Rillet Raises $100M Series C at $1B Valuation to Scale AI-Native Accounting Platform

Rillet Raises $100M Series C at $1B Valuation to Scale AI-Native Accounting Platform

AI-native accounting startup Rillet has raised $100 million in Series C funding at a $1 billion valuation, marking its entry into the unicorn club just two years after emerging from stealth.

The round was led by ICONIQ, with participation from returning investors including Andreessen Horowitz and Sequoia. The latest financing brings Rillet's total funding to more than $200 million and represents its third major funding round in roughly one year.

Founded by Nicolas Kopp and Stelios Modes, Rillet is building an AI-native enterprise resource planning platform designed to automate accounting and finance workflows. The company aims to replace legacy accounting systems with software that can continuously process financial data and automate routine work for finance teams.

Rillet's platform connects with systems already used by businesses, including Salesforce, Brex and other financial and operational tools. The platform can continuously pull data from these systems and use AI to automate accounting processes rather than relying on finance teams to manually consolidate information.

The company's rapid growth has attracted significant investor attention. Rillet says it now serves more than 600 companies and has doubled its annual recurring revenue over the past three months.

The latest funding round was reportedly not originally planned. According to co-founder and CEO Nicolas Kopp, investor interest increased sharply following several developments since the company's previous funding round, including its growing customer base, rapid ARR expansion and an alliance with EY.

Rillet announced its alliance with EY in April 2026, combining EY's finance transformation, risk and controls expertise with Rillet's AI-native finance platform. The partnership is aimed at helping organizations modernize their finance functions with real-time and audit-ready systems.

The Series C follows two earlier rounds in quick succession. Rillet raised a $25 million Series A led by Sequoia in May 2025 before securing a $70 million Series B led by Andreessen Horowitz and ICONIQ in August 2025.

The company's latest raise highlights the growing investor appetite for AI-native enterprise software that targets established categories dominated by legacy platforms. In Rillet's case, the company is targeting the accounting and ERP market, where businesses have traditionally relied on systems such as NetSuite and other established enterprise platforms.

Rillet is positioning its product around a different model in which AI is embedded directly into the accounting infrastructure rather than added as a separate layer on top of traditional software. Its platform is designed to automate tasks such as financial data processing, accounting workflows and other repetitive finance operations.

The company now enters its next stage with a $1 billion valuation, a rapidly expanding customer base and more than $200 million in total funding. The challenge will be turning its rapid early growth into a durable position in the highly competitive enterprise accounting and ERP market.