CaseFile
An on-phone, offline-first AI knowledge assistant for lawyers, journalists and doctors that lets them search across their own notes, PDFs and emails with natural-language questions, while keeping every byte on the device.
Solo and small-firm professionals (lawyers, journalists, doctors) handling sensitive client or source material
- On-device semantic search across locally indexed PDFs, notes and email archives, no cloud round-trip
- Citations that point back to the exact paragraph in the source document, with offline viewing
- Quick 'add to file' capture from email, voice memo or photo of a printed page, all stored locally
- End-to-end encrypted sync only between a user's own devices, never to a vendor server
The paper proves a 1.7B-parameter phone model can do multi-hop reasoning over a personal knowledge graph; this finally makes a genuinely private, offline-capable professional assistant shippable on a normal phone.
Clear demand signal: a comparison roundup of '9 Best Private AI Tools for Lawyers' exists as a category, and Elephas reports AI can cut document review time by 60%; multiple active products target this exact pain point across legal, medical, and knowledge work.9 Best Private AI Tools for Lawyers in 2026 (Local & Offline Options) ↗The 9 Best AI Legal Tech Platforms in 2025: Complete Comparison Guide ↗
Crowded with near-identical pitches: Elephas ($19/mo, Mac/iPhone/iPad, local, per-matter 'Super Brain', citations) is essentially CaseFile on Apple; LocalDocuVault, TransAI legal note taker, NevMind AI, and GPT4All already cover offline RAG over local files; the differentiator (Android + journalist/doctor cross-segment) is thin.9 Best Private AI Tools for Lawyers in 2026 (Local & Offline Options) ↗LocalDocuVault - Your Fully Offline Private AI Document Assistant ↗Offline AI Legal Note Taker for Attorneys & Law Firms ↗NevMind AI - Offline RAG Knowledge Base ↗
Demonstrated willingness to pay across tiers: Elephas from $19/mo for solos, Paxton AI $99+/mo, Lexis+ AI $171/mo, Westlaw AI $194/mo, CoCounsel $500+/mo; $19/mo solo tier proves small-firm buyers convert, but the market is bifurcated and crowded.9 Best Private AI Tools for Lawyers in 2026 (Local & Offline Options) ↗10 Best AI Tools for Lawyers in 2025 (Features & Pricing) ↗
Confidentiality duties for lawyers, doctors and journalists are permanent.
Technically buildable today: an open-source 'offline-rag-android' RAG app exists on GitHub and the SmartRAG mobile paper confirms on-device multi-hop reasoning is achievable, but shipping a 1.7B model with quality multi-format ingestion, citations, and Android+iOS parity remains substantial engineering work.nicolas-raoul/offline-rag-android - GitHub ↗How to Implement On Device RAG in Mobile Apps ↗