Deterministic 6-step rules engine for underwriting lead processing

Underwriting lead processing is inefficient and risky for a broad range of financial institutions: community banks, regional lenders and fintechs struggle with inconsistent intake, manual triage of messy documents, and opaque decisions that raise compliance and cost-to-originate concerns. Roughly 100,000 potential institutional customers face these pain points, and many are still willing to pay for reliable, auditable automation rather than bespoke, brittle integrations. You could build a deterministic 6-step rules engine that standardizes intake, uses LLM-enabled extraction only for normalization of messy documents, then applies versioned, auditable rule logic to score, route and approve leads via an API-first, cloud-native service. The product would deliberately separate probabilistic preprocessing from deterministic decisioning, and could be marketed with a $120K ACV enterprise plan or modular pricing for pilots and integrations. The market is attractive now: LLM-enabled data extraction materially improves normalization, regulators are increasingly focused on explainability, and cloud-native lending platforms make modular rules engines easier to adopt—supporting a $12.0B addressable market and a market score of 95/100 with revenue potential at 90/100. Competition is medium; larger decisioning suites exist, but few offer a compact, auditable lead-processing workflow with the same focus on explainability. You can differentiate by shipping a crisp, six-step workflow with deterministic audit trails, tight APIs for low-friction integration, and clear compliance documentation tailored for examiners, targeting 5–10 pilot customers to prove ROI quickly. Realistic challenges are lengthy sales cycles, integration work with legacy systems, and the need to validate that the LLM + deterministic approach measurably reduces costs and false positives versus incumbent toolchains.