TrendingAI toolsAI personasAI memesTake the testSubmit a toolAbout
LanguageBahasa IndonesiaDeutschEnglishEspañolFrançaisItalianoPortuguês日本語한국어简体中文
Coding · open source

Open source AI coding assistants

8 AI coding assistants whose source code is public under an open source license. Each one links to its official site and its repository, and was checked against the repository on 2026-10-22.

By my9ai · checked 2026-10-22

  1. 1Gemini CLI logo

    Gemini CLI Apache-2.0

    Terminal agent from Google that works through Gemini models; the CLI itself is open source.

    Official site · Source code · Gemini CLI on my9ai

  2. 2Codex logo

    Codex Apache-2.0

    Codex CLI, OpenAI's terminal coding agent, is open source; the cloud and IDE versions of Codex are not part of the repo.

    Official site · Source code · Codex on my9ai

  3. 3Cline logo

    Cline Apache-2.0

    Agent that lives in VS Code, asks before it edits files or runs commands, and works with the model provider you choose.

    Official site · Source code · Cline on my9ai

  4. 4Kilo Code logo

    Kilo Code MIT

    Open-source coding agent for VS Code and JetBrains that also works with the model provider you choose.

    Official site · Source code · Kilo Code on my9ai

  5. 5C

    Continue Apache-2.0

    Open-source assistant for VS Code and JetBrains: chat, autocomplete and edits with models you configure, including local ones.

    Official site · Source code · Continue on my9ai

  6. 6A

    Aider Apache-2.0

    Pair programming in the terminal: edits files in your git repo and commits each change.

    Official site · Source code · Aider on my9ai

  7. 7opencode logo

    opencode MIT

    Open-source coding agent for the terminal that supports many model providers.

    Official site · Source code · opencode on my9ai

  8. 8OpenHands logo

    OpenHands MIT

    Open-source software-developer agent that writes code, runs commands and browses the web in a sandbox.

    Official site · Source code · OpenHands on my9ai

What is the best open source AI coding assistant?

There is no single best one: it depends where you work. In the terminal, Aider, opencode, Gemini CLI and Codex CLI are the usual picks; inside VS Code or JetBrains, Cline, Kilo Code and Continue. All eight are open source, so you can read the code, and most let you bring your own model, including local ones. The tool is free; the model behind it usually is not.

What counts as open source here?

The assistant itself (the editor extension or command-line tool) has its source published under a license listed above, and the repository is not archived. Hosted services around a tool, such as cloud versions or paid plans, can still be closed. Licenses and repositories can change, so check the repo before you depend on one.

Put yours in your nine

Which of these do you actually use? Pick your nine AI tools, get your persona, and share the card.

Make my 9