RadixArk

Private

Bay Area AI infrastructure company commercializing SGLang, an open-source LLM inference engine that serves trillions of tokens daily for Google, Microsoft, Nvidia, Oracle, AMD, Nebius, LinkedIn, xAI, and Thinking Machines. Launched with a $100M seed at $400M.

Founders Ying Sheng

CEO Ying Sheng

Company

Founded

2026

Headquarters

San Francisco, United States

Financials

Total Funding

$100M

Last Valuation

$400M

Sectors

Artificial Intelligence Developer Tools Cloud Computing

radixark.com

Funding History

1 round

Seed May 6, 2026

$100M

Valuation: $400M

Accel (Lead) Spark Capital NVentures (NVIDIA) Salience Capital A&E Investments HOF Capital Walden Catalyst Ventures AMD LDV Partners WTT Investment MediaTek Igor Babuschkin Lip-Bu Tan Hock Tan John Schulman Soumith Chintala

Funding data is compiled from multiple independent sources including company announcements, press coverage, and regulatory filings. While we strive for accuracy, amounts and dates may reflect reported figures at time of announcement.