- Rillet’s $100 million Series C was led by ICONIQ at a $1 billion valuation, bringing total funding above $200 million. [1] - The company says it has more than 600 customers and doubled new ARR in the last three months, but has not disclosed an absolute ARR figure. [2] - Rillet says the funding will support AI agents operating inside a real-time general ledger, with human approvals and audit trails.
[1] Rillet has raised $100 million in Series C funding at a $1 billion valuation, making the two-year-old AI accounting startup a unicorn. ICONIQ led the round, which included returning investors Sequoia and Andreessen Horowitz alongside Bain Capital Ventures, Oak HC/FT, Battery Ventures, FirstMark, Scale Venture Partners and Creandum. The financing brings Rillet’s total funding above $200 million. [1]
The company announced the round on August 17, 2026, and TechCrunch reported it on August 19. Rillet emerged from stealth in 2024. [1][2]
Growth without an absolute ARR figure #
Rillet says it now serves more than 600 customers, including Mercor, Function Health and Temporal, and that it doubled new ARR over the past three months. The company has not disclosed its ARR in dollars, so the growth claim cannot be translated into a current revenue run rate from the information released. [1][2]
The company’s prior disclosed fundraises were a $25 million Series A and a $70 million Series B announced in August 2025. [2][3]
A direct pitch against legacy ERP systems #
Rillet’s product combines a real-time general ledger, native integrations and AI agents that automate finance work while retaining human approval and an audit trail. TechCrunch reported that the platform can continuously pull data from tools including Salesforce and Brex. [1][2]
Rillet says customers are replacing Oracle Fusion, SAP, Workday, Microsoft Great Plains and NetSuite with its system. That is the company’s competitive positioning; it did not disclose customer-by-customer replacement figures or a detailed breakdown of how the new capital will be spent. [1]
Companies mentioned #
Further sources #
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