Sanctum

Sanctum is a desktop private AI assistant for individuals who want to run open-source large language models locally with strong on-device privacy controls.

Key capabilities include:

• Local LLM execution on Mac (macOS 12+) and Windows (10+), with no internet required after the initial model download
• Hugging Face GGUF access, including compatibility checks and the ability to download and switch between thousands of models
• Sanctum Vault for secure local storage, with chat history and files stored in an encrypted database using AES-256
• Private PDF chat and analysis, including file uploads processed on-device

Pricing: Freemium, with paid plans starting at $8/month.

What makes it notable is its privacy-first, on-device architecture paired with direct GGUF model browsing and switching, designed to keep sensitive prompts, documents, and conversation history off the cloud.