v0 is a AI app builder: Vercel's prompt-to-app builder with Design Mode and one-click deploy. 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
Browser-based AI builder for websites, web apps, mobile apps and prototypes by StackBlitz, running on WebContainers with no local setup. An MIT-licensed open-source version of the codebase is on GitHub. 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, Bolt.new, Replit, Base44.
These alternatives list a free tier or free plan: Lovable, Bolt.new, Replit, Base44. Limits vary; check each official pricing page.
Open-source options in this category: Bolt.new.
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