Product discovery & strategy
Find what’s worth
building.
Slipstream Labs helps product teams turn uncertain ideas and opportunities into evidence-backed paths forward, before committing significant engineering resources.
Evidence before build.
Assumption · Kill-line · Evidence · Decision
Stockholm, Sweden
The problem
Building the wrong thing is still expensive.
A team can go from assumption to production in weeks. But if the problem isn't real, the customer isn't who you thought, or the solution doesn't create enough value, speed only gets you to the wrong destination faster.
We've all seen it
- 01
The product nobody needed
Everyone agreed the idea made sense. It shipped. Adoption never came.
- 02
The feature that solved the request, not the problem
Customers asked for something specific. The team built it. The underlying problem remained.
- 03
AI for the sake of AI
“Do something with AI” became the goal. The technology arrived before the problem worth solving was clear.
Discovery Sprint
From uncertain idea to a decision you can act on.
A focused engagement on one product opportunity. We run it with your team: framing the problem, talking to customers, testing the riskiest assumptions together. The conclusion is one your team helped reach, so it holds up in the room afterwards.
When to use it
- A roadmap bet is about to consume a quarter of engineering.
- Two opportunities look equally plausible.
- Your team disagrees about what to build.
- You're being asked to do something with AI, without a clear problem it solves.
What you leave with
- Evidence
- What we learned, how we learned it, and where uncertainty remains.
- A recommendation
- Build it, change it, test it further, or don't pursue it.
- A next move
- A practical starting point your team can act on immediately.
You don't leave with more opinions.
Start with what must be true.
Every product idea rests on assumptions. The dangerous ones are not the assumptions you question. They are the assumptions you never name.
A kill-line is the evidence that would make us stop, change direction, or commit. We define it before we start, so momentum cannot override what the evidence says.
Find the risk
What could make this idea fail?
Find the assumption that matters most, usually whether people will value the product enough to use it.
Step 01
Set the line
What would we need to see?
Decide what real behaviour would count as enough. Interest is easy. Using, paying, or making a real commitment tells us more.
Step 02
Set it before testing
Do we all agree, in advance?
Write the kill-line down before the prototype is tested. Everyone involved agrees on it while the answer is still unknown.
Step 03
Test the assumption
What do people actually do?
Put a prototype in front of real users. Watch what happens and measure it against the kill-line, rather than what people say they might do.
Step 04
Follow the result
What does this mean for the product?
Stop. Change it. Build it. The value of a kill-line is not knowing where to draw it. It is being willing to follow it when the answer is no.
Step 05
Just because you can build it doesn't mean you should.
Speed is only an advantage when you're moving in the right direction.
About
Sebastian Bouvier
Founder, Slipstream Labs
I've spent my career working in the messy front half of products, across product management, business analysis and data in banking, telecom, logistics, automotive and fintech.
The pattern repeats: teams rarely run out of ideas. They run out of evidence, time and a clear way to choose between them.
Slipstream Labs is built around solving that problem. I work directly with product teams to investigate opportunities, challenge assumptions and find what is worth pursuing before significant resources are committed.
No delivery pyramid. No theatre. No giant report that disappears into a drawer.
Just focused discovery, honest evidence and a clear path forward.
Based in Stockholm. Working with teams anywhere.
Have an opportunity you're not sure about?
You don't need another workshop.
You need to know whether there's something worth building.
Let's investigate it.