Alternatives to Codex by OpenAI

Spec-driven AI coding platform that turns prompts into requirements, designs, and tasks, then implements them with parallel agents and property-based tests.

Claude Code is Anthropic's agentic coding assistant that plans, edits, and runs commands across your repo from the terminal, IDE, or browser.

Open-source coding agent that reads your repo, edits files, and runs terminal commands across VS Code, JetBrains, CLI, and a desktop app.

Open-source terminal coding agent that runs against any model you point it at — OpenAI, Gemini, Codex, Grok, Ollama, LM Studio and 200+ more.

Free, MIT-licensed desktop coding agent that runs on your machine and works with any LLM, from Codex-based cloud models to local Qwen3.

Multiplayer coding agent IDE and cloud that runs a six-phase QRSPI workflow so teams review design before 2,000 lines of code land.

Open-source platform for autonomous coding agents that fix bugs, review PRs, and automate engineering workflows.

An autonomous website platform that runs on your own Git repo, with scheduled AI agents that keep improving the site after launch.

Devin Desktop (formerly Windsurf) is an agent-native IDE for running fleets of local and cloud coding agents from one Sessions board.

Define cloud coding agents in environment.yaml, deploy them by merging a PR, and run Claude Code or Codex with scoped permissions and hard spend caps.

Open platform for running fleets of cloud coding agents across your SDLC, with an agentic terminal and a CLI agent that works anywhere

Open-source autonomous AI coding agent that plans, executes, and deploys tasks inside VS Code and JetBrains IDEs.

Devin Desktop (formerly Windsurf) is an agent-centric IDE for running fleets of local and cloud coding agents from one Sessions Board.

Verdent is an agentic coding platform that turns plain-language goals into full products — auth, billing, admin, deployment — with parallel agents.

Open-source agentic coding assistant that runs inside your terminal and wires any LLM into your CLI workflow.

Cursor is your coding agent for building ambitious software — plan, build, test and ship with AI agents across IDE, CLI, Slack and cloud.

Freebuff is an ad-funded coding agent suite — CLI, desktop, cloud IDE, and web app builder — that costs $0 to use.

Agentic coding platform where one agent core drives an IDE, CLI, JetBrains plugin, mobile app, SDK, and cloud agents.

Kilo is an open-source AI coding agent with 500+ models across VS Code, JetBrains, CLI, cloud, and Slack — at exact provider rates.

MIT-licensed terminal coding agent that reads files, edits code, and runs commands with the model you choose.

Open-source desktop workspace that runs Claude Code, Codex, OpenClaw, and other CLI coding agents side by side with per-task model routing.

Open-source AI coding agent that runs in your terminal, IDE, or desktop app and connects to 75+ LLM providers.

Devin Desktop (formerly Windsurf Editor) is an IDE built around running fleets of local and cloud coding agents from one surface.

Paseo is a self-hosted control plane that runs Claude Code, Codex, Copilot and 30+ other coding agents from your phone, desktop, browser or CLI.

Capy orchestrates fleets of cloud coding agents inside Slack, GitHub, and Linear, with unlimited members on every plan.

A desktop console that starts, tracks, and lands the work of every coding agent you run, each in its own terminal and branch.

Free desktop app that runs AI coding agents as a team on a self-updating Kanban board you supervise.

Herm is an open-source coding agent that runs every session inside its own container, with a single Go binary and your choice of model provider.

Open-weight agentic coding models — Laguna XS 2.1 (33B) and Laguna S 2.1 (118B) — built for code that cannot leave your security boundary.

Roo Code is a pre-launch multi-agent AI coding assistant for VS Code, currently collecting email signups on a landing page only