AI-Native Accounting Platform Rillet Reaches $1B Unicorn Valuation

California-based financial software provider Rillet has officially reached unicorn status, closing a $100 million Series C round at a $1 billion valuation to build what it calls the first truly AI-native accounting platform. The round was led by ICONIQ, with participation from returning backers Sequoia Capital, Andreessen Horowitz and Oak HC/FT, plus new investors including Bain Capital Ventures, Sequoia Global Equities, Battery Ventures, FirstMark, Scale Venture Partners and Creandum. ICONIQ general partner Seth Pierrepont is joining Rillet's board.

The two-year-old startup's rise has been remarkably fast. It raised a Series A led by Sequoia last summer, then closed a Series B just weeks later. The latest round marks Rillet's third fundraise in the past year and pushes total funding past $200 million. The company doubled new annual recurring revenue in the last three months and now serves more than 600 customers, including Neuralink, Skild AI and Mercor, alongside a growing share of non-tech businesses across waste recycling, movie studios, biotech, healthcare, logistics and professional services.

Rillet rebuilds the general ledger from the ground up on an "agent-first" basis, rather than layering automation atop legacy systems like NetSuite, SAP, Workday, Oracle Fusion and Microsoft Great Plains. Its AI agents perform hundreds of tasks simultaneously inside a real-time general ledger, with human approval and a complete audit trail. The result: finance teams at companies like Mercor are scaling past $2 billion in ARR with a headcount of just three. One customer generating over $100 million in ARR now finalises its books in three days.

Co-founder and CEO Nicolas Kopp, who previously worked as a bank executive waiting weeks for business metrics from obsolete finance systems, described the mission as freeing CFOs from the drudgery that keeps them chained to spreadsheets on weekends. "Our message is not that we're coming after jobs. We're positioning AI as a helper," Kopp said. ICONIQ's Pierrepont added: "What stands out is how customers actually run on it—multibillion-dollar businesses operating with finance teams a tenth the traditional size, closing their books continuously".

Global unicorn tracking shows private unicorns now total 1,830 companies valued at **$8.41 trillion**. More than half—938—are headquartered in the United States, valued at $5.04 trillion. China ranks second with 310 unicorns valued at $1.51 trillion, followed by India with 89 worth $499 billion. The United Kingdom leads Europe with 80 unicorns, followed by Germany with 47. France (34), Canada (38), Israel (23), Singapore (23) and South Korea (21) round out the top ten.

The latest valuation wave continues to reward domain-specific automation platforms that deliver direct, operational cash flows rather than speculative user engagement—a shift Rillet's rapid ascent exemplifies. As Kopp put it: "In the AI era, the ERP has to become the operating layer for what happens next".