Rillet, an AI-native ERP platform for finance teams, just closed a $100 million Series C led by ICONIQ at a $1 billion valuation. The round includes Sequoia, Andreessen Horowitz, Bain Capital Ventures, and several other name-brand investors. It’s Rillet’s third raise in a year, pushing total funding past $200 million.
You can read our previous reporting on Rillet’s foray into the mid-market ERP channel here:
Pine Launches Raiz as Dedicated Rillet VAR to Accelerate AI-Native ERP Adoption in the Mid-Market
They also have established partnerships with many top accounting firms, including a recently announced alliance with EY.
Rillet isn’t positioning itself as a better accounting tool. It’s positioning the ERP as an “agentic operating layer,” a system where AI agents work directly inside the general ledger alongside finance teams rather than bolted on top of it. CEO Nicolas Kopp frames the shift bluntly: the ERP has spent two decades as a system of record, and in the AI era it needs to become the system that executes work, not just logs it.
That’s a direct challenge to how mid-market ERP has been built for the last generation.
Rillet claims customers running finance functions at a fraction of traditional headcount, citing a company scaling past $2 billion in ARR with a three-person finance team. Whether that generalizes beyond hypergrowth tech and AI companies is an open question, but the company is already pushing into biotech, healthcare, fintech, logistics, and professional services, explicitly targeting displacement of Oracle Fusion, SAP, Workday, and NetSuite.
The NetSuite mention is the one that should get attention in this market. Rillet isn’t just competing with legacy on-prem systems. It’s naming a cloud-native, Oracle-owned platform as a replacement target, and doing so with investor backing that assumes real momentum, not just a good demo.
Implications for the ERP Vendor Landscape
For Acumatica, Sage Intacct, and Business Central, this isn’t an immediate competitive collision. Rillet’s early traction is concentrated in tech and AI-native companies with lean finance teams and high tolerance for new infrastructure. That’s a different buyer than the traditional mid-market manufacturer or distributor these platforms serve.
But the strategic signal is real. Rillet’s alliance with EY and partnerships with top CPA firms show that accounting and advisory firms are willing to co-sign an AI-native alternative to the incumbents they’ve historically recommended. That’s the same channel relationship mid-market ERP vendors have leaned on for trust and distribution. If advisory firms start treating “agentic ERP” as a credible category rather than a novelty, incumbent vendors will need a sharper answer than embedded copilots bolted onto existing workflows.
What It Means for ISVs
The bigger question for the ISV ecosystem is architectural. Rillet’s pitch is vertical integration: structured data flows natively into a real-time ledger, and agents operate with full context inside that ledger rather than through APIs into a static system of record. If that model gains traction, it puts pressure on the current ISV playbook of building point solutions that sit on top of an ERP’s data layer.
ISVs building on Acumatica, NetSuite, or Intacct have generally succeeded by extending functionality the core platform doesn’t offer. An AI-native competitor that treats the ledger itself as the place where work happens, not just where it’s recorded, raises the bar for what “extension” means. It’s less about whether ISVs can still build integrations, and more about whether the platforms they build on are moving fast enough to keep agentic workflows native rather than ceding that ground to challengers like Rillet.
Rillet is still a fraction of the size of the incumbents it’s naming as targets. But a $1 billion valuation, a third funding round in 12 months, and a deliberate strategy of recruiting the accounting establishment as validators are things the ERP market should be keeping a close eye on.
