Rillet and Attivo Deepen Partnership to Deliver AI-Native Finance and Strategic CFO Services
Rillet and Attivo’s partnership connects category-defining ERP technology with industry-leading fractional CFO and accounting services
San Francisco, CA — December 15, 2025 — Rillet, the AI-native ERP platform, and Attivo Partners, a leading provider of fractional CFO and accounting services for innovative, venture-backed startups, today announced a strategic partnership to deliver a modern finance solution designed for high-growth companies.
By combining Rillet's groundbreaking accounting software and intelligent automation with Attivo's strategic finance expertise, the partnership gives startups the technology and advisory support they need to scale efficiently.
Rillet and Attivo have already built a strong track record serving joint clients, including high-growth companies with billion-dollar valuations that must navigate increasingly complex financial operations.
As a Rillet-certified implementation partner, Attivo provides dedicated technical and implementation expertise alongside fractional CFO services and full-service accounting tailored to venture-backed companies at every stage of growth.
This partnership brings the right technology and the right financial leadership for businesses to scale effectively. Rillet brings AI-native ERP capabilities with advanced revenue recognition, multi-entity consolidation, and intelligent automation, while Attivo delivers the strategic guidance and operational support that turns financial data into business value.
"We're seeing companies with increasingly complex business models, from usage-based billing to multi-entity structures, that need both intelligent software and strategic financial leadership. This partnership is a powerful step forward for our clients who want category-defining ERP technology combined with industry-leading fractional CFO and accounting services." – Nicolas Kopp, CEO and Co-Founder of Rillet
The partnership supports companies across a wide range of sizes and complexity, from early-stage startups building their first financial systems to high-growth companies managing multimillion-dollar funding rounds and complex revenue models.
"Implementing an ERP is never just a software exercise; it’s a finance transformation. Rillet’s AI-native platform gives our teams real-time automation and visibility, and Attivo ensures those capabilities translate into operational clarity and strategic execution. As an implementation partner, we’re helping founders use data to make better business decisions and build systems that scale from day one." – Greg Capitolo, Managing Partner at Attivo Partners
Rillet and Attivo will co-host a webinar in early January 2026. The webinar will explore how startups can leverage AI-native finance technology and strategic CFO leadership to accelerate growth. Reserve your spot here.
About Rillet
Rillet is the AI-native accounting platform made to tailor fit the workflows of accountants and a full replacement for legacy ERPs. Scaling and hyper-growth companies like Mercor and Windsurf use Rillet to enable a smarter close with native integrations, automated journal entries, and AI embedded workflows. They are backed by Sequoia, Andreessen Horowitz and ICONIQ with offices in New York, San Francisco, and Barcelona.
About Attivo
Attivo Partners is a full-service Finance and Accounting firm. Their fractional CFO and accounting services help founders navigate the complexities of company building through all stages of the startup journey—raising capital, building business models, and achieving successful exits. Their experience spans over 600 venture-backed startups, including SaaS, AI, Web3, Biotech, and a range of emergent industries.
