Codex is a research and case law platform built for attorneys who treat precedent as a discipline. Every opinion indexed, every citation traced, every brief grounded in the record.
Begin a TrialMap the full genealogy of a citation — which cases adopted it, which distinguished it, which overruled it. The treatment history is rendered as a readable lineage, not a list of links.
Query the corpus in the language of your brief. Codex returns the controlling opinions, ranked by jurisdictional weight and recency, with the relevant passages already extracted.
Paste a brief and Codex audits each citation for accuracy, pin-cite precision, and subsequent treatment. Flagged authorities are returned with the correcting language and a revised pin cite.
Every statute is paired with the interpretive opinions that define it. Move between code and case in a single reading, with annotations noting amendments and judicial gloss.
Restrict results to the court, circuit, or state whose authority governs your matter. Mandatory and persuasive authority are labeled distinctly, so the hierarchy of precedent is never in question.
Organize opinions, statutes, and notes into matter-specific folders that persist across sessions. Share with co-counsel, export to brief format, and maintain a defensible research trail.
Federal and state opinions from 1960 to the present session, with daily ingestion of new decisions as they are released by the courts.
Enter the issue in the language of your matter. Codex interprets the legal concepts and identifies the controlling jurisdiction without requiring boolean operators or field codes.
Opinions are returned with the answering passages already extracted, treatment history noted, and authority hierarchy labeled. Read the holding first, then the full opinion if the matter demands it.
Export to your brief with verified pin cites and current treatment. Every citation is confirmed against the live record before it leaves the platform, so what you file is what the court will find.
"Codex replaced three subscriptions and a paralegal's worth of Shepardizing. The citation tracing alone has changed how I draft appellate briefs — I can see the lineage of an argument in a single reading."
"I have practiced for twenty-two years. This is the first research tool that respects the way a lawyer actually thinks. It reads like a treatise, not a database, and the results are the results I would have found myself — only faster."
"The brief verification caught a miscitation the morning of filing. That alone justified the subscription. But the daily comfort of knowing every authority is still good law — that is what keeps me here."
"We onboarded forty associates in a week. The learning curve is negligible because the interface speaks the language of the practice. Our research hours are down, and our brief quality is measurably up."