Rillet today announced its expansion into the UK, with a new office in central London and its UK team already on the ground. European demand already drives 10% of Rillet’s net new ARR with customers in the UK and across Europe, including some of the fastest-growing AI companies like Black Forest Labs, Temporal, and Primer.
The expansion comes less than three months after Rillet raised a $100 million Series C at a $1 billion valuation led by ICONIQ, with participation from Sequoia and Andreessen Horowitz. Rillet now serves nearly 1,000 customers across 75 countries, including publicly listed enterprises and some of the fastest-growing companies globally. Rillet’s international net new ARR more than tripled month over month, reflecting accelerating demand beyond US borders.
UK companies were choosing Rillet long before it had a local presence, driving the company’s decision to expand into Europe. Europe is home to some of the world’s most ambitious companies, yet many of their finance teams still close the books on legacy systems.
Rillet is building a large-scale organization in London, with its founding UK team already in place and significant hiring planned in the months ahead. Rillet has a track record of attracting top talent, and this month, LinkedIn named it on its 2026 Top Startups list of 50 U.S. companies, a signal that UK and European finance teams are in good hands. The goal is to give finance teams in the UK and across Europe a team that is close by, invested in their success, and there for the long term.
For UK and European finance leaders, Rillet’s expansion comes at a critical time. As companies scale and move upmarket, finance teams face increasing pressure to scale efficiently, embrace AI, and build systems that can keep pace with the business. Rillet aims to help them navigate that complexity with a robust agentic platform and a dedicated team on the ground. Beyond technology, Rillet is bringing its Close Club community to Europe, which already connects over 1,500 finance leaders in the US, creating a space for CFOs to exchange ideas, share experiences, and learn from peers facing similar challenges.
London is a natural starting point for Rillet’s European expansion. As one of the world’s leading financial hubs, the city brings together a deep pool of finance and accounting talent, an established professional services ecosystem, and some of Europe’s fastest-growing and most innovative companies. The move also marks a return to familiar ground for Kopp, who studied accounting at the London School of Economics and spent several years working in the City.
Rillet is well positioned to tap into this ecosystem having built its category alongside the accounting firms that audit and advise the world’s largest companies, and many of those firms have established practices across the UK and Europe. Rillet’s ecosystem includes an alliance with EY, a strategic alliance with RSM, and partnerships with more than half of the Accounting Today top 20 CPA firms. Those relationships give Rillet a foundation to build local credibility, expand its network, and accelerate momentum across EMEA.
Rillet Expands into the UK: New London Office Follows Surging European Demand
Posted in Commentary with tags Rillet on November 9, 2026 by itnerdRillet today announced its expansion into the UK, with a new office in central London and its UK team already on the ground. European demand already drives 10% of Rillet’s net new ARR with customers in the UK and across Europe, including some of the fastest-growing AI companies like Black Forest Labs, Temporal, and Primer.
The expansion comes less than three months after Rillet raised a $100 million Series C at a $1 billion valuation led by ICONIQ, with participation from Sequoia and Andreessen Horowitz. Rillet now serves nearly 1,000 customers across 75 countries, including publicly listed enterprises and some of the fastest-growing companies globally. Rillet’s international net new ARR more than tripled month over month, reflecting accelerating demand beyond US borders.
UK companies were choosing Rillet long before it had a local presence, driving the company’s decision to expand into Europe. Europe is home to some of the world’s most ambitious companies, yet many of their finance teams still close the books on legacy systems.
Rillet is building a large-scale organization in London, with its founding UK team already in place and significant hiring planned in the months ahead. Rillet has a track record of attracting top talent, and this month, LinkedIn named it on its 2026 Top Startups list of 50 U.S. companies, a signal that UK and European finance teams are in good hands. The goal is to give finance teams in the UK and across Europe a team that is close by, invested in their success, and there for the long term.
For UK and European finance leaders, Rillet’s expansion comes at a critical time. As companies scale and move upmarket, finance teams face increasing pressure to scale efficiently, embrace AI, and build systems that can keep pace with the business. Rillet aims to help them navigate that complexity with a robust agentic platform and a dedicated team on the ground. Beyond technology, Rillet is bringing its Close Club community to Europe, which already connects over 1,500 finance leaders in the US, creating a space for CFOs to exchange ideas, share experiences, and learn from peers facing similar challenges.
London is a natural starting point for Rillet’s European expansion. As one of the world’s leading financial hubs, the city brings together a deep pool of finance and accounting talent, an established professional services ecosystem, and some of Europe’s fastest-growing and most innovative companies. The move also marks a return to familiar ground for Kopp, who studied accounting at the London School of Economics and spent several years working in the City.
Rillet is well positioned to tap into this ecosystem having built its category alongside the accounting firms that audit and advise the world’s largest companies, and many of those firms have established practices across the UK and Europe. Rillet’s ecosystem includes an alliance with EY, a strategic alliance with RSM, and partnerships with more than half of the Accounting Today top 20 CPA firms. Those relationships give Rillet a foundation to build local credibility, expand its network, and accelerate momentum across EMEA.
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