Mesop – Open-source Python UI framework
I’m excited to share about Mesop - a new, open-source Python UI framework that enables Python developers to quickly build delightful web apps in a scalable way. A small team of us at Google have been developing Mesop as an unofficial 20% project for the past few months. A wide range of research and product teams at Google have been using it to rapidly build internal apps and we’ve gotten a lot of positive feedback internally so now we’re looking to get feedback from the open-source community. We think that Mesop provides a unique approach to building web UIs in Python - making it both easy…
In plain words
Mesop is an open-source Python UI framework that allows developers to build web applications using Python. Developed by a team at Google, it is designed for Python developers who want to create scalable web apps without extensive front-end expertise. The framework aims to be both accessible for beginners and flexible enough for customized interfaces across various use cases. It has been tested internally by multiple Google teams for building rapid prototypes and internal applications.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
I’m excited to share about Mesop - a new, open-source Python UI framework that enables Python developers to quickly build delightful web apps in a scalable way. A small team of us at Google have been developing Mesop as an unofficial 20% project for the past few months. A wide range of research and product teams at Google have been using it to rapidly build internal apps and we’ve gotten a lot of positive feedback internally so now we’re looking to get feedback from the open-source community. We think that Mesop provides a unique approach to building web UIs in Python - making it both easy to get started and also flexible enough to build customized UIs for a wide range of use cases. You can learn more about why we built Mesop here: https://google.github.io/mesop/blog/2024/05/13/why-mesop/ To look at some example Mesop apps, check out our demo gallery: https://google.github.io/mesop/demo/. Also, the demo gallery itself is built with Mesop: https://github.com/google/mesop/blob/main/demo/main.py which demonstrates the type of flexibility you have in building apps with Mesop. A couple of us will be on here answering questions. Let us know what you think!
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