Fifth Door key facts
as of Oct 2026- Developer of browser-based interactive experiences designed for the rapid deployment of digital game formats.
- Fifth Door is valued at approximately $104.0M as of Oct 2026 (last reported valuation).
- It has raised $20.5M; the latest was Seed Round ($20.0M) in Nov 2025.
- Notable investors include Y Combinator, Rebel Fund, Felicis, Offline Ventures, Garry Tan — 8 tracked in total.
- Status: Privately Held (backing).
Fifth Door's last reported valuation, Nov 2025. Nothing priced has surfaced since.
- ·Watch Fifth Door: the Monday email on marks, rounds and moves
Fifth Door funding rounds
No funding rounds for Fifth Door are on record yet — either the company hasn't raised institutional capital, or the raise hasn't surfaced in our sources.
Fifth Door valuation
Fifth Door's last reported valuation was $104 million in Nov 2025. No priced round, secondary trade or fund mark has surfaced since.
Fifth Door investors
8 investors are on record for Fifth Door, including Y Combinator, Rebel Fund, Felicis and Offline Ventures.
About Fifth Door
Developer of browser-based interactive experiences designed for the rapid deployment of digital game formats. The company's platform uses artificial intelligence (AI) to automatically convert existing gameplay concepts into web-accessible formats, providing customizable interfaces, player interaction tools, and real-time hosting capabilities, enabling independent creators and gaming communities to publish, manage, and share their game content without requiring advanced technical skills or infrastructure setup.
- Sector
- Information Technology
- HQ
- San Francisco, CA, United States
- Founded
- 2025
- Website
- fifthdoor.com/
- Ownership
- Privately Held (backing)
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