# Hidden Door: Information technology & services, New York, United States

> Hidden Door: Hidden Door is a game technology studio founded in 2020, based in Brooklyn, New York. Based in New York, United States. Founded 2020.

Source: https://millionrounds.com/startup/hidden-door (Millionrounds; every figure on the page links to its filing or article)

United States · [Information technology & services startup](https://millionrounds.com/companies)

# Hidden Door

Hidden Door is a game technology studio founded in 2020, based in Brooklyn, New York.

Funding reported Last round: Seed

Information technology & services New York, United States

Company summary

- **Founded:** 2020 6 years old
- **Team:** 26 11 to 50 people
- **Funding reported:** $9.0M in dollars
- **Last round:** Seed Jul 2022

How sure we are

- ✓ **Listed** We know it exists and what it does
- 2 **Funding reported** A company dataset reports a raise
- 3 **Observed** A filing or a dated announcement confirms a round

No round for Hidden Door has been confirmed by a filing or an announcement yet, so nothing here counts toward an investor's record. [How we decide](https://millionrounds.com/methodology)

## About Hidden Door

Hidden Door is a game technology studio founded in 2020, based in Brooklyn, New York.

The company specializes in a proprietary generative AI platform that transforms existing works of fiction into online social roleplaying games. This innovative approach creates an "infinite narrative multiverse" where fans can engage and play together in their favorite fictional worlds. The platform, often likened to "Roblox meets D&D," allows players to conjure personalized characters, improvise adventures, and explore open story worlds. It utilizes a custom narrative game engine powered by Natural Language Processing and is designed to adapt any work of fiction into a playable format. Hidden Door also plans to launch a marketplace for creators to easily adapt their works for the platform and offers APIs for developers to build interactive experiences. The company emphasizes safety and content standards, ensuring a secure environment for players and creators alike.

## What company datasets say Hidden Door raised

Funding, as reported

Reported in all **$9.0M** in dollars

Rounds **2**

Last round **Seed**

Last round size **$7.0M**

Last round date **Jul 2022**

Investors listed **7**

## Founders and team

From Hidden Door's own website: 3 founders.

**Hilary Mason** Co-founder, CEO

**Joshua Schacter** founder, del.icio.us

**Matt Brandwein** Co-founder, Product

## On 2 portfolio pages

Investors who name them

- [Homebrew](https://millionrounds.com/fund/homebrew)
- [Betaworks](https://millionrounds.com/fund/betaworks)

Each firm lists Hidden Door on its own website. That is the firm's claim, a weaker thing than a round we watched, but a named source.

## The company, in detail

What they build

Known for

libraries player-driven narratives cloud fan engagement platforms information technology & services ai narrative generation ai platform roleplay gaming mmo social gaming role-playing game co-creative storytelling archives b2c services video game development

Built with from their website

PWA Google Workspace CloudFlare Viewport Meta Render Google Meet Eventbrite Google Font API Mobile Friendly Open Graph

+7 more

Slack HTTP/3 Segment Discord Google Search Console Astro Gmail

- **Sector:** Information technology & services
- **Industry code:** NAICS 519, 513210, SIC 7375
- **Region:** New York
- **Full record:** [Every detail in the company directory](https://millionrounds.com/directory/hidden-door)

## Information technology & services in United States

Startups like it

- [**Databricks** San Francisco · founded 2013 *Raised*](https://millionrounds.com/company/databricks)
- [**Waymo** Mountain View · founded 2009 *Raised*](https://millionrounds.com/company/waymo)
- [**Crusoe** Denver · founded 2018 *Raised*](https://millionrounds.com/company/crusoe)
- [**Cursor** San Francisco · founded 2017 *Raised*](https://millionrounds.com/company/cursor)
- [**Thinking Machines Lab** San Francisco *Raised*](https://millionrounds.com/company/thinking-machines-lab)
- [**Cognition** San Francisco *Raised*](https://millionrounds.com/company/cognition)
- [**Polymarket** New York · founded 2020 *Raised*](https://millionrounds.com/company/polymarket)
- [**Harvey** San Francisco · founded 2022 *Raised*](https://millionrounds.com/company/harvey)

## Is this your company?

Add your raise, your deck and your story, and put Hidden Door in front of investors. Or tell us what we have wrong.

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