Legal reasoning. Reimagined.

See the law
from every cortex.

Arbiter is a deterministic coherence engine for legal reasoning. Not AI. A measuring instrument for legal documents.

Request Access →Open Workspace ▷
⌖Deterministic◇Reproducible◷Verifiable▣Private & Secure
Judge CortexPrecedent, statutory interpretation, and judicial reasoning.
Plaintiff CortexLiability, harm, and remedies from claimant lens.
Defense CortexRisk allocation, defenses, and adverse outcomes.
Regulator CortexCompliance, policy, and regulatory frameworks.
Arbitrator CortexNeutral evaluation, equity, and balanced resolution.
General Counsel CortexBusiness impact, risk posture, and strategic alignment.
Investigator CortexFacts on the record, evidence integrity, and inconsistencies.
Cortex workspace

Analyze the same corpus from two legal perspectives.

Select a curated sample matter, choose a cortex for each seat, and run the same corpus side by side. Cortex labels stay visible in the interface, but only the hidden prefix is prepended to the backend query.

Active legal corpus•0 passages•Default frame
Request Corpus Indexing →
Run the demo on curated matters. Index private corpora by request. For depositions, contracts, expert reports, diligence rooms, or regulatory files, Arbiter prepares a matter-scoped corpus with stable citations before analysis.
Index my corpus →
Left Seat—
Select Perspective (Cortex)Default · no prefix
Your Questionhidden cortex prefix sent to backend
◀Choose a cortex or default frame, then measure. Findings appear here ranked by coherence.
Corpus Viewer
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Right Seat—
Select Perspective (Cortex)Default · no prefix
Your Questionhidden cortex prefix sent to backend
▶Choose a cortex or default frame, then measure. Findings appear here ranked by coherence.
GeometryLeft top: —Right top: —Δ: —Overlap: —