SilicIA

Private AI assistant for macOS

Local AI. Web context. No cloud.

SilicIA is a native macOS application powered by local large language models and Apple Silicon. Chat with an on-device AI, search the web and get synthesised summaries with cited sources, or ask questions about your PDFs and images — all processed locally, with no data ever sent to an external server.

Explore features How it works Build Support
AI inference
100% on-device (local LLM)
Web search
DuckDuckGo + AI synthesis
Document analysis
PDF & images, page citations
Storage
Local chat history (SwiftData)

Features

  • Local LLM chat — multi-turn conversations processed entirely on your Mac, no internet required.
  • Web intelligence — live DuckDuckGo search with AI-synthesised summaries and cited source links.
  • Document analysis — drag-and-drop PDFs or images; get answers with page-precise citations.
  • Combined context — blend web results and documents in a single conversation.
  • Privacy by design — no account, no telemetry, no cloud inference. Your data stays on your device.
  • Multi-language — English and French interfaces.
  • Persistent history — conversations stored locally with SwiftData.

How it works

  • Chat: your prompt is sent to a local LLM — no network call required.
  • Search: query DuckDuckGo, scrape top results, feed them as context to the local model.
  • Documents: PDF or image content is chunked, ranked, and injected as RAG context.
  • Answer: the model reasons over the combined context and responds with cited sources.

Technical highlights

  • SwiftUI — native macOS interface, optimised for Apple Silicon.
  • Local LLM — on-device inference via Apple's Foundation Models framework.
  • RAG pipeline — chunking, ranking, and retrieval-augmented generation.
  • PDFKit — PDF parsing and page-level citation extraction.
  • SwiftData — persistent local chat and PDF conversation history.

Requirements & build

  • Requirements: macOS 26+, Apple Silicon.
  • Clone: git clone https://github.com/Eddy-Barraud/SilicIA.git
  • Open: open SilicIA.xcodeproj
  • Build: Xcode ⌘B (or ⌘R to run).