FundedStartupsDaily / AI & Machine Learning / RadixArk

RadixArk raises $100M

RadixArk announced a Seed round of $100M on 5 May 2026. The company operates in AI & Machine Learning and is based in United States. It was founded by Ying Sheng, Co-founder & CEO.

Raised
$100M
Stage
Seed
Industry
AI & Machine Learning
Country
United States

Founder

Ying Sheng
Co-founder & CEO, RadixArk
LinkedIn profileradixark.com

Outreach angles

  • -Ying Sheng left xAI in August 2025 to co-found RadixArk, drawing on her AI infrastructure experience there.
  • -She co-founded the company with Banghua Zhu, a fellow AI infrastructure veteran from NVIDIA, and the team built the open-source SGLang project.
  • -The $100M seed at a $400M valuation, led by Accel and Spark Capital, funds making frontier AI inference orders of magnitude cheaper.

Signals

SeedAI-NativeOpen SourceDeep TechDev ToolsB2B

Round details

Company: RadixArk
Domain: radixark.com
Amount: $100M
Stage: Seed
Industry: AI & Machine Learning
Country: United States
Announced: 5 May 2026
Source: announcement

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