Eclipse Theia

Category:Code Editors & IDEs
Version:v1.66.2
Latest Released:2025-11-17
Free
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Overview

Eclipse Theia is an open platform for building custom Cloud & Desktop IDEs and developer tools. The Theia IDE is a product built on the platform that can be used directly, while Theia AI brings native support for chat, agents and model integrations. The architecture is plugin-first and highly customizable, making it a strong fit for enterprise toolchains and privacy-conscious deployments.

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Use Cases

Enterprise-customized IDE

Build and distribute a custom IDE within the enterprise.

Cloud/desktop dual form

Support development in both browser and desktop applications.

Plugin-based extensions

Integrate LSP, debugging, AI, and more via extensions.

AI-native tools and IDEs

Create domain-specific AI agents, chat workflows, and coding assistance using Theia AI.

Open alternative to VS Code

Vendor-neutral IDE with compatibility for VS Code extensions via Open VSX.

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Pricing

Individual Plans

Free
Free
Includes:
  • Open source
  • Community support
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Core Features

Standard Features

Code Completion
Chat Interface
Code Generation
AI Agent Support
API Access
Offline Mode
Cloud Sync
Custom Training

Advanced Features

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Plugin architecture

Add capabilities and integrate services via extensions.

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Multi-form deployment

Support both desktop and browser applications.

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Enterprise-friendly

Fits private deployments and compliance governance.

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AI chat with slash commands

Invoke reusable prompt templates via /commands with autocomplete.

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Agent modes

Selectable behaviors for chat agents to tailor responses and workflows.

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Chat session persistence

Conversations and change sets are stored and remain actionable after restart.

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Terminal command suggestions

Agents can insert suggested commands into the terminal buffer for review.

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OpenAI Response API support

Use the modern OpenAI response endpoint for improved reliability.

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AI Models Support

API Integration

OpenAI

Response API via Theia AI

Anthropic

Claude Code via official Agent SDK

Custom API

API Access
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System Requirements

Supported Platforms

Web, Windows, macOS, Linux

API Support

Plugin extensions and custom modules; Theia AI agent APIs

Compatibility

Compatible with LSP/debugging/terminal; supports VS Code extensions via Open VSX

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