyers, suppliers, or both on the same invoices.

The unchanged account figure is the honest read on pace. Ament’s own benchmark is that the best AP teams run 3.3 people per $1 billion in revenue and the worst run 14.4, and he wants customers in the first group. That is a claim about time saved, not about a proven two-sided graph. CFOs, he said, do not fear the agent so much as they fear signing something they cannot explain to a board, which is why the product starts on the long tail and keeps a human on the approve button at first.

Madrid and Munich Hire for a New York Push

The 25-person team works in person between Madrid, the main hub, and Munich. The seed is the cash to put people in New York and to keep building the agents. Ament’s pitch to operators is that they will notice silence first: fewer reminder emails, disputes that come back closed, hours returned to deciding which suppliers to pay early.

He is still solving the problem he started with in 2000. Taulia took a cut of prepaid invoices and grew into SAP’s working-capital stack, and the Friday chase survived it. The $20 million does not buy a new ERP. It buys a shot at being the layer both agents call when one company owes the other, before the next wave of internal bots makes that call a hundred times louder.