Self-Hosted Code Completion and IDE Plugins

Serena is a locally run MCP toolkit that gives AI coding agents access to code structure: functions, classes and the references between them. It's for developers who want their agent to find and change specific parts of a codebase without reading whole files or relying on text matching. It requires an LLM client and works with Claude Code, Codex, OpenCode, Cursor and OpenWebUI.

Cline is an AI coding agent for developers who want help understanding a codebase and changing it. Its shared agent core is open source under Apache 2.0. You can use it in VS Code, JetBrains IDEs, or a terminal. A native desktop app runs on macOS and Windows. No editor is required for desktop sessions. The JetBrains plugin itself is not open source.

CodeGPT is an AI coding assistant for VS Code, JetBrains and Visual Studio that lets developers choose between models running locally through Ollama or LM Studio and cloud models such as Claude, GPT, Gemini and Grok. It's for people who want help writing and debugging code inside their editor while keeping control over which model handles each task.

Refact is a self-hosted AI coding assistant for developers who want an agent to work across their repository and development tools. The original project is archived and no longer maintained; ongoing development has moved to JegernOUTT/refact. The original code uses the BSD-3-Clause license.

Wingman-AI is a self-hosted AI agent platform for work that needs ongoing context and several agents with different roles. It suits developers and teams handling research, support, or recurring operations alongside coding tasks. A lead agent can delegate work to specialized subagents, each with its own workspace and session history.

Llama Coder is an open source VS Code extension for developers who want a self-hosted alternative to GitHub Copilot's code completion. It uses Ollama to run models on your own hardware, either on the computer you're coding on or on a separate machine. The extension has no telemetry or tracking.

Twinny is an AI coding assistant for VS Code that lets developers choose where their models run: on their own computer, a private server or a hosted API. It's for individuals and teams who want code suggestions and repository chat with control over where their code goes. The extension and team gateway are open source under the MIT license.

Roo Code is an AI coding assistant for developers working in a code editor. The project is archived and no longer maintained, and its extension has been shut down. It builds on Cline, and its source code is available under the Apache License 2.0.

Continue is an open-source coding agent available as a CLI, VS Code extension and JetBrains plugin. Continue was acquired by Cursor, and the project is no longer actively maintained. Its repository is read-only, and its software uses the Apache 2.0 license.

Qwen Code is an Apache 2.0 licensed AI coding agent for developers who want help working through a codebase, changing code and checking the result. It runs on macOS, Windows and Linux, with a terminal interface and a desktop app. It builds on Google Gemini CLI and has developed into an agent that can use Qwen models alongside other model providers.

avante.nvim brings Cursor-style AI assistance into Neovim for developers who want to keep their editor and choose their own model backend. It answers questions about code, suggests changes and applies edits directly to source files. The plugin is open source under Apache 2.0.

codecompanion.nvim brings model chat, inline code edits, and coding agents into Neovim. It's for developers who want AI assistance inside their editor, with a choice between local LLMs through Ollama and cloud providers such as Anthropic, OpenAI, and Google Gemini. The plugin runs in Neovim; where model processing happens depends on the backend you connect.

gptel brings LLM conversations into the Emacs buffers where you already write and work. It's for Emacs users who want AI help alongside their text or code, with a choice of local model servers and cloud providers. The client is open source under GPL-3.0.

Jupyter AI connects AI agents to notebooks through a chat interface inside JupyterLab. It's for people who work in computational notebooks and want an agent to help write code, debug cells, or run notebook work without moving the conversation to a separate app. The extension runs within JupyterLab; the choice of agent determines the AI service it connects to.

Kilo Code is an AI coding agent for developers who want help writing and understanding code in their editor or terminal. It runs in VS Code, JetBrains IDEs and the CLI, with cloud agents available for remote work. The project is open source under the MIT license and can be self-hosted.

Tabby is a self-hosted AI coding assistant for developers who want a GitHub Copilot alternative on their own infrastructure. Its server runs on premises and doesn't require a cloud service or separate database. Docker is supported.