Alternatives to Codex by OpenAI

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

Orchestrate fleets of local and cloud coding agents from one AI-native IDE.

Cloud platform for running AI coding agents defined as YAML code in your GitHub repo

Build launch-ready software from plain text with parallel AI agents.

AI coding agent that plans, builds, tests, and ships features from idea to PR.

Open-weight agentic coding models for secure, on-prem enterprise software engineering.

Agentic coding platform that plans, executes, verifies, and iterates on real-world engineering tasks.

Open-source AI agent that autonomously fixes GitHub issues using your choice of LLM

Manage fleets of local and cloud AI agents from one IDE

Open-source, terminal-first agent manager that runs multiple AI coding agents in parallel git worktrees.

Open-source IDE to orchestrate 100+ coding agents in parallel

Orchestrate a fleet of cloud coding agents in the tools your team already uses.

AI-native SDLC automation with a custom codebase knowledge graph for large-scale engineering teams

Open-weight agentic coding models for regulated enterprises needing auditable, on-prem AI

Multi-agent AI coding assistant for VS Code, launching soon.

AWS-native AI coding assistant with agentic automation for developers

Open AI agent toolkit for loyal, auditable, build-it-yourself AI.

Cosmos: agent orchestration platform for running AI coding agents across the full SDLC

Autonomous terminal-native coding assistant for multi-step engineering tasks

An open-source agentic development environment combining a modern terminal with tools to orchestrate coding agents at scale.

Open-source terminal agent that runs natural-language commands on your computer

JetBrains IDE AI coding agent for deep-context refactoring and test generation

Autonomous AI agents that build full apps and read repos

Secure, high-speed AI inference and coding agents for enterprise teams.

Open-source autonomous AI coding agent that plans, executes, and deploys tasks in your IDE.

Agent-centric IDE to plan, delegate, and review multiple coding agents at once.

Autonomous AI software engineer that plans, writes, tests, and ships production code.

Terminal-based AI pair programming with Git-native workflows and codebase-wide awareness

Open-source coding agent for your IDE and terminal with human-in-the-loop approval.

Open-source AI agent for desktop, CLI, and API — automate code, research, and workflows locally