This page may contain stale information. Last updated: 2026-08-16
Overview
River AI is a Palo Alto startup (incorporated April 2026) building infrastructure for enterprise-owned custom AI models on open-weight stacks. Distinct from cross-river (Stripe banking partner).
Recent Developments
- 2026-08-11: $1.1B combined Series Seed + Series A — General Catalyst, AMP PBC co-lead; NVIDIA, AMD Ventures, Y Combinator, Temasek (2026-08-11-river-ai-funding-official)
- Product: API for LoRA fine-tuning and RL on frontier open-weight models
- Claims: 15–20 min complex RL runs; 2–4× cost savings vs closed APIs — company-stated, unverified
- Valuation undisclosed; NYT ~$5B — attribute as secondary
- igor-babuschkin investing up to $100M personal capital
- Roadmap: personalization layer, personal AI hardware