The first of a thousand social apps
mu is built and hosted in Europe, on independent infrastructure. Open to all 44 million Atmosphere users today.
What makes mu different
A canvas for experimentation, starting with microblogging and expanding from there.
New features every week
A customisable news feed, post editing, and more shipping fast. Mu is a testing ground: expect something new each week.
Democratic verification
Credible organisations verify their own people and members. No single company decides who counts.
European from the ground up
Hosted in Europe, governed by European law. Built for sovereignty, away from foreign political interference.
No profiling, ever
No data profiling, no tracking. We will never sell your data.
One account, every app
mu
Eurosky's social app – be part of the future of social media
Flashes
Photo and video social sharing
Tangled
Social code platform for GitHub-style collaboration
Semble
The network for researchers
Leaflet
Easy blogging with social integration
Blento
Create your own website, the fun way
and many, many more
How it works
Create your account
Sign up for a free Eurosky account in minutes. Hosted in Europe, under European law.
Pick your apps
Your account works across dozens of apps on the Atmosphere: mu, Bluesky, Flashes, Tangled, and more. One login, everywhere.
Own your data
Your content lives on your own Personal Data Server. Switch apps anytime, take your followers with you, and stay in control.
Our vision is for a thriving open social web for Europe
We build shared digital infrastructure for a new generation of social apps: open, competitive, and built on European values. We are here for the people who use these apps, and the builders who make them.
Latest Updates
11 June 2026
Eurosky launches mu – the first of a thousand social apps
Today, Eurosky launches mu, a microblogging application that serves as the testing ground for new social media experiences, built and hosted in Europe.
15 April 2026
Introducing Portal
Portal is a new home for your web identity
18 March 2026
Eurosky Feature Requests
Do you have a feature request for Eurosky? You can add it here!
Ready to try mu?
Mu is a testing ground for the future of social media, built in Europe and open to everyone. Join us on the journey.