Top 100 accounting firm Wiss and AI-native enterprise resource planning platform Rillet announced June 26 a strategic partnership that will allow businesses to gain access to a co-sourced accounting model that blends technology and expert advisory services.
Rillet’s software automates core accounting tasks, such as invoicing, monthly closes, and financial reporting, while Wiss provides outsourced accounting support, financial reporting expertise, and tailored strategic advisory.

- Related article: Wiss Enters Strategic Partnership With AI Platform Basis
“Our partnership with Rillet illustrates the direction that Wiss is heading as a modern accounting and advisory firm focused on delivering actionable and strategic insights that go beyond just numbers,” Wiss CEO Paul Peterson said in a statement. “We’re continually seeking out forward-thinking solutions that break the mold of traditional accounting and reflect a more modern, technology-enabled way of supporting our clients.”
Additional benefits of this collaboration include:
- Shorter close cycles and stronger reporting: Automated workflows and clean data structures streamline monthly closes and reduce time spent on manual reporting.
- Built-in scale and flexibility: Businesses get access to enterprise-grade technology and finance expertise without the overhead of building it all in-house.
- One unified experience: A fully integrated model where software, services, and strategic guidance work seamlessly together, eliminating the gaps and inefficiencies that come from juggling multiple vendors or platforms.
“Rather than offering traditional outsourcing, Wiss has embraced a co-sourced model that pairs strategic guidance with day-to-day execution,” said Wiss President Jim Duffy. “By integrating Rillet’s technology into this model, we’re able to give clients real-time visibility into their financials while significantly reducing the manual work behind the scenes. It’s a more modern, efficient way to support businesses as they grow and face more complex financial demands.”
“Wiss is a firm that’s truly thinking ahead when it comes to modern finance,” added Rillet CEO Nicolas Kopp. “They share our belief that companies deserve better tools and better guidance. This partnership is about delivering both, so finance leaders can spend less time compiling numbers and more time acting on them.”
Thanks for reading CPA Practice Advisor!
Subscribe Already registered? Log In
Need more information? Read the FAQs
Tags: Accounting, co-sourcing, ERP software, Rillet, Small Business, Technology, Wiss