19 Project IDX Alternatives in 2026

Turn questions into code instantly.

Blackbox AI is a coding assistant that allows you to turn any question into code. It integrates with VS Code and offers a standalone chat experience.

Browser-based full-stack AI builder.

Bolt.new is an AI-powered browser-based development environment that lets you prompt, run, edit, and deploy full-stack web apps without local setup.

Free AI toolkit for every language and IDE.

Codeium is a free AI-powered toolkit for developers. It offers autocomplete and chat in over 70+ IDEs, powered by their proprietary models.

The AI-first Code Editor built for pair programming.

Cursor is an AI-first code editor built on VS Code. It ships with a powerful AI that can write, edit, and chat about your code. It supports codebase-wide context, meaning it understands your entire project, not just the current file.

Google's cloud-based AI development workspace.

Firebase Studio (formerly Project IDX) is Google's AI-assisted workspace for full-stack, multiplatform app development in the cloud. It's built on Code OSS and powered by Gemini.

The Agent-First IDE for "Vibe Coding".

Google Antigravity is an "Agent-First" IDE that allows product managers and designers to build full-stack apps by describing intent, bridging the gap between no-code and pro-code.

Open-source coding agent and IDE.

Kilo Code is a popular open-source coding agent and IDE that integrates natively with Z.AI's GLM models for a powerful, cost-effective development experience.

Agentic IDE with spec-driven development.

Kiro is an agentic IDE that helps you go from prototype to production using spec-driven development and agent hooks. It integrates deeply with your codebase to automate repetitive tasks.

A next-generation AI-native IDE designed for agentic coding. Features spec-driven development, deep multi-file context, and native MCP support to automate complex engineering tasks.

Kiro AI is an agentic IDE that transforms natural language specs into fully functional code. It integrates deeply with your codebase, supports MCP for connecting to external tools, and offers a collaborative environment for humans and AI agents.

AI with 100M token context window.

Magic is building an AI software engineer with a 100 million token context window, aiming to complete entire tasks rather than just snippets.

Open-source AI editor with deep workflow integration.

Melty is an open-source AI code editor that integrates with your terminal and git workflow. It tracks your development lifecycle to provide context-aware assistance.

Open-source AI code editor.

PearAI is an open-source AI code editor, forked from VS Code, that integrates tools like Aider and Continue for a curated, privacy-focused AI experience.

AI-powered cloud development environment.

Replit AI is an integrated suite of artificial intelligence features for the Replit IDE, including Ghostwriter for code generation and explanation.

AI that knows your entire codebase.

Cody is an AI coding assistant that knows your entire codebase. It uses Sourcegraph's code graph to provide context-aware answers and completions.

AI-native platform for spec-driven development.

Tessl is an AI-native development platform that introduces "AI-to-AI" coding, allowing you to define specs and let agents build and maintain the code.

The adaptive AI editor with Builder Mode (Official).

Trae is an adaptive AI IDE that features a "Builder Mode" for prompt-to-project generation and a native chat interface that learns your preferences.

The privacy-focused open-source AI editor.

Void is an open-source, privacy-focused fork of VS Code. It allows you to use AI features with local models or your own API keys, ensuring your code never leaves your machine without permission.

The first agentic IDE by Codeium.

Windsurf is the first agentic IDE, built by Codeium. It features "Flows" that allow the AI and developer to work in a continuous loop, sharing context and tools.

High-performance editor with built-in AI.

Zed is a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter. It features built-in AI capabilities that integrate directly with your workflow.