Is Theia IDE a fork of VS Code?

No, Theia is an independent platform built from the ground up using a modular architecture. While it reuses components like the Monaco editor and supports VS Code extensions, it is not a fork.

How do I enable AI features in Theia?

AI features are disabled by default. To activate them, go to Preferences and enable 'AI-features => AI Enable', then configure your preferred LLM provider.

Which LLMs are supported?

Theia supports various providers including OpenAI, Anthropic, Google Gemini, Ollama (for local models), and any OpenAI-compatible API.

Can I use Theia IDE offline?

Yes, the desktop version can be used offline. For AI features, you can use local LLM providers like Ollama or LlamaFile to maintain a fully offline AI coding environment.

Where does Theia get its extensions?

Theia uses the Open VSX Registry, a vendor-neutral alternative to the Microsoft VS Code Marketplace.

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Coding

Free

Theia IDE

A modern, open-source IDE for desktop and cloud featuring 'Theia AI' for transparent, customizable AI-driven coding with full control over LLM providers.

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Rating

Reviews

Upvotes

3 months ago

Listed

Coding

IDE

Open Source

AI Agents

Cloud Development

VS Code Compatible

Developer Tools

Tool information

Provider

Eclipse Foundation

Platforms

Windows

macOS

Linux

Web App

Self-Hosted

Languages

TypeScript

JavaScript

Python

Java

C++

Rust

PHP

API Available

Yes

Added to directory

3 months ago

Last updated

about 1 month ago

Rating

Not available

Pricing

Free

About Theia IDE

What the tool does and who it's for

Theia IDE is a next-generation, open-source development environment built on the Eclipse Theia platform. It is designed to run seamlessly across desktop and cloud environments, providing a highly customizable and vendor-neutral alternative to VS Code. The IDE distinguishes itself through its deep integration of 'Theia AI,' a transparent framework that gives developers full control over AI interactions. Users can bring their own Large Language Models (LLMs) from providers like OpenAI, Anthropic, Google, or local models via Ollama and LlamaFile. It supports the Language Server Protocol (LSP), Debug Adapter Protocol (DAP), and is fully compatible with VS Code extensions via the Open VSX registry.

Key capabilities

Theia AI Framework: Offers transparent AI interactions with full visibility into communication between the IDE and LLMs.

Bring Your Own Model: Support for OpenAI, Anthropic, Google AI, Hugging Face, and local models via Ollama.

Cloud & Desktop: Single source code base allows running as a native desktop app or in a web browser.

VS Code Extension Compatibility: Leverages the Open VSX registry to support thousands of existing VS Code extensions.

Customizable Architecture: Modular design allows for white-labeling and deep UI customization, including detachable views.

Vendor Neutrality: Hosted by the Eclipse Foundation, ensuring no single-vendor lock-in or telemetry mandates.

Theia Coder: An open AI coding agent that provides smart completions, refactoring, and code explanations.

Multi-Language Support: Built-in support for Language Server Protocol (LSP) and Debug Adapter Protocol (DAP).

Pricing

Free — plans below

Open Source

Professional Support

Contact sales

Commercial support from partners (EclipseSource, etc.)
Custom tool development
Training and sponsored development
Priority bug fixes

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