Apps similar to Codex include opencode, which is free and open source. Other options are Claude Code, Google Antigravity, Cursor and Void. There's no shortage of AI Coding Assistants like Codex, with more than 100 alternatives for Mac, Windows, Linux, the web and self-hosting.
Terminal-native open-source AI coding assistant for Mac, Windows, Linux, and BSD, featuring cross-session memory, reading and writing code, Git management, command execution, built-in MiMo Auto for zero configuration start, and integration with mainstream LLM provider APIs.
China
Tabby is an open-source, self-hosted AI coding assistant. With Tabby, every team can set up its own LLM-powered code completion server with ease.
United States
Pi aka Pi.dev is a minimal terminal coding harness. Adapt pi to your workflows, not the other way around, without having to fork and modify pi internals.
Australia
Lightning-fast completions, deep code understanding, and agentic software engineering—right where you work.
France
EU
A minimalist, terminal-native coding agent. A single native C binary that uses a few MBs of RAM. Local models are first-class via llama.cpp and Ollama; also OpenAI, Anthropic, OpenRouter, and Codex.
Ukraine
Autonomous coding agent right in your IDE, capable of creating/editing files, executing commands, using the browser, and more with your permission every step of the way.
United States
Qoder is an AI-powered agentic coding platform and IDE that automates complex software development tasks using autonomous AI agents.
China
Jules is an asynchronous agent that gets out of your way. It lets you focus on the coding you want to do, meawnwhile picking up all the other random tasks that you rather not do.
United States
Open source AI coding assistant for planning, building, and fixing code. We frequently merge features from open-source projects like Roo Code and Cline, while building our own vision.
United States
Terminal interface for developers with agentic multi-step reasoning, natural language commands, multi-file and codebase editing, tool invocation, seamless SSH workflow support, low resource use, and integrated settings sync with graphical environments for flexible operations.
United States
You think it, Junie helps make it happen – right in your IDE. Available on IntelliJ IDEA, PyCharm, WebStorm and .
CzechiaEU
Visual AI programming platform with a graphical interface for creating, editing, and debugging LLM agent workflows, supporting real-time collaboration, YAML-based version control, open-source TypeScript library integration, and scalable deployment in production environments.
United States
