Bolt.new is a AI app builder: Prompt, run, edit and deploy full-stack apps entirely in your browser. If it isn't the right fit, here are the other AI app builders we track, each with an official demo and sourced pricing. Last checked 2026-10-17.
Chat-based builder for real websites and web apps, evolved from the open-source gpt-engineer project and the gptengineer.app platform. source
Vercel's AI builder that generates UIs and apps from prompts, with visual Design Mode, GitHub sync and deploy to Vercel. source
Online development platform with Replit Agent, which builds apps from natural-language descriptions; Agent 4 adds Design Canvas, shared collaboration and parallel tasks. source
AI app builder: describe what you want in chat and it generates a full app with authentication, database and analytics built in. source
Other AI app builders we track: Lovable, v0, Replit, Base44.
These alternatives list a free tier or free plan: Lovable, v0, Replit, Base44. Limits vary; check each official pricing page.
We do not currently track an open-source AI app builder besides those listed here.
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