Rillet, the AI-native ERP (enterprise resource planning) platform built for modern finance teams, has closed a $100m Series C round that values the business at $1bn.
The round was led by ICONIQ, with participation from Sequoia, Andreessen Horowitz, Sequoia Global Equities, Bain Capital Ventures, Oak HC/FT, Battery Ventures, FirstMark, Scale Venture Partners and Creandum. It marks Rillet’s third raise in the past year and takes total funding secured by the company beyond $200m.
The capital injection follows a stretch of rapid growth. Rillet has doubled new annual recurring revenue in the last three months alone and now counts more than 600 customers, spanning publicly listed enterprises and some of the fastest growing AI companies to date.
Having established its platform among tech and AI clients, Rillet is now pushing into fresh verticals, among them biotech, healthcare, FinTech, logistics and professional services, where large incumbents are swapping out Oracle Fusion, SAP, Workday, Microsoft Great Plains and NetSuite in favour of Rillet’s accounting infrastructure.
The fresh funding will support Rillet’s ambition to build what it calls the agentic operating layer for finance, a single environment where finance professionals and AI agents jointly manage a company’s financial operations. Under this model, people and agents draw on the same financial data, follow identical accounting policies and controls, and work from one continuously updated picture of the business.
Agents are able to take on increasingly complex financial tasks, while human teams retain oversight, sign-off authority and a full audit trail.
Rillet argues it is carving out an entirely new category of finance infrastructure. Where legacy ERPs merely log transactions, leaving the substantive work to spreadsheets and add-on tools, and newer AI products often bolt agents onto systems ill-suited to support them, Rillet has vertically integrated its stack.
Structured data feeds through native integrations into a real-time general ledger, with AI agents operating directly inside that ledger, backed by full context, complete audit trails and human sign-off where required.
Among its customers, finance teams at Mercor are using Rillet’s AI agents to help scale the business past $2bn in annual recurring revenue with a finance function of just three people.
Rillet has also worked to embed itself with the accounting firms that audit and advise the world’s largest companies. It launched a finance transformation alliance with Ernst & Young earlier in 2026 and is now an official partner to more than half of the Accounting Today top 20 CPA firms.
Rillet CEO and co-founder Nicolas Kopp said, “For the last two decades, the ERP has been treated as a system of record, a place to store what already happened. In the AI era, it has to become the operating layer for what happens next. Finance agents need more than access to data; they need to work inside the general ledger.” He added, “Rillet is building that harness: one environment where humans and agents share the same financial truth, divide the work and keep every action auditable. The result is a finance function that can operate 24/7 and in real time.”
Kopp concluded, “In 2-3 years, every company will run finance this way – agentic and in real-time. We’re building the system of context and harness that will take them there and redefine what’s possible for the finance team of the future.”
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