J floor
Build in Zurich.
Capture the world.
We give brilliant founders the space to gather. A place to meet, commit, and believe before the world does.
Apply to joinJ floor is a community of founders, anchored around a space. In the heart of Zurich.
For solo founders and small teams at the earliest stages. Students, recent grads, big-tech dropouts, and anyone wired to build.
Everything early-stage fits here: messing around with tech, getting first customers, building momentum, …
No equity. No fees.
Our first 6 months
J floor grew out of a community of builders at ETH and, since opening its first spaces in February 2026, has become the reference point for ambitious early-stage founders in Zurich.
Founders build alongside each other, share knowledge and connections, and help turn early projects into funded companies.
The recipe is still simple: Fill a room with brilliant people and let the magic happen.
Active founders
115+
Projects
55+
Raised by members
27M+
