Rillet raises $100M Series C at $1B valuation to expand its AI accounting platform

AI-native accounting startup Rillet raises a $100 million Series C at a $1 billion valuation, according to reports. The company, which exited stealth about two years ago, says the funding supports efforts to place AI agents inside corporate accounting workflows, including the general ledger.

Both outlets describe ICONIQ as the lead investor and characterize the round as a step toward unicorn status. TechCrunch adds that Rillet’s recent performance includes doubling its annual recurring revenue (ARR) over the past three months. The Next Web reports the deal is Rillet’s third funding round in 14 months, framing the company as one of the newer “AI unicorn” startups.

While the coverage is consistent on the core figures—$100M, $1B valuation, and ICONIQ leading—TechCrunch emphasizes ARR growth as a recent milestone, whereas The Next Web highlights the platform’s purpose in rebuilding corporate accounting around AI agents and includes additional context about the company’s recent fundraising cadence.