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A social roleplaying platform that uses AI to generate unique stories
Hidden Door is a game technology studio focused on using machine learning and narrative AI to create interactive, social storytelling experiences. Founded in 2020 by Hilary Mason and Matt Brandwein, the company describes its core product as a social roleplaying platform that can transform fictional worlds into interactive narrative experiences. Rather than functioning like a conventional chatbot or standalone writing assistant, Hidden Door is designed around collaborative play, where players take on characters, make choices, and shape stories with friends.
Its technology combines proprietary language and art models with story systems designed to generate responsive characters, locations, items, plots, and other narrative elements. Hidden Door describes the experience as combining the feel of tabletop roleplaying with interactive graphic novels and an AI-powered narrator or “AI Dungeon Master.”
The company also positions the platform as a potential technology layer for creators and IP owners. Its partnership model allows creators to bring existing fictional worlds to Hidden Door, engage their fan communities, earn revenue through licensing arrangements, and retain control over their intellectual property. Hidden Door states that it does not train LLMs on partner content.
Hidden Door’s official site does not publish standard subscription tiers or starting prices; commercial partnership arrangements appear to be handled directly with creators and IP owners.
Pricing last verified: Sep 8, 2026
AI platform for collaborative, adaptive story-driven roleplaying
Hidden Door stands out by treating generative AI as a game system rather than simply a chatbot. Its strongest appeal is collaborative storytelling across fictional worlds, with AI handling narrative elements dynamically. It is particularly interesting for game creators, storytellers, and IP owners, although its specialized focus and limited public pricing make it less suitable for general AI users.
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| Hidden Door AI (this tool) | AI Dungeon | Character AI | NovelAI | |
|---|---|---|---|---|
| Starting Price | — | USD 14.99 | — | $ 10 |
| Free Plan | Yes | Yes | — | — |
| Primary Use Case | AI-powered roleplaying | Interactive AI Storytelling | — | AI Anime Art & Story Generation |
| Best For | Game Designers, Authors, Storytellers, Developers, Creators, Gamers, Publishers,… | Writers and authors, Creative professionals, Interactive fiction creators,… | — | Anime artists, Writers, Storytellers, Content creators, Game designers,… |
| Community Rating | — | 3.6/5 | — | — |
| Our Rating | — | — | — | — |
| Profile | View → | View → | View → | View → |
✔ Research verified by Intelligence Insights (Sakshi Purna) · September 2026
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