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Rillet reaches unicorn status with $1B valuation after Series C funding

Rillet, an AI-native accounting startup, has raised $100 million in a Series C funding round at a $1 billion valuation, bringing its total funding to over $200 million. The round was led by ICONIQ with participation from Sequoia Capital, Andreessen Horowitz, Oak HC/FT, and new investors including Bain Capital Ventures, Battery Ventures, FirstMark, Scale Venture Partners, and Creandum. The company, which serves more than 600 customers and doubled its new annual recurring revenue in the three months before the round, positions its AI agents as tools to assist finance professionals, with customers including Neuralink, Skild AI, and Mercor.

read2 min views2 publishedAug 18, 2026
Rillet reaches unicorn status with $1B valuation after Series C funding
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Via aprio.com

The AI-native accounting startup has raised $100M in its third funding round in roughly a year, drawing backing from Sequoia, a16z, and ICONIQ.

AI accounting startup Rillet has raised $100 million in a Series C funding round at a $1 billion valuation, bringing its total funding to more than $200 million.

The round was led by ICONIQ, with participation from existing investors Sequoia Capital, Andreessen Horowitz and Oak HC/FT. New investors included Bain Capital Ventures, Battery Ventures, FirstMark, Scale Venture Partners and Creandum.

The funding marks Rillet’s third capital raise in the past year. The company, founded roughly two years ago, now serves more than 600 customers and said new annual recurring revenue doubled during the three months leading up to the latest round.

Rillet develops an AI native accounting platform designed to automate finance and accounting workflows. CEO and cofounder Nicolas Kopp said the company positions AI as a tool to assist finance professionals rather than replace them.

Customers include Neuralink, Skild AI and Mercor, while about 40% of Rillet’s customer base now comes from industries outside technology and AI.

Mercor is using Rillet’s AI agents to support a business generating more than $2 billion in annual recurring revenue with a finance team of three people, according to the company.

Rillet is positioning its platform as an alternative to legacy enterprise systems from companies including Oracle, SAP, Workday, Microsoft and NetSuite. Its software uses AI agents to automate accounting operations while maintaining financial records and audit trails.

The company also formed an alliance with EY earlier this year focused on AI native finance transformation and said it now works with more than half of the top 20 CPA firms ranked by Accounting Today.

Disclosure: This article was edited by Editorial Team. For more information on how we create and review content, see our

Editorial Policy.

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