Open-source alternatives to OpenAI Codex

OpenCode is one of the closest open alternatives to Claude Code, combining an agentic workflow with support for multiple providers, local models, and terminal, desktop, and IDE usage.

Pricing: Open source and free to run; model-provider costs may apply.

• Terminal-first workflow
• Multiple providers and local models
• Open source with IDE and desktop support
• Rapidly evolving project
• Some setups require additional model configuration

Pi keeps a relatively small core that developers can extend and customize while supporting multiple AI providers and local models.

Pricing: Open source; model-provider costs may apply.

• Lightweight terminal interface
• Extensible architecture
• Flexible session management
• More configuration-oriented
• Less opinionated than full-featured agents

OpenHands is an open-source platform for autonomous software development agents that inspect repositories, edit code, execute commands, run tests, and tackle larger tasks.

Pricing: Open-source core and self-hosting available; hosted and enterprise options may be paid.

• Autonomous coding workflows
• Model agnostic
• Web, CLI, and SDK interfaces
• Heavier than terminal-first tools
• Requires more infrastructure

Zed is a fast Rust-based editor that combines traditional development tools with AI-assisted coding, multiple model providers, and agent workflows.

Pricing: Open source editor; hosted AI usage may be paid.

• Fast native editor
• Integrated AI and collaboration features
• Strong developer tooling
• Requires switching editors
• Less similar to a terminal-first workflow

Cline can read and edit files, execute terminal commands, interact with external tools, and work with many AI providers through a human approval workflow.

Pricing: Open source; bring your own provider key and pay provider costs directly.

• Strong IDE integration
• Multiple providers and MCP support
• Human approval workflow
• More IDE-focused than Claude Code
• Large tasks can consume significant tokens

Aider edits multiple files, understands existing repositories, runs tests, and automatically tracks changes through Git while supporting many models.

Pricing: Open source; model-provider costs may apply.

• Excellent Git integration
• Terminal-first workflow
• Lightweight and mature
• More pair-programming focused
• Less autonomous than newer agent platforms

Kilo supports a broad range of models and specialized modes for coding, debugging, and planning, with IDE, command-line, and local-model compatibility.

Pricing: Open source with bring-your-own-key support; some workflows may use hosted services.

• Broad model support
• IDE and CLI support
• Specialized coding modes
• More complex than lightweight terminal tools
• Some workflows may depend on hosted services

Tabby provides self-hosted AI coding infrastructure with IDE integrations and local deployment options for teams that want stronger control over code and data.

Pricing: Free and self-hosted; infrastructure and model costs are your responsibility.

• Self-hosted
• IDE integrations
• Strong privacy control
• Less agentic than Claude Code
• Infrastructure required for self-hosting

Paseo orchestrates agents such as Claude Code, Codex, Copilot, OpenCode, and Pi across different machines and environments.

Pricing: Open source and self-hosted; requires external coding agents.

• Remote agent control
• Multi-agent support
• Works across multiple machines
• Not a standalone replacement
• Requires external coding agents

Forgecode is an open-source agent-driven development tool that works directly with codebases and multiple AI models.

Pricing: Open source; model-provider costs may apply.

• Terminal-first
• Multiple model support
• Codebase aware and provider flexible
• Smaller ecosystem
• Less mature than established projects

Jean coordinates Claude Code, Codex, OpenCode, Cursor, Pi, and Grok-based agents across repositories and development environments.

Pricing: Open source workspace; depends on external agents or subscriptions.

• Multi-agent and cross-repository workflows
• Remote access
• Automation features
• Not a standalone coding agent
• Depends on external agents or subscriptions