Causa Prima raises $20M to put AI agents on both sides of every invoice

Causa Prima, a San Francisco-based startup building an agent-to-agent platform for inter-company invoice settlement, has raised a $20M seed round led by Base10 Partners, with participation from QED Investors, FJLabs, Creandum, Kfund and Borusan Ventures. The raise comes just three months after the company emerged from stealth with a $10M pre-seed, bringing total funding to $30M and marking its formal entry into the US enterprise market.

The company was co-founded by Maex Ament, who previously co-founded Taulia, the supply-chain finance platform acquired by SAP that the company says processes $1.2 trillion per year across five million suppliers. Ament also claims credit for inventing dynamic discounting, a mechanism that lets suppliers receive early payment in exchange for a price reduction on the invoice. His co-founders are Henrik Gebbing, who scaled German digital-asset custodian Finoa to €10 billion in assets under management, and Philip Stanislaus, a former enterprise security specialist.

The problem: the seam between two finance teams

The core thesis is straightforward but sharp. As enterprises accelerate the deployment of agentic AI across procurement, accounts payable and accounts receivable, every individual agent still works within the boundary of a single organisation. When a buyer's AI approves an invoice in seconds, it then waits for a human on the supplier's side to respond, often via email. The bottleneck, Causa Prima argues, was never inside either finance team. It sits between them.

Causa Prima's platform places an AI agent on both sides of a transaction simultaneously. The two agents negotiate directly: verifying invoice accuracy, resolving disputes and, critically, agreeing on price. The company says around 80% of available early-payment discounts go uncaptured by large enterprises today, because negotiating invoice-by-invoice at scale is impossible manually. By automating that negotiation, the platform positions itself as a working-capital optimisation layer rather than a simple invoicing tool. The result, the company contends, is also a live cash-position feed: because the same agents settling invoices are reporting on them, a finance team can act on real-time treasury data rather than a bi-weekly spreadsheet.

"I spent years building the software that lets suppliers get paid early," said Ament. "It worked. But the last mile was always a person chasing an approval, matching an invoice or writing another follow-up. We built the part that handles that."

Convergence angle: agentic infrastructure meets global supply chains

The Causa Prima raise sits at the intersection of three forces that Disrupts readers are tracking closely. First, the broader agentic-AI buildout: enterprises are moving from AI as a query tool to AI as an operational decision-maker, and inter-company workflows are the next frontier once intra-company automation saturates. Second, the fragmentation of global supplier networks: the US market Causa Prima is entering runs some of the world's largest and most complex supplier bases, where even marginal improvements in payment velocity translate to billions in unlocked working capital. Third, the underlying infrastructure gap in B2B payments: the company's own figure of $90 trillion in annual business-to-business payment flows, still governed by rules written for paper cheques, points to a structural inefficiency large enough to justify infrastructure-scale ambition.

For investors watching capital flows across the fintech and enterprise-software spectrum, the speed of this round is notable. Base10 general partner Rexhi Dollaku described the decision to follow the pre-seed into a seed after only three months as "matching the pace of a team that's earned the right to move fast," citing the founders' track record of moving over a trillion dollars a year through the system they now intend to replace.

The competitive read-across is significant. Established AP and AR automation players, as well as the broader embedded-finance wave, have focused on automating processes within a single organisation's walls. If agent-to-agent settlement between companies proves out at scale, it reframes the entire accounts-payable software category and puts pressure on ERP vendors including SAP, ironically Ament's former acquirer via Taulia, to respond.