Top OpenAI Codex
Alternatives

Bolt.new

Transform natural language prompts into production-ready full-stack applications in minutes, entirely in your browser.

#1

Bolt.new is an AI-powered builder that converts plain-language descriptions into complete web applications with frontend, backend, and database infrastructure. Built on StackBlitz's WebContainers technology, it eliminates setup overhead and enables developers to iterate through chat-based refinement or direct code editing.

Google IDX (Firebase) is now unified into Firebase Studio, an AI-powered, browser-based development environment for rapidly prototyping, building, and shipping full-stack, AI-infused apps. It combines a familiar Code OSS editor, Gemini agents, and deep Firebase and Google Cloud integration in a single, premium workspace.

Replit Agent

Autonomous in-IDE AI engineer that turns natural language into running software on Replit.

#3

Replit Agent is an autonomous, Replit-native AI software builder that plans, writes, runs, tests, and deploys full applications directly inside the IDE. Describe what you want—like a SaaS dashboard with billing—and Agent scaffolds the project, wires frontend, backend, and database, and ships it on Replit.

Base44

Transform ideas into fully functional apps in minutes using natural language, no coding required.

#4

Base44 is an AI-powered no-code platform that converts plain English descriptions into production-ready web applications with integrated database, authentication, hosting, and backend infrastructure automatically configured.

Tempo Labs

AI-powered visual editor where teams design, edit, and ship production React apps.

#5

Tempo Labs is an AI-native visual IDE for React and React Native that unifies a design tool, code editor, and coding agent. Teams visually design and refactor real production UIs, generate full-stack apps from prompts, and push clean, idiomatic React code to GitHub without sacrificing control or quality.