NativeCluster offers Legal Box, a private on‑device AI assistant designed for law firms to draft, review, and manage legal documents without transmitting any client data to the cloud. The tool leverages locally stored templates, precedents, and clause libraries to generate first drafts, summarize hundreds of documents, and perform redline comparisons, all while maintaining full version history and searchable, end‑to‑end document archives. It integrates directly into Microsoft Word and supports OCR for scanned contracts, ensuring confidential workflows stay entirely on the user’s device.
Funding
Funding not disclosed
Founders
Product
Problem
Law firms must keep client documents confidential, but most AI drafting and review tools operate in cloud services, requiring privileged files to be transmitted to external servers. This creates a structural conflict with professional confidentiality obligations and limits firms' ability to adopt AI assistance.
Solution
Legal Box, NativeCluster’s on‑device AI assistant, runs entirely on a firm’s own Mac computers, eliminating any need to send client data to the cloud. The application indexes a firm’s contracts, templates, and precedents locally, enabling users to draft new agreements, review existing documents, and extract information without leaving the device. All prompts are processed by an on‑device language model, and the system maintains full version history, searchable matter scopes, and citation‑backed answers. Integration with Microsoft Word provides a familiar editing environment, while built‑in OCR and redlining capabilities support scanned contracts and document comparison. Because the software operates offline after installation, firms gain unlimited, private AI assistance without per‑call fees or external data exposure.
Target Audience
Legal Box is targeted at law firms and corporate legal departments that require confidential handling of contracts, letters, and memos while seeking AI‑driven drafting and review capabilities.
Features
- On‑device large language model that processes every request locally on macOS Apple Silicon, ensuring no client data leaves the device
- Draft generation from firm‑specific templates and precedents with one‑click workflow re‑execution
- Document review tools that summarize and extract data across multiple files into a tabular format, each cell citing the source page
- Full‑text search and matter‑scoped project organization with version‑controlled document storage and immutable originals
- Built‑in OCR to read scanned contracts and exhibits, enabling redlining and comparison of any two document versions
- Microsoft Word add‑in that runs locally, providing AI assistance directly within the editor without external dependencies
- Private knowledge bases for precedents, playbooks, and clause libraries that the AI references to flag deviations during drafting or review