Invoice Butler and Rillet Partner to Streamline Accounting Through Cash

Invoice Butler and Rillet Partner to Streamline Accounting Through Cash

Great finance systems don’t just stop at clean books…they carry clean data all the way through cash.

Both Invoice Butler and Rillet were founded in New York City, built alongside modern finance teams who needed real-time accounting and reliable collections—without stitching together legacy tools or manual processes.

Today, we’re excited to announce our integration + partnership: combining Rillet’s real-time accounting platform with Invoice Butler’s end-to-end accounts receivable execution, so invoices flow cleanly from creation to collection—and straight back into the system of record.

Accounting and Collections, Designed to Work Together

Rillet is the system of record for modern finance and accounting teams. It’s where invoices are created, revenue is tracked, and books stay continuously up to date.

Invoice Butler works hand-in-hand with Rillet by managing everything that happens after an invoice is issued—while ensuring all activity stays accurately recorded in Rillet.

The result: finance teams get clean accounting and clean collections, without manual reconciliation or disconnected systems.

From Invoice Creation to Cash: Fully Reflected in Rillet

Once invoices are created in Rillet, Invoice Butler takes over collections:

• Context-aware AR follow-ups
  
  
• Handling customer replies, questions, and payment timing
  
  
• Managing back-and-forth communication across email and portals
  
  
• Uploading invoices and documentation into supplier portals like Coupa and Ariba
  
  
• Escalations for stalled or high-risk invoices
  
  
• Persistent follow-through until payment is received
  
  

As payments progress and land, Invoice Butler ensures outcomes are cleanly recorded back in Rillet, so finance teams always have a real-time, accurate view of cash and receivables.

How the Rillet + Invoice Butler Integration Works

The combined workflow is intentionally simple:

1. Invoices are created and tracked in Rillet
   
   
2. Invoice Butler manages all collections and execution
   
   
3. Payment status and outcomes are reflected back in Rillet
   
   

No shadow ledgers.
No manual updates.
No reconciliation gymnastics.

Just one source of truth—from invoice creation to cash in the bank.

Built on Shared Roots and a Shared Philosophy

This partnership works because both teams were built for the same customer—and built in the same place.

From our shared NYC roots, Rillet and Invoice Butler were designed for lean, modern finance teams that care about:

• Speed without sacrificing accuracy
  
  
• Fewer tools with tighter integration
  
  
• Systems that actually work together
  
  

By aligning accounting and collections around a single source of truth, teams spend less time chasing and more time building.

What Our Founders Are Saying

“Rillet was built to be the system of record for modern finance teams. Partnering with Invoice Butler ensures that what starts in Rillet—an invoice—finishes there as well, with collections activity and cash outcomes reflected cleanly in the books.”
-Nicolas Kopp, CEO, Rillet

“What makes this partnership special is the tight loop. Invoices are created in Rillet, we handle the messy work of getting paid, and everything flows right back. That’s how finance systems should work—and it’s something we both believe in.”
-Mihir Deo, CEO, Invoice Butler

One Clean System From Invoice to Cash

This partnership is designed for teams who want to:

• Run real-time, accurate accounting in Rillet
  
  
• Eliminate manual AR work and follow-ups
  
  
• Maintain a single source of truth as they scale
  
  

Rillet creates and tracks the invoice.
Invoice Butler ensures it gets paid.
And the outcome lives right back in Rillet.

Together, we give finance teams a modern, end-to-end finance system. 

If you’d like to see how Rillet and Invoice Butler work together in practice, we’d love to show you. Book a demo below.

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