Best Open-Source AI Coding Agents (2026)

Open-source coding agents you can run with your own API keys, in the terminal or in VS Code.

1. Cline

   Open-source autonomous coding agent for VS Code.

   Open source (BYO API key) VS Code Official site

2. Roo Code

   Open-source AI coding agent for VS Code with custom modes (a Cline fork).

   Open source (Apache-2.0) VS Code Official site

3. Kilo Code

   Open-source AI coding agent for VS Code and JetBrains.

   Open source VS Code, JetBrains Official site

4. Aider

   AI pair programming in your terminal, git-aware.

   Open source (Apache-2.0) CLI Official site

5. OpenHands

   Open-source platform for software development agents (formerly OpenDevin).

   Open source (MIT) Python Official site

6. Gemini CLI

   Google's open-source AI agent bringing Gemini to the terminal.

   Open source (Apache-2.0) CLI Official site

7. opencode

   Open-source AI coding agent built for the terminal.

   Open source (MIT) CLI Official site

8. Continue

   Open-source AI code assistant and agents for VS Code and JetBrains.

   Open source (Apache-2.0) VS Code, JetBrains Official site

9. Zed

   High-performance code editor with an agent panel and Agent Client Protocol support.

   Open source + paid AI Desktop Official site