River AI

AI models Series A (opens in a new tab) river.ai (opens in a new tab) · in/river-ai-official (opens in a new tab) · @river_ai_inc (opens in a new tab)

River sells an API that fine-tunes open models on a customer's own data and serves them on an OpenAI-compatible endpoint, with the weights owned by the customer. It is bought by companies running support queues, document pipelines or coding workflows, priced per token.