Open-source alternatives to Claude Code

OpenCode

Open-source, provider-agnostic AI coding agent for terminal, desktop, and IDE.

MIT-licensed alternative to Claude Code. Switch between 75+ LLM providers, run Build/Plan agents, and keep code local — terminal, desktop, or IDE extension.

Void

Open-source Cursor alternative — VS Code fork with direct LLM access and no proprietary backend.

Apache-2.0 AI code editor with Agent/Gather modes, Tab autocomplete, and Ollama support. Your code goes straight to the provider — not through Void servers.

Kilo

Open-source agentic engineering platform — 500+ models in VS Code, JetBrains, and CLI.

MIT-licensed alternative to Cursor. Architect, Coder, and Debugger modes with MCP marketplace, browser automation, and optional API keys via Kilo Gateway.