I'm building B2B SaaS for a problem most operators can feel but none can measure
I'm Kat, a product manager turned solo founder building SippySpaces from Berlin. No external funding. In founding pilots now.
The problem I kept hearing
I spent months talking to coworking operators and event organisers. The same thing came up in almost every conversation: they know when their space is working. They can feel it. Members are connecting, conversations are happening, people are coming back because of who else is in the room.
But when someone asks them to prove it, all they have is occupancy data and NPS scores. Neither tells you whether anyone actually talked to each other.
What I built
SippySpaces is a real-time visibility layer for physical spaces. Members scan a QR code. No app download, no account creation. They appear on a live broadcast board, see who else is open to connecting, and can create or join Moments (short group gatherings around a topic or interest).
After the session, the operator gets connection data. Not just who showed up, but who connected, what they wanted to talk about, and how they rated the experience.
The product works for coworking spaces and events. The features differ slightly by context but the core is the same: make the people in the room visible to each other, lower the friction to connect, and give the operator data on what actually happened.
Where I am now
The product is live. I'm shipping updates every week and in active conversations with operators across Europe, North America, and Africa for founding pilots.
No revenue yet. That's the honest answer. Getting operators to commit to a pilot with a brand new product from a solo founder is the hardest sales motion I've ever attempted. The product resonates in every conversation, but converting interest to commitment is a different skill from building.
What I've learned so far
A few things that might be useful to other founders in the early B2B SaaS stage:
Outreach format matters more than volume. I tested two formats: a full product pitch with booking link in message one, and a short signal-based opener with one question and no pitch. The short format gets more replies. The pitch comes in message two after they've already engaged.
Your buyer has a buyer. Coworking operators don't just need to prove community value to their members. They need to prove it to their landlord, their investor, the person deciding whether to renew the lease. That second audience changed how I position the product.
No app, no account is a real differentiator. Every operator I've spoken to says the same thing: members won't use the existing portal. Building Sippy to work with a QR scan and zero setup wasn't a feature decision, it was a survival decision.
Solo founder B2B SaaS is lonely. The IH community and conversations with other founders have been the main thing keeping me grounded. If you're building alone, find your people.
What I'm looking for
Honest feedback. If you run a coworking space, an event, or any physical space where people gather and you care whether they connect, I'd love to hear whether this resonates or whether I'm solving a problem that isn't painful enough to pay for.
Also open to connecting with other solo founders building in the community/events/proptech space.
