LexVault is an AI that answers legal questions, analyzes contracts, and drafts documents — grounded in real law, verified before it reaches you, with a full audit trail. Runs entirely on your hardware. No data sent to OpenAI, ever.
Every component runs on-premise. Disconnect the ethernet cable and it still works.
No OpenAI, no Azure, no AWS. The LLM, embeddings, reranker, and translation all run locally on your hardware.
Deployed on a Mac Studio that fits on a desk. No server room, no IT department. All models run locally on Apple Silicon. Silent and always on.
Neural translation runs locally in milliseconds. Ask in English, search in German or Slovak statute text.
New case law and statute updates delivered monthly via secure USB drive. Plug in, wait 30 seconds, done. Your legal database stays current without ever connecting to the internet.
Five steps, fully on-premise. First results stream within seconds.
If the target jurisdiction uses a different language, the system translates the query. "tenant rights" becomes "Rechte der Mieter" for Austrian law.
Neural Translation · 450+ Languages · ~350msSearches statutes and case law using semantic meaning and exact legal terms simultaneously. Results merged and ranked by relevance.
Hybrid Vector Search · Semantic + Exact MatchA cross-encoder reads each query-document pair and scores relevance. Only results above threshold pass. Noise filtered out.
Cross-Encoder Reranker · GPU-acceleratedThe AI reads the relevant law and writes a grounded answer citing specific statutes and decisions. Temperature zero — facts only, no creativity.
Open-Source LLM · Apple Silicon · streamingAn independent LLM judge reviews the full response against sources at temperature zero. Unsupported claims are automatically rewritten grounded in source text. Claims that fail re-verification are removed.
LLM Judge · temp 0 · regenerate-or-removeResearch, draft, analyze, and export — all in one platform, all on your hardware.
Ask questions in any language. The AI searches statutes and case law, cites specific sections, and verifies every claim before responding. Upload PDF, DOCX, or TXT files for context.
Choose from templates (NDA, employment, service agreement) or describe your situation. The AI drafts a full document grounded in applicable law. Regenerate individual sections.
Upload a contract and get a clause-by-clause risk assessment. Each clause rated by importance with specific statute references. Large documents automatically chunked and analyzed.
Export research conversations, drafted contracts, and document analyses as professionally formatted DOCX or PDF files. Ready for client delivery.
Each lawyer gets their own login and conversation history. Admin dashboard with invite system, role management, usage stats, and seat control. Like ChatGPT Team, but on-premise.
Run parallel multi-source investigations across jurisdictions. Progressive streaming results. Automatic document chunking for large files. Cancel anytime.
When regulators ask "how did the AI reach that conclusion?", you have the answer. No other legal AI product offers this.
Every claim the AI makes is linked to the specific statute section or court decision it came from. Full source text attached — not just a citation number.
Before any response reaches the user, an independent LLM judge reviews the full answer against its sources at temperature zero. Unsupported claims are automatically rewritten grounded in source text. Claims that fail re-verification are removed entirely.
Every interaction recorded: model used, response time, sources searched, confidence score, verification result per claim (Verified, Flagged, Rewritten, Removed). Searchable, exportable, always available.
Sample audit entry: “The AI cited GmbH-Gesetz § 6 — Judge verdict: Verified — full source text: 1,847 chars — model: open-source LLM (temp 0) — response time: 1.2s — logged 2026-02-25 14:32:07”
Open-source models, runs entirely on Apple Silicon, zero cloud services. End-to-end pipeline completes in under 15 seconds with response streaming from ~3s.
| Layer | Technology | Details |
|---|---|---|
| LLM | Open-Source Language Model | Streaming output, temperature zero for legal research |
| Embeddings | Multilingual Embeddings | Semantic search across 100+ languages |
| Reranker | Cross-Encoder Reranker | GPU-accelerated relevance scoring (~1s) |
| Translation | Neural Translation Engine | 450+ languages, ~350ms per query |
| Verification | LLM Judge (temp 0) | Reviews full response against sources, regenerates or removes unsupported claims |
| Search | Hybrid Vector Search | Semantic + exact term matching, GPU-accelerated |
| Hardware | Mac Studio (Apple Silicon) | Silent, desk-sized, 64–512 GB unified memory |
| Deployment | Pre-Installed Appliance | Plug in and go, no configuration needed |
Pick the jurisdictions you need. Our multilingual pipeline supports 450+ languages — if a country publishes its law, we can add it.
| Jurisdiction | Coverage | Status |
|---|---|---|
| US Federal | Statutes (USC) + Regulations (CFR) | Available |
| US States | State statutes & regulations (per state) | On request |
| Austria | Core statutes & codes | Available |
| Slovakia | Core statutes & codes | Available |
| EU | Regulations, Directives & CJEU decisions | On request |
| Germany | Federal statutes & codes | Available |
| Romania | Core statutes & codes | Available |
| UK | Primary legislation & case law | On request |
| China | National laws & State Council regulations | On request |
| Others | Any jurisdiction with publicly available law | On request |
Every other legal AI sends your data to the cloud. LexVault doesn't.
| Harvey AI | Westlaw CoCounsel | Lexis+ AI | AI:ssociate | LexVault | |
|---|---|---|---|---|---|
| Fully Offline / On-Premise | — | — | — | — | Yes |
| Compliance Audit Trail | — | — | — | — | Yes |
| LLM Judge Verification | — | — | — | — | Yes |
| AI Legal Research | Yes | Add-on | Add-on | Yes | Yes |
| Contract Drafting | Yes | — | Basic | — | Yes |
| Document Analysis | Yes | — | Basic | Yes | Yes |
| Multi-Jurisdiction | — | Per product | Per product | — | Yes |
| Cross-Language Search | — | — | — | — | Yes |
| DACH / CEE Statutes | — | Limited | AT only | AT only | US, DE, AT, SK, RO |
| No Cloud / No API Costs | — | — | — | — | Yes |
| Cost / Lawyer / Month | $1,200+ | $225–500 | €115–450 | €39–69 | from €99 |
AI:ssociate is cheaper per seat but cloud-only, Austria-only, and lacks offline capability, audit trail, and multi-jurisdiction support. LexVault costs more per seat but includes unlimited queries with zero ongoing API costs — the AI runs on your hardware.