Updated March 9, 2026
Bolt.new by StackBlitz is an AI-powered full-stack web development platform that runs entirely in the browser. It can generate, edit, and deploy complete web applications from prompts, with support for multiple frameworks and real-time preview. Bolt supports both cloud and local AI models.
Lovable is a full-stack AI app builder that generates production-ready web applications from natural language descriptions. It handles frontend, backend, database, and authentication, deploying directly to the cloud. Lovable became the fastest-growing European startup in history, reaching $20M ARR in its first two months.
What each tool does well, and the limitations to keep in mind.
Pros
Cons
Pros
Cons
Respan lets you trace LLM and agent calls across any model or framework, A/B test prompts on production traffic, and route requests across 500+ models through one gateway.