Use Cases / Legal & Professional Services

Prompt audit and matter isolation for law firms

Bar associations are beginning to issue guidance on attorney supervision of AI-assisted work product. Meibel gives managing partners a complete, queryable record of what the firm's LLM systems were asked and what client data they processed — per matter, per attorney. It extends your firm's existing data governance and confidentiality controls to AI workloads; it does not substitute for legal ethics compliance review.

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Matter isolation example
audit_entry
tenant_id"matter:2025-ACQ-0047"
pii_findings[CLIENT_NAME, DEAL_TERMS]
policy_verdict"REDACTED"
Attorney-client confidentiality at the infrastructure layer
Per-matter tenant isolation
Each matter number becomes a tenant context. Matter A's LLM queries are hard-isolated from Matter B. Cross-matter data contamination becomes architecturally impossible.
Client identifier and deal-term redaction
Client names, counterparty identities, deal pricing, litigation strategy notes — configurable custom patterns for law firm identifier types that standard PII engines miss.
Managing partner audit query
Query all LLM calls by matter number, date, or attorney. The foundation for an AI use policy that satisfies bar association guidance on attorney supervision of AI-assisted work product.
Conflict-screening protection
Tenant isolation prevents inadvertent cross-matter information flow during LLM-assisted conflict checks — a risk that generic LLM deployments create without a policy plane.
In use at law firms

Per-matter isolation was the requirement our general counsel needed before approving the deployment. Meibel's proxy gave us a concrete architecture answer — not a policy promise — that client data from one matter cannot appear in another matter's context window.

Chief Information Officer — Am Law 50 Firm (NY/DC corridor)

A prompt audit record your managing partner can query by matter number.

Per-matter tenant isolation, prompt version hashing, and a client-data redaction layer your general counsel can point to. Request access for a legal-specific configuration walkthrough.

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