Venture Studio

Find out if your business idea is stupid... or not.

Stupid.Capital is a venture studio that validates digital ideas and builds what proves itself. We focus on what works, not what sounds good. We build our own ventures and co-found with partners who aren't afraid to test if their idea is actually stupid or not.

See our ventures

idea

product

ads

traffic

landing page

funnels

fulfilment

processes

Clarity01

Validation02

Traction03

Scaling04

Active venture

€10K+ MRR

Founder as CEO

Scroll

The Studio

What we're building right now.

Four ventures in build, validation, or scaling. Some are ours. Some we co-build with partners. All of them had to prove they work before we committed.

Marketing Since 2024

SOULx Agency

Digital Performance Marketing Agency

Trilingual performance marketing across EN, NL, and DE. Media buying, creative production, growth. The operational core our other ventures pull from, and a standalone agency for outside clients.

www.soulx.agency

Active venture · Scaling

HR Tech 2026

Switchd

Digital Recruitment Platform

Performance recruitment. Matches on intent, skill, and momentum instead of resumes. Co-founded with Heroo VOF. Currently in validation with agency and D2C hiring managers across the Netherlands.

www.switchd.eu

Validation phase

Hospitality SaaS 2026

Digital Reservation &
Payment Platform

Hospitality Operations

Reservation and payment infrastructure for hospitality operators who've outgrown Uber Eats-tier tools. Currently stress-testing the go-to-market thesis with restaurant and hotel owners before we start building.

Coming soon, get notified

Clarity phase

D2C Subscription 2026

Longevity Supplement
Subscription

D2C Wellness

Daily longevity gummy with an EU-based subscription model. GMP-certified Polish manufacturer, tester feedback loop already running. Positioning and pricing being validated against pre-launch signup demand.

Coming soon, get notified

Validation phase

Open to collaborate

Have an idea worth building? Send us your stupid idea.

About Us

Operators turned venture builders.

Stupid.Capital is what happens after years of building inside other people's companies. We took everything we learned, and turned it on ourselves.

For years, we operated inside more than 50 digital companies across BeNeLux. We scaled D2C brands, ran performance marketing at significant budgets, built and broke acquisition channels in 10+ markets, and studied what separates the top 5% of online businesses from the rest.

We learned what actually moves the needle. Not hype. Not quick advice. We focus on what works, not what sounds good. Data over opinions, lean structure over noise. The kind that makes growth repeatable, not accidental.

Stupid.Capital is what we built once we knew enough to build for ourselves. We generate the ideas. We co-found the companies. We build the operations and teams. Then we scale. Our four-phase playbook takes a venture from clarity to scaling, and you can see the ones already in build right now. We're not advisors. We're not passive investors. We're co-builders. If you're wondering how we structure equity or who owns the IP, that's all in the FAQ.

Before Stupid.Capital

That's not our pitch. It's our training.

Digital companies built or scaled

€0

Performance budget deployed

Markets entered & validated

Top 5%

Online business models studied & replicated

The Team

The operators behind it.

Souleiman Soulami

Founder & Venture Builder

Dutch entrepreneur with operating experience across the EU. Founder of companies in the Netherlands, Berlin, and Estonia. Combines inside-the-platform discipline (Ex-Meta) with the hands-on rigor of building from zero.

Connect on LinkedIn

Eva Butzküben

Marketing & Community Lead

Performance marketer with a sharp eye for community. Leads marketing strategy, brand positioning, and the networks that surround every Stupid.Capital venture. Connects data, audience, and growth.

Connect on LinkedIn

The Method

How we build.

The same four-phase approach we use on every venture. Whether we generated the idea or co-build with a partner, the playbook is the same: validate before we build, build before we scale.

Clarity

Confirm that real market demand exists for your idea. Customer research, competitive positioning, and business model mapping. We start with clarity, not assumptions.

Weeks 1–4
Clear demand signal or fast pivot

Validation

Prove customers will pay. Paid acquisition testing, funnel optimization, and initial unit economics measurement.

Weeks 5–12
€1–5K MRR, validated CAC/LTV

Traction

Scale proven channels and build operational infrastructure. Team structure, SOPs, financial dashboards, and margin optimization.

Months 3–6
€5–10K+ MRR, operational systems

Scaling

Transition to self-operating business. Strategic guidance, market expansion. Equity stake (5–49.5%) taken at €10K+ MRR milestone.

Month 6+
€10K+ MRR, founder as CEO

The Blueprint

Two tracks.
One operating playbook.

We build two types of companies. Ideas we generate and execute ourselves. And partner ventures, where we come in as operators to a founder who already has something real. Both run through the same discipline.

Track 1

Internal ventures

Ideas we generate, validate, and build ourselves. We bring the thesis, the team, and the capital. From zero to scale.

Generated and led internally
D2C, SaaS, subscription, marketplaces
Built with our own playbook
Open to operators who want to co-lead

Track 2

Founder partnerships

You have an idea or initial traction. We become your operating partner. We co-build the company, share the equity, scale together.

Idea or early-stage traction welcome
D2C, subscription, SaaS, digital models
5–49.5% equity stake at €10K MRR milestone
Operational discipline over pure intuition

The Invitation

Find your path with Stupid.Capital.

Three ways to plug into what we're building. Pick the one that fits. We'll take it from there.

For founders

Send us your stupid idea.

You have an idea worth building, or early traction that deserves an operator. We validate it with you, co-build the company, and share the equity at €10K MRR.

Pitch us →

For operators

Come build with us.

Ops-heavy people who want to run a venture from clarity to scaling. Growth, product, engineering, ops. We hire for ownership, not roles.

Get in touch →

For partners

Co-invest or co-brand.

Investors, agencies, or corporates who want to plug into a venture at Traction or Scaling stage. We share deal flow, structure, and diligence openly.

Talk to us →

Common Questions

What founders ask us.

The questions we get most often, answered plainly.

We take an equity stake of 5–49.5% once the venture reaches €10K MRR. Below that milestone, no equity changes hands. The exact split depends on your stage, our contribution, and the deal structure. Always negotiated openly, always written down.

Neither, really. We work for equity, not fees. We don't take cash. For internal ventures, the studio funds early operations. For partner ventures, we bring operational capital and skill, you bring the idea or initial traction.

We work with founders from raw idea to early traction. If you already have €10K+ MRR, you probably don't need us. If you've got a clear thesis and the discipline to execute, we're a fit. Everything in between, we'll figure out together.

We build long-term. Most ventures take 6 to 18 months to reach the €10K MRR milestone. After that, we stay on as co-owners and operating partners until the venture is self-running or exits.

We don't lock anyone in. If the venture doesn't hit milestones or the partnership stops working, we have a clean exit clause. No drama, no lawyers. We'd rather not work together than work together badly.

For internal ventures, yes. For partner ventures, only when our equity stake makes sense for it. We're not in this for governance theatre. We're in it to build.

Smart money rushes to scale. We rush to clarity. We test before we build. We validate before we spend. We say no to flashy ideas with no demand. Sometimes the smartest move looks stupid. That's the name.