In an environment where vendors face dozens of security questionnaires across frameworks such as [SOC 2](https://secureframe.com/hub/soc-2/what-is-soc-2), [ISO 27001](https://www.iso.org/standard/27001), GDPR and CCPA, generating precise, context‑aware evidence quickly is a major bottleneck. This article introduces an ontology‑guided generative AI architecture that transforms policy documents, control artifacts and incident logs into tailored evidence snippets for each regulatory question. By coupling a domain‑specific knowledge graph with prompt‑engineered large language models, security teams achieve real‑time, auditable responses while maintaining compliance integrity and reducing turnaround time dramatically.

This article introduces a novel predictive trustworthiness forecasting engine that uses temporal graph neural networks, differential privacy, and explainable AI to deliver real‑time vendor risk scores. Readers will explore the architecture, data pipeline, privacy safeguards, and practical steps for implementation, unlocking proactive risk mitigation for SaaS companies.