Desktop tools for Game Masters and solo adventurers
Bestiary Companion handles AI-powered monsters and art. SandBox Generator Companion rebuilds the SandBox Generator manual as living hex-crawl workflows.
Everything runs locally so you can prep, improvise, and export without worrying about bandwidth, licensing, or losing reference books mid-session.
- OFFOffline by design
- PDFPDF fidelity
- ARTLocal art tooling
- GPUHardware aware
Featured tools
Why GMs choose Companions Keep
Privacy-First AI
Your creations stay on your machine. No cloud services, no data collection, no monthly fees.
Hardware Flexibility
Works on any desktop. GPU acceleration when available, CPU fallback for universal compatibility.
Professional Output
Generate publication-ready stat blocks, prep logs, and exports in minutes.
Technical Architecture
Frontend
Electron + TypeScript + HTML/CSS
AI Backend
Python + ONNX + Stable Diffusion
Data Layer
Local JSON + Source PDF Extraction
Built with modern web technologies wrapped in a desktop application. The AI stack powers Bestiary Companion art workflows, while the SandBox Generator Companion focuses on deterministic table execution drawn from the reference manual.
Early access programs
Join the newsletter to test upcoming Bestiary Companion releases and the SandBox Generator Companion alpha modules.