Rillet Raises $70M Series B to Reinvent ERP with AI

Key Takeaways

Andreessen Horowitz (a16z) raised $70.0M (Series B) from Andreessen Horowitz (a16z), Sequoia Capital, ICONIQ.
Sector: Artificial Intelligence (AI), Technology Software & Gaming.
Geography: United States.

Analysis

San Francisco-based Rillet, an AI-native ERP platform transforming how finance teams operate, has raised $70 million in Series B funding. The round was co-led by Andreessen Horowitz and ICONIQ, with participation from Sequoia, Oak HC/FT, and previous investors. This brings Rillet’s total funding to over $100 million in under 12 months.

The company’s mission is to replace outdated enterprise accounting systems with an intelligent, real-time infrastructure. Since its launch, Rillet has signed over 200 customers, doubled ARR in just 12 weeks, and secured strategic partnerships with leading firms like Armanino and Wiss.

Rillet’s platform reimagines the financial tech stack by integrating native data flows directly into its smart general ledger, then applying AI to automate workflows and enable real-time insights. Its approach eliminates reliance on spreadsheets and bolt-on tools, giving finance teams control, speed, and intelligence within one cohesive system.

Customer results are already impressive. Postscript, with over $100M ARR, now closes its books in just three days. Windsurf, a hyper-growth company, manages its entire finance operations with a lean team of only two people.

Unlike legacy platforms like NetSuite, Sage Intacct, and Microsoft Dynamics, which are now controlled by large conglomerates or private equity groups, Rillet is a clean-slate, AI-native alternative designed for modern scale and complexity.

With a leadership team rooted in finance—ex-EY, PwC, and former CFOs—Rillet is built by accountants for accountants, allowing for faster implementation and more intuitive workflows. Many customers report going live in as little as four weeks compared to a year-long rollout in traditional systems.

Similar AI-Native ERP and Accounting Tech Rounds in 2025

Numeric raised $28M Series A in Q1 2025 to expand its AI-powered close automation tools for mid-market firms, led by Menlo Ventures.
Puzzle completed a $30M growth round backed by S32 and XYZ Capital to scale its Stripe-native accounting solution for startups.
Basis secured $34M Series A in December 2024 to build agent-powered accounting intelligence with support from Khosla Ventures and OpenAI-related investors.
Zeni extended its reach after a $34M Series B focused on fully automated bookkeeping and financial reporting for startups and VCs.
FlowFi closed $11M in Series A funding in July 2025 to develop real-time finance co-pilots for e-commerce and SaaS firms.
Hyperbots raised $6.5M to build AI agents for backend finance operations, targeting automation in audits, approvals, and reconciliations.

These investments highlight a clear trend: AI-native financial infrastructure is rapidly becoming foundational for scaling modern businesses across industries.

Rillet’s Series B arrives at a critical moment. With 75% of accountants projected to retire within 15 years and 80% of financial tasks ripe for automation, the company sits at the forefront of a generational shift. Its platform not only reduces the need for large teams but elevates the role of finance into a strategic engine for growth.

Looking forward, Rillet plans to deepen its AI capabilities, build integrations across the fintech stack, and evolve its platform into a collaborative environment where AI agents and human finance experts work side by side.

As several of Rillet’s customers prepare for IPO within the next 6 to 12 months, the company is positioning itself as the essential infrastructure for next-generation public-ready companies.

Rillet isn’t just modernizing accounting—it’s reshaping the operating system of finance itself.