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.
Open-source AI agent runtime CLI written in Rust. Single binary, zero config, 13+ providers, Tap registry for specialist agents, MCP support, adaptive compression, hard spending caps.
HarnessRouter is the world's first unified interface for agent harnesses. Your product sends a task through one HTTP API; HarnessRouter runs the agent harness (Codex, Claude Code, or Hermes) in an isolated sandboxed session and streams progress, files, and reviewable...
YATFA builds the engineering organization your agents have been missing. Instead of another chat UI, a deterministic engine orchestrates the entire lifecycle against your codebase 24/7. We give agents the exact environment, toolchains, and repository context they need to ship:...
Ukraine
3code is a free and open source command-line coding agent built from the ground up to be efficient enough to use 3rd party token providers without a coding plan.
Germany
EU
app.nz is an AI agent cloud for shipping software: coding agents work from repos, run tests and visual checks, open PRs, and deploy apps, APIs, workers, and model endpoints from one platform.
guIDE is the first truly native LLM IDE — unlimited completions, complete privacy, no subscriptions. Built like VS Code, designed for your local LLM AI models directly on your machine. Offline-first and privacy-first with native tools built for speed.
AI code editor that makes multi-file changes to GitHub repos via GitHub's API. No local clone, chat-driven, commit or PR straight from your browser.
United States
New Zealand
