Custosa

Custosa is the runtime data-control plane for enterprise AI. Connect an AI assistant or RAG pipeline to real systems and retrieval pulls whatever is relevant to a question. But relevance is not permission. The model has no idea what the person asking is cleared to see, so sensitive records can reach the prompt and leak in the answer. A prototype hides this on sample data; production, on real records, is where it leaks. Custosa sits between your data and your model. It inspects every record at runtime, redacts by role before anything reaches the prompt, and seals every decision as tamper-evident evidence. Unauthorized content never enters the context, so the model cannot leak what it never saw. The result: permission-aware retrieval, enforced at runtime, with an audit trail you can prove. Custosa is model-agnostic across OpenAI, Anthropic, and Gemini, and built for teams handling regulated data in healthcare, financial services, and beyond. What Custosa provides: 1. Runtime inspection and field-level redaction of every record before your AI sees it 2. Per-user, role-aware access control for RAG and AI agents 3. Content-free, tamper-evident evidence for every decision 4. A model- and stack-agnostic control plane that drops into your existing pipeline Inspect every record before your AI sees it.