Theia IDE

About Theia IDE

Theia IDE is an open-source development environment built on the Eclipse Theia Platform. It runs as a desktop application or in the browser, supports the Language Server Protocol and is compatible with VS Code extensions, with more than 3000 available from open-vsx.org. It is not a fork of VS Code.

AI assistance is built in, with an emphasis on transparency and control over your data. The underlying platform can also be used to build custom IDEs and tools.

Details

Pricing

FreeFree and open source.

License

Open source, license not stated

Developer

Eclipse Foundation

Platforms

Windows, macOS, Linux, Web

How it runs

Downloadable app, Web application

Best suited for

Developers who want an open, vendor-neutral alternative to VS Code

Categories

Code editors, Developer tools

Last verified

September 23, 2026

Added

September 23, 2026

Provenance

Facts checked against the developer's own pages and store listings, 1 sources on file.

Software that can replace Theia IDE for an important use case, and what changes if you switch.

• 

  Visual Studio Code

  Microsoft's code editor, free to use but shipped under a Microsoft licence rather than an open one.

  FreeProprietaryWindowsmacOSLinux

  Visual Studio Code gives access to the Microsoft extension marketplace and a larger community, but it is not open source and collects telemetry.

• 

  VSCodium

  Visual Studio Code built from the same source without Microsoft’s branding, telemetry or licence.

  FreeOpen sourceWindowsmacOSLinux

  VSCodium is the MIT-licensed VS Code build without telemetry that also uses Open VSX, but it runs as a desktop app only.

• 

  code-server

  Use a VS Code-based workspace through your browser.

  FreeOpen sourceLinuxmacOSSelf-hostedWeb

  code-server runs a VS Code-based workspace in the browser on a machine you control, requiring a configured host with WebSocket support.

• 

  OpenVSCode Server

  Upstream VS Code packaged to run on a remote machine and be used from a web browser.

  FreeOpen sourceLinuxWebSelf-hosted

  OpenVSCode Server packages upstream VS Code for browser use on your own server, which you must run and secure yourself.

• 

  Eclipse IDE

  Long-established open-source IDE with a very large plugin marketplace.

  FreeOpen sourceWindowsmacOSLinux

  Eclipse IDE is the Eclipse Foundation's older desktop IDE with a very large plugin marketplace, but its workspace model feels dated.

• 

  Zed

  A Rust editor from the people who built Atom, written for speed and for two people editing one file.

  FreemiumOpen sourceWindowsmacOSLinux

  Zed is a native Rust editor with collaboration and AI features using your own key, but it has a smaller extension ecosystem and no VS Code extension support.

• 

  Pulsar

  Community-maintained continuation of the Atom text editor.

  FreeOpen sourceWindowsmacOSLinux

  Pulsar is an open-source continuation of Atom with its own package registry, Electron-based and desktop only.

Theia IDE as an alternative

Listings that name Theia IDE as an alternative.

• 

  Android Studio

  Google's official IDE for building Android apps, based on IntelliJ.

  FreeProprietaryWindowsmacOS

  Theia IDE is a vendor-neutral Eclipse Foundation IDE for desktop and browser that runs VS Code extensions from Open VSX, without built-in Android tooling.

• 

  Apache NetBeans

  An open-source IDE for Java, PHP, JavaScript, HTML and other languages from Apache.

  FreeOpen sourceWindowsmacOSLinux

  Theia IDE is an open-source Eclipse Foundation IDE for desktop and browser that runs VS Code extensions from Open VSX, with a smaller community than VS Code.

• 

  Cursor

  An AI code editor built on VS Code, with coding agents that plan and carry out tasks.

  FreemiumProprietarymacOSCommand line

  Theia IDE is an open-source, vendor-neutral IDE for desktop and browser with built-in AI features and control over data, using VS Code extensions from Open VSX.

• 

  Eclipse Che

  A self-hostable, Kubernetes-native platform that runs browser-based development workspaces for your team.

  FreeOpen sourceWebSelf-hosted

  Theia IDE is an Eclipse Foundation open-source IDE for desktop and browser that runs VS Code extensions from Open VSX, without Che's Kubernetes-based shared workspaces.

• 

  IntelliJ IDEA

  Java and Kotlin IDE with deep code analysis and refactoring.

  FreemiumOpen sourceWindowsmacOSLinux

  Theia IDE is an open-source, vendor-neutral IDE for desktop and browser that runs VS Code extensions from Open VSX, with a smaller community.

• 

  KDevelop

  A cross-platform open-source IDE from KDE for C, C++, Python, QML/JavaScript and PHP.

  FreeOpen sourceWindowsmacOSLinux

  Theia IDE is an Eclipse Foundation editor for desktop and browser that runs VS Code extensions from Open VSX, rather than a C++-focused IDE.

• 

  StackBlitz

  A browser-based IDE that runs full-stack Node.js web projects entirely inside the browser tab.

  FreemiumProprietaryWeb

  Theia IDE is an open-source Eclipse Foundation IDE for desktop and browser that runs VS Code extensions from Open VSX, covering more than web projects.

• 

  Trae

  An AI-powered code editor with built-in chat and agent modes for writing and changing code.

  FreemiumProprietaryWindowsmacOS

  Theia IDE is an open-source Eclipse Foundation editor with built-in AI features and control over data, running VS Code extensions.

• 

  Visual Studio

  Microsoft's integrated development environment for .NET, C++ and Windows development, with a free Community edition.

  FreemiumProprietaryWindows

  Theia IDE is an open-source Eclipse Foundation IDE for desktop and browser that runs VS Code extensions from Open VSX.

Similar software

Related functionality, not necessarily a direct replacement.

• 

  Jupyter

  Browser-based notebooks, JupyterLab and the classic Notebook, that combine live code, text and visualizations.

  FreeOpen sourceWindowsmacOSLinuxWeb