Most finance software still behaves like every company is an island. Causa Prima would like to inform the market that the swamp is actually between the islands, where invoice disputes, payment timing, and early-pay discounts go to die in email threads.

The startup said this week it raised a $20 million seed led by Base10 Partners, with QED Investors and FJ Labs joining, and Creandum, Kfund, and Borusan Ventures putting more chips on the table. Forbes España matched the broad outline, reporting that the new round brings total funding since launch to $30 million and that more than 3,000 companies have joined the network.

The company homepage is basically the thesis in large type: it calls itself the agent-to-agent platform for enterprise finance and promises to let software negotiate invoice terms directly with the other company. That is the important bit. Plenty of fintech startups automate your side of the ledger. Causa Prima is pitching a network where both sides show up with rules, approvals, and enough machine patience to discuss whether paying on day seven for 2% off is worth the trouble. The answer, in its own example, is yes, and also about 32% annualized. Finance people do love a multiple when it arrives disguised as treasury hygiene.

If you squint, this is a seed round for turning accounts payable and receivable into protocol design. Base10's attraction is not hard to parse either. The firm said in June that it had grown assets under management to $2.6 billion, and Causa Prima fits its taste for boring problems with very large line items attached. Not glamorous, darling reader, but neither is a disputed invoice at quarter close.