Apps similar to Codex include opencode, which is free and open source. Other options are Google Antigravity, Claude Code, 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.
Plandex uses long-running agents to complete tasks that span multiple files and require many steps. It breaks up large tasks into smaller subtasks, then implements each one, continuing until it finishes the job.
Open source tool centered on AI-driven full stack app development, Nut generates bug analysis via Replay.io recordings and runtime behavior capturing, offering AI developers explanations for effective resolutions. Early adopters enjoy free access for feedback contributions.
United States
Zoo Code is a community-maintained, open-source AI coding assistant that continues Roo Code development after the original team stepped away in April 2026 to focus on Roomote.
Crush is an open-source, terminal-based AI coding agent built in Go by Charm (charmbracelet), designed to bring agentic coding directly into your shell with a polished TUI experience.
Enhances developer collaboration by providing codebase-aware chat, intuitive code suggestions, and advanced AI-driven explanations; accelerates coding tasks, assists in understanding unseen code structures, improving communication vastly within teams.
Copy Entire Folder to ChatGPT. Hit on Star to BookMark this Page ! Newer Release will be even Better.
Free, local-first AI coding IDE with full chat, code mode, and an autonomous coding agent that runs on your machine with any LLM (BYOLLM). No subscription.
United States
Open-source Claude Design alternative. One-click import your Claude Code / Codex API key. Prompt ? prototype / slides / PDF. Multi-model (Claude, GPT, Gemini, Kimi, GLM, Ollama). BYOK, local-first, MIT.
GitLab Duo is a software suite that leverages Artificial Intelligence (AI) to optimize various aspects of your workflows. This includes enhancing testing procedures, bolstering security measures, and improving documentation processes.
United States
Sourcery is an AI-powered tool that enhances software development productivity. It supports multiple programming languages and provides intelligent code suggestions, automated refactorings, code completion, and code generation.
United Kingdom
