European alternatives to Bolt.new

Bolt.new is StackBlitz’s AI app builder that generates and runs full-stack web applications from natural-language prompts, executed inside the WebContainers browser runtime.

It is used for prototyping, MVPs, and from late 2025 also production work via Bolt v2. Evaluations focus on output code quality, debugging UX inside the browser sandbox, deployment flow, integration with existing repositories, and pricing under prompt-based usage limits.