Key facts
- Fifth Door’s last known valuation is $104.0M (Nov 2025).
- 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).
- ·The complete investor list — 8 names
- ·Watchlist + deal alerts for Fifth Door
- ·The full record, as it builds
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.
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)
Fifth Door doesn't have a composite mark yet — a PA Mark is published once enough pricing inputs exist (trade prints, fund marks, round prices). The rest of the record below builds toward it.
Recorded secondary trades
No secondary trades in Fifth Door shares have been recorded yet. When a print lands — third-party, direct report, or platform — it appears here with structure, source, and price.
Institutional fund marks
No SEC-registered fund has reported a fair-value mark on Fifth Door in its N-PORT filings yet. We sweep new filings monthly.