Growth marketing agency Growth marketing agency for predictable growth.
Looking for a growth marketing agency that steers on pipeline instead of one-off campaigns? We build a data-driven growth engine across SEO, paid, CRO, content and lead generation.
Tanguy De Keyzer Founder & digital strategist Last updated: 1 July 2026
Trusted by growing brands
Sound familiar?
We want to grow fast, but our marketing doesn't deliver predictable results.
We do a bit of everything, but nothing really seems to scale.
I don't know which channels are actually driving our growth.
How we help
We build a data-driven growth engine that optimizes the entire funnel and scales what works, so growth becomes predictable.
Why Customer Impact
Why our approach is different.
A system, not scattered actions
We build a repeatable growth engine across the whole funnel, not campaigns that spike briefly and then go quiet.
Data in the driver's seat
We steer on leads, customers and revenue, and only scale what demonstrably works. No vanity metrics.
The full funnel
From awareness to conversion and retention: we optimize every step instead of one channel in isolation.
Small, senior team
You work directly with the people who build it, not with a junior learning your account at your expense.
About Customer Impact
The missing piece of your growth puzzle.
Customer Impact is a digital marketing agency founded by Tanguy De Keyzer. For more than 10 years we have been building the growth engine of startups, scale-ups and established companies.
Growth marketing is exactly what we exist for: no scattered actions, but a system across the entire funnel that grows predictably and delivers measurable returns.
What we stand for:
- Efficiency over volume: the right levers, not more noise
- Every euro measurable, from lead to revenue
- Marketing and sales aligned around the same goals
- Strategy and execution, under one roof
What we do
Growth marketing agency for predictable growth.
Growth audit & strategy
We map your funnel and identify where the biggest growth opportunities sit.
Experiment roadmap
A continuous stream of experiments, each with a hypothesis and a measurable outcome.
Full-funnel optimization
We work on acquisition, activation, retention and referral, not just the top of the funnel.
Rapid A/B testing
We let data decide: scale what works, park what doesn't.
North Star & KPIs
One clear growth metric the whole team steers on, plus the numbers underneath it.
Scalable channels
We find the channels that work for you and put them on an accelerated path to scale.
Compare your options
Scattered tactics, a traditional agency or a growth engine?
| Scattered tactics | Traditional agency | Customer Impact | |
|---|---|---|---|
| Approach | One-off actions | Channel by channel | One system across the funnel |
| Focus | Short-term spikes | Channel metrics | Predictable growth |
| Channels | One or two | Usually one specialism | The right mix, tailored |
| Measurability | Limited | Vanity metrics | Leads and revenue |
| Team | Ever-changing | Juniors on your account | Small, senior team |
Growth marketing only works when strategy and execution come together. We do both, steered on leads and revenue.
Our process
From baseline to predictable growth in 5 steps.
Audit and baseline
We map your funnel, channels and numbers, and find where the biggest levers are.
Growth strategy
We define the goals, the channels and the experiments that will move you forward fastest.
Experiments
We test in a focused, structured way, so you learn what works without burning budget.
Scaling
What works, we push to volume; what doesn't, we cut.
Measure and adjust
We report on leads and revenue and keep adjusting course based on data.
Growth is a system, not luck
Fast-growing companies don’t need one-off campaigns, they need an engine. Instead of betting on one big idea, we run many small experiments. Each experiment has a hypothesis, a measurable outcome and a lesson. We scale the winners and learn from the losers.
That’s how you build a predictable growth engine instead of isolated spikes. For our clients, this approach has delivered results including 250% more MQLs, 300% more conversions and 400% more organic leads.
Experimenting across the entire funnel
Where traditional marketing often gets stuck at the top of the funnel, we look at every step: how you attract people, activate them, retain them and bring them back. The fastest win often isn’t more traffic, but better activation or stronger retention.
We start with a growth audit, choose a North Star metric the whole team steers on, and build an experiment roadmap that delivers growth week after week. Fast, measurable and scalable.
Growth is a matter of systematic experimentation, not betting on one big idea. Every experiment that fails produces a lesson, and it's precisely those lessons that end up building your competitive edge.
Tanguy De Keyzer Founder of Customer Impact and digital strategist Frequently asked questions
Who is growth marketing for? ＋
For startups and scale-ups that want to grow fast and predictably, and are willing to experiment instead of betting everything on one big campaign.
How is it different from traditional marketing? ＋
Traditional marketing often stops at brand awareness. Growth marketing optimizes every step of the funnel, driven by data and continuous experiments.
How quickly will I see results? ＋
The first experiments run within weeks. Because we iterate fast, small wins compound into real, lasting growth.
Ready to win your market?
Book a meeting with our digital strategist Tanguy.