Rillet Raises $100M in 48 Hours, Hits $1B Unicorn Valuation

Summary

AI accounting startup Rillet raised $100 million in 48 hours at a $1 billion valuation after a board meeting showed annualized revenue had doubled in one quarter, customer growth included public companies, and an EY alliance would bring AI tools to the auditor. The company was not fundraising. Iconiq's Seth Pierrepont led the Series C and joined the board, with Sequoia investor Julien Bek also backing the deal. Out of stealth for two years, Rillet has raised $200 million from Iconiq, Andreessen Horowitz and Sequoia, including a $70 million Series B last summer; Sequoia led its Series A last summer. It serves 600 customers. Bek sees agentic finance as a major AI software opportunity; 2026 software stock declines showed investor fears for incumbents.

CEO Nicolas Kopp says customers, from laundromats to a major sports franchise, replace rather than pilot incumbent systems: 50% come from Intuit, 30% from NetSuite and Sage Intacct, and 20% from Oracle, SAP, Workday and Microsoft. Built for people to work beside bookkeeping agents, Rillet routes requests to chosen models, including OpenAI or Anthropic, blocks model training and cross customer data use, and gives agents memory. A governance feature released about three months ago exposes every agent decision, source number and calculation as agents handle longer, multistep workflows. Public company rules still require human approval for every AI transaction. Accounting graduates have declined since at least 2010, 61% of finance leaders struggled to hire finance, accounting and CPA talent in the past year, and a recent Stanford report found no widespread displacement. The Bureau of Labor Statistics projects demand will rise at least 5%, adding 72,800 jobs by 2034, with automation shifting work toward advisory and analysis.