Rillet Reaches Unicorn Status with $100M Series C at $1 Billion Valuation in AI Accounting Push

Rillet raises $100M Series C at $1B valuation -- 2 years after emerging from stealth

AI accounting startup Rillet announced a $100 million Series C at a $1 billion valuation on Tuesday, led by Iconiq. Returning investors included Andreessen Horowitz and Sequoia. Rillet, which emerged from stealth in 2024, is quickly becoming one of the hottest AI startups in the enterprise resource planning (ERP) industry. The company's software deploys AI to help finance professionals manage a company's books. It says it can, for instance, automatically and continuously pull data from sources like Salesforce or Brex. Rillet touts more than 600 companies as customers and says it has doubled its ARR in the past three months. Nicolas Kopp, the company's co-founder and CEO, said on X that this latest round came together in "less than 48 hours." The company wasn't planning to raise, he said, but interest grew because so much had happened since its last round, like an alliance with EY and the jump in ARR and customers. "A year ago, we backed a bold vision for Rillet: that the general ledger could become more than a system of record and instead the operating system for finance," Seth Pierpont, General Partner, ICONIQ, said in a statement shared with TechCrunch. "That vision is now reality." Rillet last raised a $70 million Series B last year in a round led by ICONIQ and Andreessen Horowitz. Shortly before that round, it announced a $25 million Series A led by Sequoia. The company has raised more than $200 million to date. The rapid growth of AI startups -- and how quickly they can raise large sums -- shows how feverish investors remain about AI, especially regarding those poised to disrupt legacy SaaS players like NetSuite. Though reports of a SaaSpocalypse might be overplayed, smoke indeed hints at a fire.

Rillet raises $100mn at a $1bn valuation

Rillet has raised $100mn at a $1bn valuation, led by ICONIQ, for an AI-native accounting platform that runs agents inside a company's general ledger. It is the two-year-old startup's third raise in 14 months. Customers such as Mercor run past $2bn in revenue with a finance team of three, and Rillet is going after Oracle, SAP and NetSuite. Rillet, a startup that rebuilds corporate accounting around AI, has raised $100mn at a $1bn valuation, making it the latest AI unicorn. ICONIQ led the Series C, the company told Fortune in an exclusive. Nick Lichtenberg reported the deal. It is Rillet's third raise in 14 months. The backers are a roll-call of AI investors. Returning shareholders Sequoia, Andreessen Horowitz and Oak HC/FT joined, Rillet said. New investors include Bain Capital Ventures, Battery Ventures, FirstMark, Scale Venture Partners and Creandum. The round takes total funding past $200mn, and ICONIQ general partner Seth Pierrepont is joining the board. Rebuilding the general ledger Rillet sells what it calls an AI-native ERP, the enterprise software that runs a company's finances. Nicolas Kopp and Stelios Modes founded it in 2021, and it launched publicly in August 2024, Tech Funding News reported. Modes, the chief technology officer, previously ran the German neobank N26 in the US. The company says it ended its first year with 100 customers, then raised its Series A and B just ten weeks apart. The pitch takes aim at the incumbents. Kopp argues that legacy systems from Oracle, SAP, Workday, Microsoft and NetSuite belong to a pre-AI era. They were built for humans to key in and check data, he says. Rillet calls itself "agent-first" instead. Its AI agents run hundreds of operations at once inside a real-time general ledger. Accountants review the work rather than enter it by hand. Kopp framed the shift in stark terms. "For the last two decades, the ERP has been treated as a system of record, a place to store what already happened," he said. "In the AI era, it has to become the operating layer for what happens next." Finance agents "need to work inside the general ledger," he said, not just draw data from it. Fast growth, and a marquee customer The numbers behind the raise are steep. Rillet doubled its new annual recurring revenue in the three months before the round. It now serves more than 600 customers, the company said. Agent activity across those customers is growing about 70 percent month on month, Kopp wrote. They include the AI firms Neuralink, Skild AI and Mercor, alongside public companies. About 40 percent now sit outside tech, in industries from waste recycling to film studios, Kopp told Fortune. One customer does the heavy lifting in the sales pitch. Mercor uses Rillet's agents to run a business scaling past $2bn in annual recurring revenue with a finance team of just three, according to the company. Pierrepont made the same point in the funding announcement. Customers are "multibillion-dollar businesses operating with finance teams a tenth the traditional size, closing their books continuously," he said. Kopp was careful about what that means for jobs. "Our message is not that we're coming after jobs. That's just not correct," he told Fortune, stressing that accounting expertise is core to the product. He said the aim is to free finance chiefs from spreadsheet drudgery. "CFOs really struggle day to day. They can't see their families on weekends," he said. That message sits alongside a blunter one. "We believe in lean, impactful finance teams," Kopp wrote. He argues that controllers will spend less time reconciling and more on strategy. The two claims, fewer people and no lost jobs, are left for readers to weigh. An old category, moving fast Kopp credits recent model improvements for the pace. Accounting is "traditionally a very old, stodgy category," he told Fortune, but tasks that once took a person a day now take minutes. "Especially in the last six months, things started lighting on fire in a good way," he said. He also casts a shrinking accounting workforce as an opening. The US has 340,000 fewer accountants than it did five years ago, Kopp wrote. He argues AI agents can help cover that gap. People are not leaving because AI threatens the job, he said, but because the work is drudgery. Rillet has paired the sales push with establishment credibility. It launched an alliance with EY earlier this year. It also says it now partners with more than half of the Accounting Today top 20 CPA firms, along with KPMG and RSM, Tech Funding News reported. That matters for a product asking large companies to trust it with their books. A crowded, cautious market Rillet is not the only startup chasing this shift. Campfire, founded in 2023, has raised about $100mn from Accel and Ribbit and bills itself as a modern NetSuite, Tech Funding News reported. Others, such as Puzzle and Digits, target simpler bookkeeping for smaller firms. Rillet says it aims at more complex customers, including public companies. The Information has described a broader trend of "QuickBooks challengers" fetching billion-dollar valuations. The prize is large. The global ERP software market was worth $92.6bn in 2025 and is growing at about 13 percent a year, Tech Funding News reported, citing Fortune Business Insights. Rillet's raise is a bet that AI can prise open a category the legacy giants have held for decades. Whether it works is not settled. Finance departments are slow to change, and it is not yet clear whether this wave of startups will displace the incumbents or simply grow before becoming incumbents themselves, Tech Funding News noted. Rillet joins a run of fast AI raises, from EliseAI to Higgsfield and Wispr, each promising to unseat an entrenched way of working. It also lands amid smaller enterprise-AI bets such as Prevalent AI. For now, Rillet has the money and the customers to make its case.

Rillet Raises $100M Series C at $1B Valuation to Build Accounting Superintelligence

ICONIQ leads the round with participation from existing investors Sequoia and Andreessen Horowitz -- the company's third raise in one year. SAN FRANCISCO--(BUSINESS WIRE)--August 19, 2026-- Rillet, the AI-native ERP (enterprise resource planning) platform for modern finance teams, today announced a $100 million Series C led by ICONIQ at a $1 billion valuation, with participation from Sequoia, Andreessen Horowitz, Sequoia Global Equities, Bain Capital Ventures, Oak HC/FT, Battery Ventures, FirstMark, Scale Venture Partners, and Creandum. The round is Rillet's third in the last year and brings total funding to more than $200 million. The raise follows a period of rapid growth for the company. Rillet doubled new ARR in the last three months and now serves more than 600 customers, including publicly listed enterprises and the fastest growing AI companies of all time. After proving its platform for tech and AI companies, Rillet is rapidly expanding into new verticals including biotech, healthcare, fintech, logistics, professional services and more where large legacy enterprises are replacing Oracle Fusion, SAP, Workday, Microsoft Great Plains, and NetSuite to run their accounting on Rillet. The investment accelerates Rillet's mission to build the agentic operating layer for finance: the platform where finance professionals and AI agents work together to run the financial operations of a company. With Rillet, the ERP becomes the harness for the modern finance organization, where people and agents share the same financial data, apply the same accounting policies and controls, and work from a single, continuously updated view of the business. Agents perform increasingly complex financial work, while finance teams retain visibility, approval authority and a complete audit trail. Rillet is creating an entirely new category of finance infrastructure. Legacy ERPs store transactions while the real work happens in spreadsheets and bolt-on tools, and the newest wave of AI products repeats that pattern by layering agents on top of systems that were never designed for them. Rillet vertically integrates the stack: structured data flows through native integrations into a real-time general ledger, and AI agents operate directly in that ledger with full context, a complete audit trail, and human approval where necessary. "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," said Nicolas Kopp, CEO and co-founder of Rillet. "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." Rillet's customers show what that shift looks like in practice. Finance teams at companies like Mercor are working hand in hand with Rillet's AI agents to scale past $2 billion in ARR with a team of three. "In our view, Rillet is the clear market leader in AI-native accounting infrastructure," said Seth Pierrepont, General Partner at ICONIQ and new Rillet board member. "What stands out to us is how customers actually run on it -- multi-billion-dollar businesses operating with finance teams a tenth the traditional size, closing their books continuously. We believe Rillet is the foundational infrastructure for the next generation of enterprises in the AI era, and we are proud to deepen our partnership." Rillet has been intentional about building this new category of finance with the accounting firms that audit and advise the world's largest companies. Rillet and Ernst & Young launched an alliance for finance transformation earlier in 2026 and the company is an official partner with more than half of the Accounting Today top 20 CPA firms. "In 2-3 years, every company will run finance this way - agentic and in real-time," Kopp concluded. "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." About Rillet Rillet is the AI-native ERP built for the era of agentic finance. By combining a real-time general ledger, continuous close architecture and AI agents in one system, Rillet enables humans and agents to run finance together with full context, controls and auditability. Public companies and fast-growing enterprises including Mercor, Function Health, and Temporal run on Rillet. Rillet works with the top accounting firms and launched an alliance with EY in 2026. Learn more at rillet.com. View source version on businesswire.com: https://www.businesswire.com/news/home/20260819978953/en/

Exclusive: Accounting AI startup Rillet reaches unicorn status with $1 billion valuation. Its founder says he wants to give CFOs back their weekends | Fortune

Rillet, a two-year-old startup building what it calls the first truly AI-native accounting platform, has raised a $100 million Series C at a $1 billion valuation, the company told Fortune exclusively -- joining the ranks of AI-era unicorns racing to unseat decades-old enterprise software giants. The round, led by ICONIQ with participation from returning backers Sequoia Capital, Andreessen Horowitz and Oak HC/FT, plus new investors including Bain Capital Ventures, Battery Ventures, FirstMark, Scale Venture Partners and Creandum, marks Rillet's third fundraise in the past year and pushes its total funding past $200 million. ICONIQ general partner Seth Pierrepont remains on Rillet's board. For Rillet co-founder and CEO Nicolas Kopp, the milestone is as much personal as financial. In an interview with Fortune, Kopp described the company's mission as freeing CFOs from the drudgery that keeps them chained to spreadsheets long after everyone else has logged off. "CFOs really struggle day to day. They can't see their families on weekends," Kopp said, because they have to spend so much time reviewing data and creating slideshows. Noting that he has a finance and accounting background himself and that his company is full of people with accounting backgrounds, he said he wants AI to change that -- not by replacing finance professionals, but by acting as their tireless back office. "Our message is not that we're coming after jobs. That's just not correct," he said, stressing that "domain expertise" is core the company's mission: "We're positioning AI as a helper to that individual and what they can achieve." From launch to unicorn in two years Rillet's rise has been fast even by startup standards. Kopp said the company launched publicly roughly two years ago, raised a Series A led by Sequoia last summer, then closed a Series B just weeks later -- a round that saw new annual recurring revenue double quarter over quarter. The company says it doubled its new ARR again in the three months leading into this latest raise, and now serves more than 600 customers. Those customers include some of the fastest-growing AI companies in the world -- Neuralink, Skild AI and Mercor among them -- alongside a growing share of decidedly non-tech businesses. Roughly 40% of Rillet's customer base now sits outside the tech and AI sectors, Kopp said, spanning industries as varied as waste recycling and movie studios, describing the shift as evidence that AI-native finance tools are crossing into the broader U.S. economy. "That's been really cool to see," he said. Mercor, in particular, has become a marquee reference customer: According to the company, its finance team is using Rillet's AI agents to manage a business scaling past $2 billion in annual recurring revenue with a headcount of just three. "Rillet is the clear leader in AI-native accounting infrastructure," Pierrepont said in a press release announcing the fundraise. "What stands out is how customers actually run on it -- multibillion-dollar businesses operating with finance teams a tenth the traditional size, closing their books continuously." Taking on the legacy giants Rillet's pitch to the market is direct: Legacy enterprise resource planning systems -- Oracle Fusion, SAP, Workday, Microsoft's Great Plains and NetSuite among them -- were built for a pre-AI era, and are increasingly vulnerable to a challenger built from scratch around artificial intelligence. "Some of these giants that seemed untouchable" are now facing serious disruption, Kopp said, describing a wave of enterprise customers ripping out legacy systems in favor of Rillet's platform. The core distinction Kopp draws is architectural. Traditional ERP systems, he said, were designed for humans to input and review data -- a workflow that leaves finance chiefs "dragged down into the day-to-day minutiae of numbers" instead of focusing on strategy. Rillet, by contrast, is built "agent-first," with AI systems capable of running hundreds of operations in parallel, executing much of the manual accounting work that traditionally consumed finance teams' time. That shift, Kopp argues, doesn't just save time: it produces cleaner, more consistent financial data than human-run processes typically allow, while creating what he calls a complete audit trail. "Proving out the work layer is mission-critical for enterprise readiness," Kopp said, arguing that Rillet is the only system that can combine deterministic accounting data with AI agents completing complex, end-to-end work in the market today. Rillet has paired that pitch with credibility-building moves in the accounting establishment. Earlier this year, the company launched an alliance with EY for AI-native finance transformation, and it says it now partners with more than half of the Accounting Today top 20 CPA firms. The AI acceleration Kopp traces much of Rillet's recent momentum to rapid improvements in underlying AI models. Accounting, he noted, is "traditionally a very old, stodgy category" -- one where AI has emerged as an unexpected catalyst. "Especially in the last six months, things started lighting on fire in a good way," he said, describing tasks that once took a human a full day now taking a couple of minutes. This frees up time not for job loss, but for higher-level strategic work, he added. That acceleration comes as the accounting profession faces a separate, slower-moving crisis: fewer graduates entering finance and accounting careers. Kopp sees that talent gap as part of the opportunity. He argued that AI agents can help make up for a shrinking pipeline of human accountants even as business complexity -- from pricing changes to competitive pressure -- continues to increase. Rillet's own product development has sped up in step with its AI capabilities, according to Kopp. He pointed to instances where the company's customer support team (many of them with accounting training) has shipped feature requests within two to three hours of a customer raising them, as engineers increasingly build tools in direct collaboration with the company's in-house accountants. "That wasn't possible six to 12 months ago." For this story, Fortune journalists used generative AI as a research tool. An editor verified the accuracy of the information before publishing.