Rillet Secures $70M Series B to Scale AI-Driven Accounting Platform

Rillet, an AI-driven enterprise accounting platform, has raised $70 million in Series B funding, co-led by Andreessen Horowitz (a16z) and ICONIQ Capital [1][2]. This brings the company’s total funding to over $100 million in under a year, reflecting strong institutional backing for its mission to modernize financial systems with AI-native automation [1]. The latest round follows a $25 million Series A in May 2025, led by Sequoia Capital, which aimed to bring AI into mid-market accounting [1].

Based in San Francisco, Rillet has seen rapid growth since its launch in 2024. The company has signed over 200 customers and doubled its annual recurring revenue in the past 12 weeks [1]. In addition, it has formed partnerships with top-tier accounting firms such as Armanino and Wiss [1]. With this expansion, Seth Pierrepont of ICONIQ and Alex Rampell of a16z are joining Rillet’s board, adding strategic and operational leadership [1].

Rillet’s platform is designed to streamline and automate enterprise financial operations. For example, PostScript, a $100 million ARR unicorn, uses Rillet to close its books in just three days [1]. Similarly, Windsurf manages its full finance operations with a two-person team, demonstrating the platform’s efficiency and scalability [1]. Alex Rampell, a16z General Partner, emphasized the importance of AI in finance, stating, “Finance teams deserve the same AI advantages that have revolutionized sales, engineering, and legal” [1].

The Series B funding is expected to accelerate Rillet’s mission to replace legacy accounting systems with a next-generation AI-first ERP solution [2]. As the financial technology sector increasingly adopts AI to reduce manual tasks and enhance accuracy, Rillet’s approach aligns with a broader industry shift toward automation and smarter workflows [1].

The company’s success underscores the growing demand for innovative, AI-native solutions in enterprise finance. With a focus on efficiency and scalability, Rillet is well positioned to lead the transformation of traditional financial processes in the AI era [2].

Source:

[1] https://cryptobriefing.com/ai-startup-rillet-70m-funding-a16z/

[2] https://www.globenewswire.com/news-release/2025/08/06/3128328/0/en/Rillet-raises-70M-to-replace-20th-century-accounting-software-with-AI-native-ERP-built-by-accountants.html

[3] https://www.wfla.com/bloom-tampa-bay/bloom-financial-health/rillet-secures-70m-to-expand-ai-accounting-platform/