Rillet opens London office to expand its European business

US accounting software startup Rillet has established an office in central London, marking its first major European expansion, the company said. It has signed its first UK employees for sales, deployment and customer support, with plans for a full London team.

The company did not disclose a hiring target. Rillet said customers across the UK and the rest of Europe contribute 15% of its new annual recurring revenue. European clients include Black Forest Labs, an AI image company, and software business Temporal.

Chief executive and co-founder Nicolas Kopp said UK finance teams adopted Rillet within a year of its US launch, setting it up remotely with little marketing from the company. He said having staff nearby would help Rillet better understand those customers’ needs.

Rillet develops enterprise resource planning software for managing company finances. It says the platform updates accounts in real time and uses AI agents to handle some month-end accounting tasks. Its London team will follow the US model of helping customers test, deploy and use the software.

The move follows a US$100 million funding round less than three months earlier that valued Rillet at US$1 billion. ICONIQ led the investment, alongside Sequoia and Andreessen Horowitz. Rillet says it now serves nearly 1,000 customers across 75 countries, compared with more than 600 reported in August.

Rillet also intends to use existing accounting-firm relationships, including alliances with EY and RSM, to support expansion across Europe, the Middle East and Africa.