Rillet, a two-year-old startup building what it describes as the first truly AI-native accounting platform, has joined the ranks of AI-era unicorns. The company exclusively told Fortune it raised a $100 million Series C at a $1 billion valuation, marking its third successful fundraise within a single year.
Giving CFOs Their Weekends Back
Founder and CEO Nicolas Kopp, who has a background in finance and accounting, frames the company’s mission as a way to alleviate the heavy workload of finance chiefs. “CFOs really struggle day to day. They can’t see their families on weekends,” Kopp said, noting that the platform is designed to act as a tireless back office rather than a replacement for human expertise.
The round was led by ICONIQ, with participation from major players including Sequoia Capital, Andreessen Horowitz, and Bain Capital Ventures. Total funding for the startup now exceeds $200 million.
Disrupting Legacy ERP Giants
Rillet’s value proposition is a direct challenge to established Enterprise Resource Planning (ERP) systems like Oracle, SAP, and NetSuite. Kopp argues that these legacy tools were built for human data entry, whereas Rillet is "agent-first." This architecture allows AI systems to run hundreds of operations in parallel, executing manual accounting work that traditionally consumed entire finance teams.
The efficiency gains are significant. For instance, the startup Mercor uses Rillet’s AI agents to manage a business scaling past $2 billion in annual recurring revenue with a headcount of just three people. Currently, Rillet serves over 600 customers, with 40% of its base now coming from non-tech sectors such as movie studios and waste recycling firms.
Kopp also points to a broader trend: a shrinking pipeline of accounting graduates. He believes AI agents are becoming essential to fill this talent gap as business complexity continues to rise globally.
