Why we're building Rex
Why we're building Rex
From the founders
Working capital is top of mind for every CFO
In a tighter macro environment, with higher interest rates and more uncertainty, cash discipline matters more than ever.
Every CFO knows how to improve cash. Tighten terms. Collect faster. Enforce contracts. Audit accurately. The problem isn’t strategy. It’s capacity.
No finance organization can renegotiate thousands of payment terms, chase every discrepancy, audit every invoice, and follow up continuously across millions in receivables. This work has material impact, but the volume exceeds what human teams can handle. We’ve seen this repeatedly inside large finance organizations trying to move the needle on cash.
In physical-world enterprises, cash flow is the lifeblood
And operations are fragmented. Finance work lives across ERPs, customer portals, email threads, spreadsheets, delivery notes, and shared drives. Teams spend their time reconstructing context and coordinating next steps. Output is constrained by hours in a day. The rest ends up in a long tail that no one has time for.
Legacy tools reduced effort, not workload
For the last decade, finance teams have been sold AR and collections tools like HighRadius and Billtrust. These tools automated simple steps. When anything went off script, people had to intervene. At scale, teams lean on shared service centers and offshore operations just to keep the system running. These tools reduced some of the effort, but did not remove the capacity constraint.
AI changes the equation
AI can now take responsibility for execution, not just assist it. Actually do the work, instead of just surfacing issues and routing tasks.
Rex is the execution layer for working capital
ERPs record. Rex executes. A CFO sets the objective. Reduce DSO. Pull cash forward. Clean up the long tail. Rex executes the strategy with clear controls and full auditability. Finance teams step in only when judgment is required.
Work that was previously infeasible becomes routine
For decades, finance teams scaled by adding people. With Rex, executing working capital initiatives is no longer constrained by headcount. Want to audit every PO and invoice for unenforced payment penalties? Let Rex handle it. What used to take months, now takes minutes.
Every CFO already knows what would improve their cash position. We’re building Rex to make it possible to act on those decisions instantly and at scale.
Merlin Kafka & Lewis Blackwood
Founders, Rex
Working capital is top of mind for every CFO
In a tighter macro environment, with higher interest rates and more uncertainty, cash discipline matters more than ever.
Every CFO knows how to improve cash. Tighten terms. Collect faster. Enforce contracts. Audit accurately. The problem isn’t strategy. It’s capacity.
No finance organization can renegotiate thousands of payment terms, chase every discrepancy, audit every invoice, and follow up continuously across millions in receivables. This work has material impact, but the volume exceeds what human teams can handle. We’ve seen this repeatedly inside large finance organizations trying to move the needle on cash.
In physical-world enterprises, cash flow is the lifeblood
And operations are fragmented. Finance work lives across ERPs, customer portals, email threads, spreadsheets, delivery notes, and shared drives. Teams spend their time reconstructing context and coordinating next steps. Output is constrained by hours in a day. The rest ends up in a long tail that no one has time for.
Legacy tools reduced effort, not workload
For the last decade, finance teams have been sold AR and collections tools like HighRadius and Billtrust. These tools automated simple steps. When anything went off script, people had to intervene. At scale, teams lean on shared service centers and offshore operations just to keep the system running. These tools reduced some of the effort, but did not remove the capacity constraint.
AI changes the equation
AI can now take responsibility for execution, not just assist it. Actually do the work, instead of just surfacing issues and routing tasks.
Rex is the execution layer for working capital
ERPs record. Rex executes. A CFO sets the objective. Reduce DSO. Pull cash forward. Clean up the long tail. Rex executes the strategy with clear controls and full auditability. Finance teams step in only when judgment is required.
Work that was previously infeasible becomes routine
For decades, finance teams scaled by adding people. With Rex, executing working capital initiatives is no longer constrained by headcount. Want to audit every PO and invoice for unenforced payment penalties? Let Rex handle it. What used to take months, now takes minutes.
Every CFO already knows what would improve their cash position. We’re building Rex to make it possible to act on those decisions instantly and at scale.
Merlin Kafka & Lewis Blackwood
Founders, Rex