Rillet, an AI-native accounting and ERP platform, raised a $100 million Series C at a $1 billion valuation, according to the company’s own announcement. ICONIQ led the round, with Sequoia, Andreessen Horowitz, Bain Capital Ventures, Oak HC/FT, Battery Ventures, FirstMark, Scale Venture Partners, and Creandum also participating. It’s Rillet’s third funding round in 14 months, pushing its total funding past $200 million.
What Rillet does
Rillet rebuilds the general ledger as a real-time system that finance staff and AI agents work in together, with approval controls and a full audit trail on every entry. The platform automates general-ledger postings, accounts receivable and payable, bank reconciliation, close management, and financial reporting.
“For the last two decades, the ERP has been treated as a system of record,” said Rillet CEO and co-founder Nicolas Kopp. “In the AI era, it has to become the operating layer for what happens next.”
The growth numbers
Rillet says it now serves more than 600 customers, including publicly listed companies and major AI firms, and that new annual recurring revenue doubled over the past three months. One customer Rillet points to, AI recruiting company Mercor, runs a three-person finance team managing more than $2 billion in ARR on Rillet’s platform.
Why it matters
A doubling of new ARR in a single quarter is a genuinely fast growth rate even by AI-startup standards, and it’s likely a big part of why ICONIQ and returning investors were willing to price a third round in barely over a year at a full unicorn valuation. That said, the figure Rillet shared is new ARR growth, not total revenue, so it says more about acceleration than about the company’s absolute scale.
The bigger bet embedded in Rillet’s pitch, that AI agents should operate inside the ledger rather than just summarize reports pulled from it, is the same wager a wave of “AI-native” enterprise software startups are making across categories right now, from Wispr Flow’s voice-to-text agents to Etched’s inference-chip bet. Whether finance teams trust agents with write access to the books at scale, not just read access, is the real test still ahead, regardless of how fast the funding rounds come.
What to watch: whether Rillet’s ARR growth rate holds once the initial wave of AI-native early adopters is fully onboarded, and how competing ERP incumbents respond to a startup explicitly positioning itself against the “system of record” model they still run on.
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