Is Expo free and open source?

Yes. Expo is free and open source, released under the MIT license. You can view and contribute to the source at https://github.com/expo/expo.

What language is Expo written in?

Expo is primarily written in TypeScript.

Other open-source developer tools & cli tools on OSSDrop include Oh My Zsh, VS Code, MarkItDown, Go.

Curated

Framework and platform for building universal native apps for Android, iOS, and web with React.

Developer Tools & CLI·MIT·TypeScript·51.7k stars·added 2026-08-16

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<a href="https://ossdrop.com/tool/expo"><img src="https://ossdrop.com/badge/expo" width="250" height="56" alt="Expo on OSSDrop" /></a>

Markdown

[![Expo on OSSDrop](https://ossdrop.com/badge/expo)](https://ossdrop.com/tool/expo)

What is Expo?
Expo is an open-source developer tools & cli tool — Framework and platform for building universal native apps for Android, iOS, and web with React. It is written in TypeScript.
Is Expo free and open source?
Yes. Expo is free and open source, released under the MIT license. You can view and contribute to the source at https://github.com/expo/expo.
What language is Expo written in?
Expo is primarily written in TypeScript.
What are open-source alternatives to Expo?
Other open-source developer tools & cli tools on OSSDrop include Oh My Zsh, VS Code, MarkItDown, Go.

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