Poolside

Poolside builds proprietary foundation models and autonomous coding assistants aimed squarely at enterprise software development.

Founded by former GitHub CTO Jason Warner and Eiso Kant, it relocated its headquarters from San Francisco to Paris, positioning itself as a European frontier-model lab. Rather than general-purpose chat, its models are tuned for generating, completing and reasoning about code inside real engineering workflows.

By 2026 it ranked among Europe's most valuable AI startups, reflecting investor appetite for AI that can shoulder serious software work.