# River AI

> API for LoRA fine-tuning and reinforcement learning on open-weight models — path to personal AI you own.

## Why it is interesting

Raised $1.1B Seed/A (Aug 2026) led by General Catalyst and AMP only ~two months after emerging — selling owned post-training now, personal intelligence later, with NVIDIA/AMD as strategics.

## Profile

- **Latest funding:** Series Seed + Series A — $1.1B (August 2026)
- **Latest known valuation:** Not publicly disclosed
- **Total disclosed equity funding:** $1.1B
- **Stage:** series-a
- **Status:** private
- **Industries:** ai-ml, infra-cloud, developer-tools
- **Coverage:** full
- **Last updated:** 2026-08-12
- **Latest funding investors:** General Catalyst, AMP PBC, NVIDIA, AMD Ventures, Y Combinator, Temasek

## Key facts

- Seed + Series A (Aug 11, 2026): $1.1B led by General Catalyst and AMP PBC (company)
- Strategics: NVIDIA, AMD Ventures; also Y Combinator, Temasek
- Product: LoRA + RL fine-tuning API; company claims 15–20 min RL runs and 2–4× cost savings vs closed alternatives
- Founder: Igor Babuschkin (ex–xAI, OpenAI, DeepMind)

## Funding history

- Series Seed + Series A · $1.1B · August 2026
  Source: https://river.ai/series-seed-series-a-funding

## Investors in our directory

- https://venturecapitaltracker.com/fund/general-catalyst

## Related articles

- https://venturecapitaltracker.com/2026-river-ai-1-1b-general-catalyst-personal-ai
- https://venturecapitaltracker.com/2026-august-11-12-investment-news-personal-ai-defense-health

**By:** [Venture Capital Tracker](https://venturecapitaltracker.com/editorial-policy)
**Last updated:** August 12, 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/river-ai