Rillet

Rillet is a cloud-based ERP and accounting platform that positions itself as "AI-native," covering general ledger, accounts receivable, accounts payable, revenue recognition, month-end close and financial reporting. Its stated aim is a "zero-day" or continuous close, where books are updated in real time rather than through a long manual period-end process. The system is designed to replace legacy ERPs rather than sit alongside them, ingesting structured data through native integrations with CRM, billing, payments, payroll, AP, banking and tax systems so transactions can be posted to the ledger with sufficient context to avoid repeated manual exports and imports.

The product includes an automated general ledger with built-in schedules (revenue waterfall, deferred revenue, prepaids, fixed assets), contract-driven AR and invoicing with usage-based billing support, ASC 606 revenue recognition applied directly from contracts, multi-entity and multi-currency consolidation with intercompany eliminations and translation adjustments, flexible GAAP reporting with custom reporting dimensions, and a Launchpad dashboard surfacing real-time metrics such as cash reconciliation, outstanding invoices and system sync issues. Its AI layer, Aura AI, comprises an assistant for plain-language questions and report generation, workflow agents that execute accounting tasks end-to-end, always-on monitoring that flags anomalies and proposes accruals, and an MCP interface for connecting tools such as Salesforce, Snowflake, Claude and BI systems to live ledger data. Reporting combines GAAP financials with operator and SaaS metrics.

Rillet serves mid-market, enterprise and publicly listed companies, and states it works with public companies with over $2B in revenue. Named customers include Postscript, Windsurf, Mercor, Function Health, Temporal, Jump, Scribe and Haus.

Founding story

Rillet states it was founded in 2021 by Nicolas Kopp (CEO and co-founder) and Stelios Modes (CTO and co-founder). Kopp has described his experience as US CEO of N26, where waiting weeks for critical business metrics from world-class finance teams constrained by legacy systems prompted him to look for an alternative. He partnered with Modes, described as the technical architect behind N26's payment infrastructure, to rebuild enterprise accounting. The team frames the product as the ERP a group of accountants wished they had, citing frustration with manual data reconciliation, repeated ERP migrations and outgrowing starter systems.

Business model

Rillet sells a subscription cloud ERP that replaces a customer's legacy accounting system. Implementation is white-glove, performed by Rillet's own team of CPAs and ex-auditors, and typically takes four to six weeks depending on business complexity and the volume of historical data migrated.

Subscription software. Rillet states it does not charge per seat and does not price based on customer revenue; pricing is instead based on the features used and the complexity of the customer's operations.

Traction

Rillet reports more than 600 customers, including publicly listed enterprises and companies with over $2B in revenue, and a 5.0 G2 rating. It says it doubled new ARR in the three months preceding its August 2026 Series C, and had doubled ARR over the prior 12 weeks at the time of its August 2025 Series B, when it had signed over 200 customers. Company-stated platform metrics include 100M+ transactions processed daily, 99.7% of journal entries booked automatically, seven days saved on closing the books, and 12,000+ integrations available. Customer examples cited include Postscript, with over $100M in ARR, closing books in three days; Windsurf running finance with a team of two; and Mercor scaling past $2B in ARR with a finance team of three.

Latest developments

In August 2026 Rillet announced a $100 million Series C led by ICONIQ at a $1 billion valuation, with participation from Sequoia, Andreessen Horowitz, Sequoia Global Equities, Bain Capital Ventures, Oak HC/FT, Battery Ventures, FirstMark, Scale Venture Partners and Creandum, bringing total funding past $200 million. CEO Nicolas Kopp said the round came together in under 48 hours and that the company had not planned to raise. Seth Pierrepont of ICONIQ joined the board. The proceeds are directed at what the company calls "accounting superintelligence" — AI agents performing finance work inside a real-time general ledger with human approval and audit trails. Rillet also launched an alliance with Ernst & Young for finance transformation earlier in 2026 and is expanding beyond tech and AI into biotech, healthcare, fintech, logistics and professional services.