# RadixArk

> Open-source AI infrastructure company building production systems around SGLang inference and Miles RL.

## Why it is interesting

The practical infrastructure layer for efficient AI across new architectures: SGLang serves models and Miles supports reinforcement-learning post-training. Its funding is directly disclosed and its adoption is measurable through open source.

## Profile

- **Latest funding:** Seed — $100M (May 5, 2026)
- **Latest known valuation:** $400M post-money, company-announced (May 5, 2026)
- **Total disclosed equity funding:** $100M
- **Stage:** seed
- **Status:** private
- **Industries:** N/A
- **Coverage:** full
- **Last updated:** 2026-11-13
- **Latest funding investors:** Accel, Spark Capital, NVentures, Salience Capital, A&E Investment, HOF Capital, Walden Catalyst, AMD Ventures, MediaTek, Databricks Ventures

## Key facts

- $100M seed at $400M post-money, May 5, 2026
- Led by Accel and co-led by Spark Capital
- Built around SGLang inference and Miles reinforcement-learning infrastructure

## Funding history

- Seed · $100M · May 5, 2026
  Source: https://www.radixark.com/blog/radixark-launches-100m-seed

**By:** [Venture Capital Tracker](https://venturecapitaltracker.com/editorial-policy)
**Last updated:** November 13, 2026

**Editorial note:** AI tools assisted with research, structure, or drafting. Venture Capital Tracker retains human editorial responsibility for factual accuracy, relevance, and source quality before publication.

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Source: https://venturecapitaltracker.com/startup/radixark