[Case study image]
Fieldstone Software
A B2B SaaS founder selling to operations teams. We rebuilt their web design from scratch.
3.2x
Return on investment
−41%
Cost per result
What We Do
Websites that close the deal.
Advantage is a results-driven Web Design and Development agency for founder-led companies of two to fifteen people in the Netherlands and across the EU. With millions in attributable revenue generated for fast-growing founder brands, we know what it takes to turn web design into scalable growth.
We take a performance-focused approach: every piece of work is measured against the outcome it exists to create. By combining sharp positioning, disciplined testing, and honest measurement, we deliver pages, sites, and design systems that drive measurable results while keeping costs under control.
Because your website is where every campaign either pays off or leaks, we design for conversion first and decoration second. Our expertise in UX, fast builds, and analytics ensures every page has a measurable job and does it.
Whether you need one landing page or a full rebuild, our sites are built to make founder-led brands look credible and convert consistently.
Contact UsCompany Stats
We have generated over €2.9M in attributable revenue for our clients and continue to drive profitable growth every day.
€2.9M
Rev Generated
With over 13 years of experience, we have a deep understanding of founder-led marketing and continuously refine our strategies to stay ahead.
13+
Years Of Experience
We’ve helped founder-led companies of all sizes and sectors build stronger brands and better converting campaigns to increase traffic, sales and revenue.
107
Clients Served
Our Approach
Web Design and Development Agency
UX and Structure
Site architecture designed around the visitor’s decision, not the org chart.
Every page has one job and a next step.
Design and Brand
Interfaces that look credible in your category and load before the visitor doubts you.
Distinctive, but never at the cost of clarity.
Build and Performance
Fast, maintainable builds with clean CMS setups your team can actually edit.
Speed is a feature: it converts and it ranks.
Measurement and Testing
Analytics and A/B testing wired in from day one, so the site keeps improving after launch.
A website is a system, not a brochure.
Why choose Advantage?
We build websites that convert visitors into customers.
We measure our work by the revenue it creates, not the hours we bill. When your campaigns grow profitably, we keep the engagement; when they do not, we have a problem to fix.
That alignment shapes everything: budgets we recommend, tests we prioritize, and the honesty of our reporting.
Every founder-led brand hits a different bottleneck: weak creative, wrong audiences, leaky landing pages. We diagnose what is actually holding your funnel back before we spend a euro.
The campaign structure is then built around that diagnosis, not around a template we reuse for every client.
Web standards change constantly. New formats, channels, and tactics appear constantly, and the advantage goes to whoever tests them first.
We run structured experiments on a slice of budget, so your account learns faster than your competitors’.
Scroll-stopping creative does not come from stock footage and generic hooks. It comes from the specific, opinionated voice of the person who built the company.
We turn that voice into short video hooks, carousels, and statics designed for the feed, not adapted to it.
Every euro you invest is tracked to the work that produced it, wired through proper conversion tracking.
Monthly reporting ties spend to pipeline: which ad, which audience, which euro of return. No vanity metrics.
Many agencies rely on guesswork, but at Advantage every engagement is carefully scoped to maximize efficiency, revenue, and return on investment while minimizing waste.
We scale what works and cut what does not, keeping your cost per result trending down as we go.
Our incentives are aligned with yours.
We measure our work by the revenue it creates, not the hours we bill. When your campaigns grow profitably, we keep the engagement; when they do not, we have a problem to fix.
That alignment shapes everything: budgets we recommend, tests we prioritize, and the honesty of our reporting.
Testimonials
Success stories
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Northline Consulting
A seven-person consultancy that relied entirely on referrals. A rebuilt web design engine became their first predictable source of leads.
2.4x
Inbound leads per month
€38
Cost per qualified lead
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Halte Studio
A design studio launching a productized service. Sharp web design and smart follow-up turned site visitors into paying clients.
5.1x
Return on investment
+112%
Revenue growth in 6 months
01.
Audit and Assessment of Your Current Web Design and Development
We start by evaluating everything you have today: what exists, what performs, and what is quietly holding results back. The audit gives us a clear baseline and a shortlist of the highest-impact improvements.
You see exactly what we found and why it matters, in plain language. No jargon, no filler, just a prioritized plan.
02.
Strategy and Planning
We align on goals, audience, and scope, then translate the audit into a concrete roadmap: what we will build first, how success is measured, and when you will see it.
Budgets and timelines are agreed up front, so there are no surprises later.
03.
Design and Build
Our team gets to work producing the pages, sites, and design systems. You review at agreed checkpoints, and your voice and brand stay at the center of everything we make.
We work in fast iterations, so you see real output in days, not months.
04.
Launch and Quality Assurance
Everything ships through a structured launch checklist: tracking verified, edge cases tested, and every detail checked on real devices before it goes live.
From the moment it is live, we collect data on how it performs in the real world.
05.
Measurement and Ongoing Optimization
We monitor performance against the benchmarks we set, double down on what works, and fix what underperforms. You get a clear monthly report that ties the work to revenue.
Optimization never really ends: each cycle of data makes the next round of work sharper.
[Phone: social ad]
[Desktop: client website]
[Phone: client website]
[Desktop: client website]
[Phone: social post]
[Desktop: client website]
Advantage
Web Design and Development Services
01.
Website Audits
A conversion and performance review of your current site, with a prioritized fix list.
Know what to fix before you rebuild.
02.
Conversion-Focused Web Design
Design that makes the next step obvious on every page.
Credibility and clarity over decoration.
03.
CMS Development
Clean builds on modern platforms your team can edit without a developer.
Fast to load, easy to maintain.
04.
E-commerce Builds
Stores designed around the purchase decision, from product page to checkout.
Fewer clicks between want and bought.
05.
Site Speed and Technical SEO
Performance and crawlability fixed at the foundation.
Speed converts and ranks.
06.
Copy and Content Integration
Design and copy built together, so neither fights the other.
Message and layout, one system.
07.
Analytics and Tracking Setup
Every form, click, and sale measured from day one.
A site you can steer by numbers.
08.
Maintenance Retainers
Updates, fixes, and improvements handled month to month.
Your site never quietly rots.
09.
A/B Testing Programs
Structured tests that compound conversion gains over time.
Small wins, multiplied by all future traffic.
Web Design and Development FAQs
Your website is the one salesperson that meets every prospect. If it is slow, confusing, or generic, every euro you spend driving traffic to it is discounted before it lands.
Before we start, we look at your offer, audience, and current numbers to confirm the economics work. If we do not believe web design can pay for itself for your brand, we will tell you, and suggest a better place to invest instead.
Most engagements are a fixed monthly scope agreed up front, so you know the deliverables and the price before we start. You can scale the scope up or down as your needs change, and there are no long-term lock-ins.
You will see it in the numbers, not in our opinion. Every month you get a report that ties the work to results: conversion rates and site speed scores, and revenue attributed to it. If something is not working, the report shows that too, and what we are changing.
Less than you expect. We need your input where it matters most, usually a short kickoff and a few hours per month, and we handle everything else. Founders typically spend two to four hours a month with us.
Great, that gives us something to work with. We start with a full audit of what you have, keep what performs, and rebuild what does not. Existing material usually shortens the path to results.
You do, always. Everything we create is yours: accounts, source files, and data. If we ever part ways, you keep it all and nothing breaks.
Some improvements show up within weeks; the compounding effects build over months. We set expectations per deliverable in the strategy phase, and our monthly reporting shows you the trajectory from day one.
Yes. Web Design and Development works best as part of a system: positioning, content, campaigns, and follow-up. As a full go-to-market agency for founder-led companies, we can take on as much of that system as you need.
Because our model is built for companies like yours. We work exclusively with founder-led teams of two to fifteen people, we measure ourselves on revenue rather than impressions, and you work directly with senior people, not an account manager reading from a script.
Contact
Let’s build the engine behind your growth. We will come to the call with a point of view, not a pitch.