Rillet opens a London office 12 weeks after its $100m Series C
The San Francisco accounting software company says customers in Europe bring 10% of its net new recurring revenue, and its first London staff are in place with more hiring planned
- London office announced on 9 November 2026, with a founding team in place
- Customers in Europe bring 10% of net new ARR, according to Rillet
- Nearly 1,000 customers in 75 countries
- Series C of $100m at a $1bn valuation, led by Iconiq, on 17 August 2026
Rillet’s pricing page lists no subscription prices. It puts implementation at $10,000–$30,000 (£7,400–£22,000) over four to six weeks, led by certified accountants. Rillet’s site carries comparisons with NetSuite, Sage Intacct, SAP and QuickBooks.
“Within a year of launching in the US, we already had finance teams in the UK running on Rillet”Nicolas Kopp, chief executive, Rillet
Rillet, a San Francisco company that sells accounting software to finance teams, announced on 9 November that it has opened an office in central London. Customers in Europe account for 10% of its net new annual recurring revenue (ARR), the company said.
A founding team is already working in London and Rillet said it plans significant hiring in the coming months. It gave no headcount and no address.
The office opens 12 weeks after Rillet raised a $100m (£74m) Series C at a $1bn (£740m) valuation. Iconiq led the round, announced on 17 August, with Sequoia and Andreessen Horowitz among the investors. It took total funding past $200m (£148m). Rillet reported more than 600 customers that day and now reports nearly 1,000 in 75 countries.
Rillet names three AI companies as customers
Rillet names Black Forest Labs, Temporal and Primer among the customers behind the European figure. Dave Arkell, chief financial officer of Black Forest Labs, said in the announcement that the company chose Rillet as its enterprise resource planning (ERP) system.
The product is an ERP system built on a general ledger that updates in real time. AI agents do accounting work inside the ledger, subject to human approval and an audit trail. In August, Rillet said large companies were moving to it from Oracle Fusion, SAP, Workday, Microsoft Great Plains and NetSuite.
Close Club follows the office to Europe
Rillet has an alliance with EY, a strategic alliance with RSM and partnerships with more than half of the Accounting Today top 20 accounting firms. Close Club, its community of more than 1,500 finance leaders in the US, will start in Europe. Rillet gave no start date.
Nicolas Kopp, Rillet’s chief executive, studied accounting at the London School of Economics and worked in the City for several years.
Sources
- Rillet, “Rillet Expands into the UK: New London Office Follows Surging European Demand”, press release, 9 November 2026. https://www.rillet.com/blog/rillet-opens-london-office
- Rillet, “Rillet raises $100M Series C at $1B valuation to build Accounting Superintelligence”, press release, 17 August 2026. https://www.rillet.com/blog/rillet-raises-100m-series-c-at-1b-valuation-to-build-accounting-superintelligence
- Rillet, pricing page, read on 10 November 2026. https://www.rillet.com/pricing
