Poolside

Poolside is an AI company building foundation models purpose-built for software engineering. Its models — trained through reinforcement learning to reason about code, architecture, and development processes — power an enterprise AI coding assistant and on-premises deployment stack. Customers are primarily Global 2000 companies and public-sector agencies. Founded by Jason Warner (former CTO of GitHub) and Eiso Kant, Poolside raised a $500M Series B in October 2024, with Nvidia subsequently announcing an investment of up to $1B at a $12B valuation.