LAW FIRM OPERATING SYSTEM

The operating system for the AI-assisted law firm.

Every firm using AI to analyse legal matters faces the same question before signing an opinion: can I defend this? Nexus turns each AI analysis into an auditable, reviewable artefact exportable as an annex to the opinion — not a black box.

THE PROMISE

No competitor today delivers an evidentiary file of the AI's reasoning that you can export as an annex to the opinion. Nexus repositions legal AI from "assistant that may be wrong" to "infrastructure for a defensible opinion." For a partner signing with their bar number on the line, that difference is the purchase.

THE PROBLEM IT SOLVES

Can I defend this before a partner, a client or a bar council?

A good AI answer isn't enough. A partner signing with their bar number on the line needs to know which sources the AI consulted, which model generated the answer, who reviewed it, which statements are verified and which are doubtful, whether there are procedural deadlines that cannot be missed, and whether the matter creates a conflict of interest with a prior client. Until now no AI legal platform answered all of these questions in an integrated way. Nexus does.

WHAT NEXUS DELIVERS TODAY

Nine integrated capabilities, one workflow.

Each feature is shipped to production today. None of them are mockups, slides or roadmap. They compose the operational layer between the AI reasoning engine and the lawyer's signature.

01 · DEFENCE DOSSIER

Evidentiary file of the output.

Every analysis ships with its automatic evidentiary file: which legal corpus was consulted, which analysis modules fired, which AI models took part in the reasoning chain, what adversarial review Node B carried out and what risk analysis Node C contributed — sealed with a SHA-256 integrity hash so any post-issuance alteration is mathematically detectable. Exportable as an annex to the opinion: every Nexus analysis becomes an auditable artefact, not a black box.

02 · HUMAN REVIEW

AI is the starting point, not the deliverable.

Nexus enforces a structured review flow with explicit states — Generated by AI → Under review → Approved → Sent. The lawyer can mark an analysis as under review, request corrections, leave review notes and finally approve with the stamp of who approved and when. Analyses with pending corrections are blocked until they're resolved. No opinion ever leaves marked Approved without a human having validated it explicitly.

03 · EVIDENCE TRAY

Every statement classified by certainty level.

Nexus parses each opinion and identifies every statement with legal backing, classifying them by certainty: [L1] documented certainty, [L2-J] case law, [L3-NV] non-verifiable, [L4] inferred, [L5-C] conjecture, [L5-P] procedural deadline. The reviewer marks each as verified, disputed or potential hallucination. Hallucinations are highlighted and block approval of the analysis until resolved.

04 · AUTOMATIC DEADLINES

Procedural deadlines and obligations, extracted.

Nexus detects and extracts every procedural deadline, expiry and obligation in the analysis: filing dates, appeal windows, notification terms, limitation periods, hearing dates. Each deadline is recorded with description, critical date, obligation type and compliance state. The system computes in real time which deadlines are overdue, which fall within the next 7 days and which remain open — and surfaces them in the matter panel, in the case file and in the global control inbox.

05 · AI ACT TRACEABILITY

EU AI Act Art. 50 compliance, automatic.

EU Regulation 2024/1689 requires transparency over the use of AI in high-impact contexts; legal analysis is one of them. Nexus emits a structured traceability log per analysis: prompt used, prompt hash, corpus consulted, models in the reasoning chain, system version, timestamp, output integrity hash and conformity declaration in four languages (ES/EN/FR/DE). Exportable as JSON (for compliance system integration) or plain text (as an annex). The panel shows compliance level: Complete (Node B and C), Partial (Node B), or Basic (Node A only).

06 · FIRM MEMORY

Your firm's style, taught once.

Every firm has its own style: clauses it always includes, preferred tone in opinions, in-house risk criteria, specific report formats. Nexus remembers. Firm Memory holds permanent preferences by category — Clauses, Tone, Risk, Format, General — that are injected automatically into every analysis. Set it once and Nexus applies it across every opinion, with no need to repeat instructions on each query. Each preference is individually toggleable, editable and organisable.

07 · CONFLICT CHECK

Conflicts of interest checked before you accept.

Conflict of interest is a deontological obligation, not an option. Before accepting a matter, Nexus checks automatically whether any of the parties involved have appeared in prior matters of the same firm. The system normalises names (accents stripped, corporate suffixes, honorifics removed), applies exact, substring and approximate matching (trigrams), and ranks results by match type and similarity percentage. Each matter has its own Parties tab where clients, opposing parties, witnesses and experts are registered; on adding a new matter the check runs against the firm's full history and alerts on overlap.

08 · MATTER COMMAND CENTER

The matter as a control surface.

The matter is the heart of the firm. In Nexus each matter is now a full command center with six integrated tabs — Corpus (ingest and manage documents in PDF, audio, video), Queries (RAG over the matter's own corpus), Drafting (writing assistant contextualised to the file), Docs (document listing with status and text download), Parties (registry plus integrated conflict check) and Control (per-matter inbox: linked analyses, pending reviews, unverified evidence, overdue deadlines). Analyses generated from the main panel can be linked to a matter; from then on their deadlines, evidence and reviews appear automatically in the matter's Control tab.

09 · GLOBAL CONTROL INBOX

Everything that needs attention, one screen.

The Inbox is the firm's command view: everything requiring attention on a single screen, regardless of which matter it belongs to. Five live counters: Under review (pending human approval), Unverified (evidence extracted but not yet validated), Hallucinations (statements flagged as potential AI error), Overdue deadlines (critical dates already passed without recorded compliance) and Next 7 days (deadlines this week). Each item deep-links to the matching analysis or matter. The Inbox empties when the firm has done its work — every review approved, every piece of evidence verified, every deadline resolved.

WHO NEXUS IS FOR

Built for the actors who answer to a regulator.

Nexus is the operating layer for any practice that cannot afford a black-box AI answer reaching a partner's signature, an audit committee or a court.

Law firms

Firms that need to work with AI without giving up professional control or deontological responsibility.

Corporate legal departments

Legal teams that must demonstrate to internal audit or regulators that their AI-assisted analyses are traceable, reviewed and defensible.

International practices

Firms with cross-border practice that need consistent analysis across multiple jurisdictions under a single system.

Individual lawyers

Solo practitioners who want the same toolkit as a magic-circle firm without the infrastructure of one.

TECHNICAL ARCHITECTURE

What makes all of this reliable.

Zero Retention (source documents are processed in volatile memory and discarded after issuance; only the opinion, evidence and deadlines persist), an LLM chain with automatic fallback for availability without sacrificing quality, the Node A + Node B + Node C architecture (primary analysis, adversarial audit, risk red team — each node swappable for any AI provider), strict multi-jurisdictional sandboxing (Spain, Colombia, Switzerland, international) and row-level security on every row in the database (a user can never see another firm's data — no exceptions).

NEXUS LEGAL

See the operating system in action.

Request a 30-minute technical demo to walk through, on a live matter, the defence dossier, the global control inbox and AI Act traceability — end to end, from ingest to signature.

NEXUS LEGAL · LAW FIRM OPERATING SYSTEM · AI ACT COMPLIANT · MULTI-JURISDICTIONAL