Self-Hosted Legal AI Software Inside Your Firm's Tenant
Legal AI software from NeuralChainAI runs inside your firm's own tenant and handles contract review, contract drafting, legal research, deposition summaries and chat over matter files. We deploy it as private AI for law firms, with matter content, embeddings and audit logs kept in the firm's environment. That gives your risk team one documented data path for outside counsel guidelines (OCGs), NDA AI-use clauses and ABA Formal Opinion 512.
What SMB and Mid-Market Law Firms Get from Private Legal AI Software
Six outcomes for 30–300 lawyer firms that run legal AI inside their own tenant.
Matter file ingestion
PDFs (scanned and native), Word, Excel, contract redlines, deposition transcripts, court filings, OCR'd correspondence and structured exhibits, parsed so tables, footnotes and exhibits stay attached to their context.
Clause-library calibration
The firm's market positions, preferred clauses, and matter-type playbooks loaded into the system. Anomaly detection flags deviations during review; the firm's preferred language surfaces automatically during generation.
Citation enforcement
Clause suggestions, review flags, redlines and answers link to the source paragraph in the firm's matter corpus, and anything without a source is marked as model-generated. Partners, clients and auditors can trace each one back.
A data path built for OCG and bar review
Matter content stays inside the firm's tenant, with self-hosted models for confidential work. That gives the firm a short, documented data path for ABA Formal Opinion 512 risk evaluations, OCG AI-use disclosures, NDA AI clauses and guidance from the SRA, the Federation of Law Societies of Canada and the Law Council of Australia.
BYO-LLM routing
OpenAI, Anthropic, or Gemini via the firm's enterprise contract for general work; self-hosted Llama, Mistral, or Qwen for matter-confidential workflows. Same UX for the lawyer; different model on the back end based on the matter.
Per-matter access controls
Each matter gets its own access policy mapped to the firm's SSO group membership. Ethical screens, matter walls, and folder-level permissions survive into the AI layer. Every query, retrieval, and response logged for audit.
Why SMB and Mid-Market Firms Choose Self-Hosted Legal AI Software
Harvey AI, Legora, Hebbia, Kira (Litera), Luminance, eBrevia, Robin AI, Spellbook, LexisNexis Protégé and Thomson Reuters CoCounsel offer contract review, drafting, legal research and matter chat as hosted services, with processing in the vendor's cloud. SMB and mid-market firms choose a self-hosted deployment when engagement letters, client guidelines or confidentiality duties call for matter content to stay in the firm's own environment:
A private legal AI deployment inside the firm's tenant.
Contract review, drafting, legal research and matter chat in one deployment, sized for SMB and mid-market firms. Confidential matters run on self-hosted models, so matter content stays inside the firm's perimeter and the firm has one documented data path to show clients and reviewers.
The 8 Capabilities We Build
The eight pieces of the firm's legal AI software stack, from matter document ingestion through to grounded answers with inline citations to the source paragraph.
Matter file ingestion for every document type
PDFs (scanned and native), Word, PowerPoint, Excel, contract redlines, deposition transcripts, court filings, emails, OCR'd correspondence, structured exhibits, and tables with footnotes, each parsed and chunked so its context stays intact.
Embeddings generated inside the firm's perimeter
Choose the embedding model: OpenAI text-embedding-3 through the firm's enterprise contract, Cohere or Voyage if licensing fits, or BGE-M3, E5-Mistral, Qwen3-Embedding or a domain-tuned variant self-hosted inside the firm's tenant. For matter-confidential content, the self-hosted option keeps the whole embedding pass behind the firm's perimeter.
Self-hosted vector store sized for the firm's matter corpus
pgvector (when Postgres is the right answer), Qdrant, Weaviate, or Milvus deployed in the firm's tenant. Tuned for legal-document structure: long-form contracts, multi-section depositions, dense market-terms playbooks, cross-matter citation chains and matter-type templates.
Retrieval calibrated to the firm's playbook
Hybrid search (BM25 + vector), a cross-encoder reranker, query rewriting and multi-query fanout where it pays off. We calibrate retrieval against the firm's market-terms playbook, so deviations surface during review and the firm's preferred language surfaces during generation.
Grounded answers with paragraph-level citations
Every clause suggestion, review flag, redline, and chat answer links back to the source paragraph in the firm's clause library or matter corpus. A suggestion that doesn't map to a source is flagged as model-generated rather than playbook-sourced; the drafting attorney sees that distinction in the UX. The review burden shifts from “verify everything” to “verify the model-generated suggestions specifically.”
BYO-LLM: vendor cloud for general work, self-hosted for confidential matters
Plug in OpenAI, Anthropic, Gemini, or AWS Bedrock via the firm's enterprise contract for general / non-matter work. Self-hosted Llama, Mistral, or Qwen via vLLM, SGLang, or Ollama for matter-confidential workflows that can't touch a vendor API. Same UX for the lawyer; different model on the back end based on the matter's confidentiality posture.
Air-gapped, on-prem, or in the firm's existing VPC
The full stack (ingestion, embeddings, vector store, generation and audit logging) runs in the firm's AWS or Azure account, on its own servers, or in a firm-controlled tenant in the region it chooses, such as Toronto, London or Sydney. For air-gapped work, the whole data path runs on an isolated network.
Per-matter access control and full audit log
Each matter gets its own access policy mapped to the firm's SSO group membership. Ethical screens, matter walls, and folder-level permissions survive into the AI layer. Every query, retrieval, clause suggestion, and model response is logged for OCG, ABA Op 512, SRA, Federation, and Law Council review. The firm gets a destruction certificate at matter close.
Talk to a Private Legal AI Expert
Bring us the firm's matter mix (transactional, commercial, employment, regulated-client), the engagement-letter and OCG terms the firm works under, and the workflows you want AI to handle. We'll walk through the deployment shape that fits, a rollout plan against our 4–6 week target, and a directional cost for a firm of your size.
Book a Strategy Session →When to Choose Self-Hosted Legal AI over Vendor Cloud
Harvey AI, Legora, Hebbia, Kira (Litera), Luminance, eBrevia, Robin AI, Spellbook, LexisNexis Protégé and Thomson Reuters CoCounsel cover the main legal AI workflows as hosted services, and they suit large firms whose clients accept vendor-cloud processing. SMB and mid-market firms (30–300 lawyers, mixed confidentiality posture) choose a private deployment for these reasons:
A private legal AI deployment inside the firm's tenant covers review, drafting, research and matter chat in one calibrated stack. The firm pays once for the build, then hosting and an optional flat retainer, and the firm owns the stack.
Frequently Asked Questions on Legal AI Software
The workflows are similar: contract review, contract drafting, legal research, deposition summaries and matter chat all run on retrieval plus an LLM. The main difference is where processing happens. Vendor platforms process matter content in the vendor's cloud, while a private deployment runs inside the firm's tenant. That location shapes how the firm answers OCG questionnaires, NDA AI-use clauses and ABA Formal Opinion 512 risk evaluations.
Contract review for incoming paper: clause extraction, market-terms comparison, anomaly detection against the firm's playbook and disclosure-schedule reconciliation. Contract drafting for outgoing paper: first drafts, clause-library suggestions, redlines and matter-type templates. Legal research across the firm's prior work product, internal memos and matter document sets. It also summarizes depositions and answers questions over the firm's full matter corpus. We build custom workflows for specific practice areas too, such as M&A diligence, personal injury medical chronologies and demand letters.
It gives the firm a simple, documented data path. With self-hosted embeddings and a self-hosted model, matter content stays inside the firm's tenant and is processed only on systems the firm controls. The firm's ethics and risk team can use that as the basis for its ABA Formal Opinion 512 risk evaluation, OCG AI-use disclosures, NDA AI clauses and the guidance of its state bar, the SRA, the Federation of Law Societies of Canada or the Law Council of Australia. The compliance decision stays with the firm's counsel, and we supply the architecture and audit documentation they need.
Harvey AI and Hebbia quote each firm through their sales teams, so a fair comparison starts from the quote your firm receives. A private deployment is a one-time build plus hosting (GPUs or cloud compute) and an optional flat managed retainer, so the cost stays steady as the firm adds lawyers. The firm also gets review, drafting, research and matter chat in one calibrated deployment. A strategy session puts the two side by side for your firm's headcount and workload.
Yes to both. We deploy into the firm's existing AWS, Azure or on-premise environment, or into a firm-controlled tenant we provision in the region the firm prefers, such as Toronto, London or Sydney. For air-gapped or regulated work, we pair the pipeline with self-hosted embedding models and self-hosted LLM serving (vLLM, SGLang or Ollama on GPUs inside the perimeter), and the full data path runs on the isolated network.
Our target is 4–6 weeks from kickoff to lawyers running workflows in production. Weeks 1–2 cover tenant deployment, SSO and audit logging. Weeks 2–3 cover corpus ingestion (engagement letters, NDAs, M&A agreements, employment, commercial and licensing documents). Weeks 3–4 cover retrieval tuning and playbook calibration to the firm's market positions, and from week 4 lawyers run review and drafting workflows. We confirm the schedule once we have seen the firm's corpus. The managed engagement covers ongoing operation (model updates, connector additions, version upgrades and quarterly playbook reviews). The firm's IT team authorizes the tenant on day one and confirms audit-log retention, and we handle everything in between.
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Learn more →AI Transformation Workshop
Half-day strategy workshop to map the firm's matter mix, embedding choice, LLM routing, and private legal AI deployment shape.
Book a workshop →AI Strategy Session
30-minute scoping call. We'll talk through the firm's matter mix, document types, and confidentiality posture, then sketch the right private legal AI deployment.
Book a session →Legal AI Solutions
Custom AI and ML solutions for law firms and legal services teams.
See legal AI solutions →Ready to Deploy Private AI for the Firm?
A 30-minute strategy session. We'll scope the deployment for the firm's matter mix, contractual terms and workflows, and give a directional read on the cost for a firm of your size.