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.

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Who we are

J 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.

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J floor community

J floor space

Let's be clear

We do not take equity or fees

J floor is built bottom-up by the community. Sponsors cover the costs.

We do not take equity or fees

J floor is built bottom-up by the community. Sponsors cover the costs.

We don't run cohorts

No overhead, programs or mentors. All support comes through organic interactions with other founders.

We don't run cohorts

No overhead, programs or mentors. All support comes through organic interactions with other founders.

We back bold ideas

No freelancers and casual users.

We back bold ideas

No freelancers and casual users.

Our Story

J floor emerged from a community of 50+ builders at the ETH Student Project House (SPH). Since 2023, this community has quietly become a prolific sources of exceptional founders who started in Europe and are now spread all over the globe.

We spent days and nights building on the floor J of the SPH, helping each other turn projects into growing ventures. We saw firsthand that success can be just a few launches away.

The recipe: Fill a room with brilliant people and let the magic happen.

active founders