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Ghost — Privacy-First AI Desktop Assistant

v0.14.2 · Tauri v2 + Rust + React/TS/Vite

What Is Ghost

Ghost is a local-first AI desktop assistant that keeps your data on your machine. It combines full-text search (FTS5, <5ms), semantic vector search (Candle embeddings, all-MiniLM-L6-v2 384D), and a ReAct agent engine with grammar-constrained tool calling — all running without cloud dependencies.

Core stack:

  • Backend: 20,688 lines of Rust — Tauri v2, rusqlite, Candle ML
  • Frontend: 25 files — React + TypeScript + Vite
  • Local AI: Qwen2.5-Instruct GGUF (0.5B–7B parameter models)
  • Search: Hybrid FTS5 + semantic vector, sub-5ms text queries
  • Agent: ReAct engine with grammar-constrained tool calling
  • Protocols (2026 stack): MCP Server+Client, AG-UI, A2UI, A2A, Skills
  • MCP Catalog: 30+ curated servers + 6,000+ from registry
  • File Processing: Watcher + text extraction for PDF, DOCX, 50+ formats
  • Distribution: 5+ releases, CI/CD GitHub Actions (Windows/macOS/Linux)

Market

Metric Value
AI Desktop Assistant TAM (2025) $3.35B
Projected TAM (2030) $24.53B
CAGR ~39%

Competitor landscape:

Competitor Status Ghost Advantage
Rewind AI Dead (pivoted to Limitless, lost desktop focus) Ghost is actively maintained, desktop-first
Windows Recall Privacy backlash, enterprise distrust Ghost is 100% local, zero telemetry
Raycast Mac-only, no local AI Ghost is cross-platform, runs local models
Notion AI / Copilot Cloud-dependent, data leaves your machine Ghost keeps everything local

Why Ghost wins: The only cross-platform, privacy-first desktop assistant with local LLM inference, hybrid search, and the full 2026 agent protocol stack (MCP, A2A, AG-UI). No data leaves the machine.

Pricing

Tier Price Features
Free $0 Local AI, FTS5 search, file watcher, basic MCP tools
Pro $8/mo Semantic search, full MCP catalog, advanced agent skills, priority updates
Teams $15/user/mo Shared knowledge bases, team MCP servers, admin controls, SSO

Monetization via ghost-pro crate — feature gating at the Rust level.

Current Status

  • Version: 0.14.2
  • Maturity: Alpha — functional for personal use, not yet monetized
  • Build: cargo build --release
  • Test: cargo test
  • CI/CD: GitHub Actions multiplatform (Windows, macOS, Linux)
  • Releases: 5+ published

Blockers to Revenue

  1. Stripe integration — No payment processing. Need Stripe Checkout + Customer Portal for Pro/Teams.
  2. License key validation — No mechanism to gate Pro features. Need license key generation + validation in ghost-pro crate.
  3. App store distribution — Not yet on any store. Need code signing, notarization (macOS), and Microsoft Store submission.
  4. Landing page — No marketing site. Need ghost.quirozai.com or similar.

Key Metrics to Track

  • Downloads per release (GitHub Releases + app stores)
  • Free → Pro conversion rate (target: 5–8%)
  • MRR from Pro + Teams subscriptions
  • DAU / retention (local telemetry opt-in only)