Oct 30th 2025
Video
Mark Sujew
Notebook internals in Theia
Mark explains how native Jupyter-style notebooks were implemented in Theia, detailing key architecture choices and performance improvements.
→watch the video
It's the working environment that counts: cloud and desktop IDEs
Extensible platforms for developing cloud and desktop development environments using state-of-the-art web technology stacks.
Innovating.
Empowering.
Implementing.
Eclipse Theia
We founded Theia in 2017, an open-source IDE framework designed as a successor to Eclipse RCP, which had been the leading platform for custom desktop tools for many years.
Designed for customization
Theia combines pluggable VS Code extensions with compile-time extensions, enabling both compatibility with the VS Code ecosystem and deep customizations.
Desktop, cloud or both
You can package Theia as a desktop app or deploy it into cloud development environments – or even target both platforms with the same code base.
VS Code
We support you in creating custom VS Code extensions: DSL integration, custom widgets, or any other functionality based on the extension API.
Full flexibility with extensions
Install your extensions into the standard VS Code app, a cloud deployment of VS Code, or Eclipse Theia.
What others say about us:
«I was honestly impressed by the quality of results we could see from our cooperation with TypeFox after only a short time.»
Alexandre Betis, Co-Founder, The Signalling Company
«Working with the TypeFox team has enabled us to expedite our engineering and bring important features to our customers.»
Mark Ledsome, VP Engineering, Plotly
«I had the pleasure of working with TypeFox to create a Web IDE dedicated to analytics for blockchain data. I am truly impressed by the remarkable skills of the TypeFox team. Collaborating with them is an enjoyable and rewarding experience.»
A. Lajmi, Tech Lead, Plugbee
«TypeFox has accelerated our learning curve in IDE and DSL development, greatly enhancing efficiency in our development process.»
James McCormack, Co-Founder, Aurora Constellations
«The cooperation with TypeFox went extremely smoothly. With the help of the professionals there, the first usable version of the language server and VS Code extension for our BBx language was up and running in a heartbeat.»
Stephan Wald, Head of Development, BASIS Europe
«I was honestly impressed by the quality of results we could see from our cooperation with TypeFox after only a short time.»
Alexandre Betis, Co-Founder, The Signalling Company
«Working with the TypeFox team has enabled us to expedite our engineering and bring important features to our customers.»
Mark Ledsome, VP Engineering, Plotly
Counting on us means counting on a successful project
Pioneers in IDE development
Creators of Theia, a highly customizable and web-deployable alternative to VS Code trusted by global players like Google, Red Hat, Ericsson, SAP, Arm, and more.
Advisory support
Comprehensive advisory support throughout the entire design and implementation process of your development environment.
Creators of Open VSX
Open VSX is a trusted and free marketplace for VS Code extensions, empowering developers and corporations while fostering a vibrant open-source ecosystem.
Trusted by a diverse range of industries:
Finance, insurance, consulting, data science, telecommunication, automation, custom hardware (ASIC / SoC), automotive, railway
Trust us tooBeen there. Done that. Whatʼs next?
Gitpod, the leading platform for on-demand cloud development environments (CDEs), was invented at TypeFox. Gitpod offers CDEs for web-based coding or seamless integration with local IDEs. It is recognized worldwide and inspiring similar products in the market.
Our commitment to open innovation is derived from our passion to collaborate with diverse communities, creating high-quality open source tools and IDEs together.
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