New architectures & efficiency · San Francisco, US · founded 2025
Fundamental: who founded it, who funds it
Fundamental is a San Francisco AI architecture lab founded in 2025 by Marta Garnelo, Jeremy Fraenkel and Gabriel Suissa, who came from DeepMind, Bridgewater and Greenfield Partners. What it is building: nEXUS, a large tabular model; data-efficient learning. Raised a $255M Series A in stealth. It has raised $255M in disclosed rounds, most recently a Series A of $255M at a $1.4B valuation in February 2026. It is still in stealth, with nothing outsiders can use.
- Founders
- Marta Garnelo (ex-Google DeepMind), Jeremy Fraenkel (ex-Bridgewater), Gabriel Suissa (ex-Greenfield Partners)
- Founders from
- ex-Google DeepMind, ex-Bridgewater, ex-Greenfield Partners
- Location
- San Francisco, US (North America)
- Valuation
- $1.4B set by the last priced round
- Raised
- $255M disclosed
- Investors
- ·
- What ships
- Stealth
Rounds
| Date | Round | Amount | Valuation | Lead | Source |
|---|---|---|---|---|---|
| Feb 15, 2026 | Series AValuation per neolabs.fyi estimate | $255M | $1.4B | · | nea.com |
Sources
- NEA neolab market nea.com
News
- Jun 25, 2026
-
Feb 5, 2026
Same research area
- TypeSafe AI $7.5B · San Francisco, US
- Sakana AI $2.65B · Tokyo, JP
- Liquid AI $2B · Cambridge, MA, US
- Flapping Airplanes $1.5B · San Francisco, US
- doubleAI $1B · Tel Aviv, IL
- Inception Labs $500M · Palo Alto, US