A different kind of modern finance platform: deterministic, provable, and control-first.
Rillet represents the new wave of finance systems — an AI-native ERP with real-time books, automated close, native multi-entity and revenue recognition. RegNexus Books shares the ambition and goes further in a different direction: deterministic financial truth, controlled execution, point-in-time queryability, live claims certification, and an architecture built to prove what is true.
Rillet is the strongest modern benchmark. Books wins on determinism, proof and platform vision.
Open the cash or bank reporting area. Choose the period. Review accounts. Interpret the number.
RegNexus Books vs Rillet
Signs you may have outgrown Rillet.
You want a deterministic truth boundary, not model-driven figures.
You need continuous, live certification of controls.
You need point-in-time historical state.
You want verifiable proof and authority, not just reporting.
Rillet records the business. RegNexus controls the financial system around it.
Record and control financial truth.
Model what could happen next.
Create evidence of what is true.
Connect authority, agreements, obligations and outcomes.
Choose the right tool for where you are.
When Rillet may be the better fit
- You want a modern AI-native ERP and are comfortable with model-driven accounting.
- Rillet's close automation and multi-entity already meet your needs.
When RegNexus Books becomes the better choice
- Deterministic financial truth is non-negotiable.
- You need execution-safe accounting with a hard AI boundary.
- You want a temporal ledger and live claims certification.
- You value Frontier proof / authority and a UK-native control mindset.
Moving should not mean losing financial history.
We map your existing books, accounts, balances and operating structure.
Opening positions and imported information are checked before they become the RegNexus baseline.
Entities, roles, dimensions, banking and controls are set around how you actually work.
Your historical accounting becomes the starting point for a controlled financial system.
Questions, answered honestly.
Isn't Rillet also AI + accounting?
Yes — and we respect it. The difference is the boundary: Rillet's AI works on the GL; Books calculates truth deterministically and uses AI only to explain, never to author figures.
You need a system that knows which numbers are true.
Books £49/mo · Books Pro £149/mo · Enterprise from £349/mo + VAT
Comparison information is based on publicly available product information reviewed in September 2026. Product features, pricing and availability may change. RegNexus Limited is not affiliated with the companies compared on this page. All third-party trademarks belong to their respective owners. Comparison last reviewed 2026-09-11.