A private AI assistant handles email triage, personal CRM, daily briefings, meeting action items, and knowledge base queries — running on your own hardware for $5–20/month in API fees. Your files and configuration stay on your machine; prompts go to your chosen AI provider (OpenAI, Anthropic) but aren't stored or used for training. Professional setup is a one-time fee, or you can DIY it for free if you're technical.