Growth marketing agency
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: 28 September 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
We build a repeatable growth engine across the whole funnel, not campaigns that spike briefly and then go quiet.
We steer on leads, customers and revenue, and only scale what demonstrably works. No vanity metrics.
From awareness to conversion and retention: we optimize every step instead of one channel in isolation.
You work directly with the people who build it, not with a junior learning your account at your expense.
About Customer Impact
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:
What we do
We map your funnel and identify where the biggest growth opportunities sit.
A continuous stream of experiments, each with a hypothesis and a measurable outcome.
We work on acquisition, activation, retention and referral, not just the top of the funnel.
We let data decide: scale what works, park what doesn't.
One clear growth metric the whole team steers on, plus the numbers underneath it.
We find the channels that work for you and put them on an accelerated path to scale.
Our process
We map your funnel, channels and numbers, and find where the biggest levers are.
We define the goals, the channels and the experiments that will move you forward fastest.
We test in a focused, structured way, so you learn what works without burning budget.
What works, we push to volume; what doesn't, we cut.
We report on leads and revenue and keep adjusting course based on data.
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 189% more MQLs in 6 months (Facilicom), a fourfold conversion rate (Get Driven) and 400% more daily visitors in 66 days (Gom Nederland).
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 No empty promises. This is what clients say about working with Customer Impact.
“I have been working with Customer Impact for a while now and it has been a breath of fresh air from the very start. The team complements itself perfectly, so you always have someone with very extensive knowledge of specific aspects of marketing, ranging from ads to web design and strategy. The hands-on approach means you can always get started right away, and the feedback is always clear and honest. No nonsense, just facts.”
Axel D.S.
Verified review via Google
“Customer Impact built a strong new website for us and set up a lead generation approach that truly delivers results.”
Janitor Waterschoot
Verified review via Google
“They do not just execute, they also think along strategically. Real B2B specialists. Recommended!”
Jack Daly
Verified review via Google
“Sharp and fast analysis of the problem, processes and possibilities. No complicated sales talk, fast, and a first setup that works well. A bit more attention to the fine tuning. Pleasant collaboration.”
Tandarts.nl
Verified review via Google
“Smooth communication, proactive thinking and everything neatly followed up.”
Claire Farrell
Verified review via Google
“Super professional and extremely creative! They managed to adjust and respond to all of our needs numerous times. Highly recommend ❤️”
Jovana Vakic
Verified review via Google
Compare your options
| Customer Impact | Large agency | Freelancer | In-house | |
|---|---|---|---|---|
| Approach | One system across the entire funnel | Often channel by channel | Loose tactics | Depends on your team |
| Channels | SEO, paid, CRO, content and lead generation | Often a different team per channel | Usually one or two | Limited to who you hire |
| Minimum term | 3 months | Often 6 months or longer | Per assignment | Employment contract |
| Steering on | Leads, customers and revenue | Often channel metrics | Often channel metrics | Depends on goals |
| Team | Small, senior team | Changing contacts | One person | Limited to who you hire |
| Response time | Reply within 24 hours on working days | Via an account manager | Depends on availability | Immediate |
These are typical traits per type of partner, not statements about specific agencies. Growth marketing only works when strategy and execution come together: we do both.
What to expect
Week 1 to 2
We map your funnel, channels and numbers and find the biggest levers.
Week 3 to 4
We set the goals and the first experiments run within weeks.
Month 2
Every experiment has a hypothesis and a measurable result; we learn what works without burning budget.
Month 3
We put volume behind what works and cut what doesn't.
Month 4 to 6
Small wins stack up into predictable growth across the entire funnel.
Case studies
Suivo wanted to depend less on events and grow more through inbound. We developed the go-to-market, channel strategy, website and lead generation. From 2024 to 2025 the pipeline via the web rose by 142%, and 85% of the total pipeline now comes in via the web.
Fashion label A.F.Vandevorst wanted to grow online in a highly competitive fashion industry. We brought Google Ads, Facebook, website optimization, email marketing and recovering abandoned carts together in one approach. Online revenue grew by 164%, the conversion rate by 17% and 25% of revenue came from email marketing.
Read the caseGet Driven wanted to grow fast in several markets. We combined branding, a new website and conversion optimization with a booking flow in three steps. Conversion rose from 1.8% to 7.3% and bookings by 287% in 3 months.
Read the caseIn all honesty
You have surprised me in multiple ways the last few weeks.What I'm seeing today on the screen is really cool. I think this is modern growth marketing.Contact us
Briefly tell us what it is about. You get a personal reply from Tanguy or someone from the team, not a call centre.
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.
Traditional marketing often stops at brand awareness. Growth marketing optimizes every step of the funnel, driven by data and continuous experiments.
The first experiments run within weeks. Because we iterate fast, small wins compound into real, lasting growth.
The pipeline shifted from event-driven to inbound, with the website as the engine.
Organic traffic converted 38 times better than paid: positioning, topical SEO and paid in one growth engine.
A complete rebrand and a fast mobile-first website, in 4 markets.