English / Dutch I’m Bart Stemkens, a freelance marketing lead. I help SaaS and app-based companies design and execute marketing strategies focused on visibility, leads, and active users. I combine strategy and execution, from ads to CRO, from roadmaps to data. With over 11 years of experience, I’ve worked with startups and scale-ups like Squla, StudyGo, KIMO, and Valyuu, as well as corporates like Nationale Nederlanden and Nescafé.
You can hire me from 1 day per week for:
- Designing and implementing your marketing strategy or growth roadmap
- Temporary support as a freelance or interim marketer
- Coordinating agencies and specialists
- Setting up or optimising specific channels or projects (like SEO, SEA, display, or affiliate)
Prefer a one-off analysis instead? Go for the “just-tell-me-what’s-wrong” Growth Audit ($999): a compact, no-nonsense audit packed with clear insights and actionable ideas.
👉 Book a free video call or call me directly at +31683329344.
My specialities
Growth strategy & roadmap
Tell me your ambitions and I’ll map out the growth opportunities, plus the order in which to tackle them.
SEO & GEO
More visibility without ad spend, across search engines and emerging AI engines.
CRO & activation
Build hypotheses, run tests and lift both activation rates and conversions.
Performance marketing
Profitable online advertising on Google, LinkedIn, Meta and more, from strategy through full technical setup.
Marketing automation
Lead scoring, nurture flows and automated follow-ups that keep you top of mind.
Tracking & data analytics
I connect the tools and set up a weekly reporting dashboard, so progress is crystal-clear every Monday.
Highlighted results
These are some of the outcomes I achieved in recent projects, results I can deliver for you as well.
- Studira grew from zero to 5,000 paying users in 14 months with a 90% trial-to-paid conversion thanks to the acquisition strategy I designed. Read the case.
- KIMO reached 150,000 app users in 10 countries after we rolled out my acquisition plan. Read the case.
- Bieden & Wonen scaled its franchise network from 3 to 10 locations in two years through the growth strategy I built. Read the case.
- Chirpley onboarded 20,000 influencers in its first year with the GTM strategy I created. Read the case..
But numbers only tell half the story. This is how clients describe working with me:
“Bart is a multi-skilled professional able to make your business grow. He can handle high levels of complexity, and is pleasant to work with at all times.”
— Rens, CEO @ KIMO“With Bart, you have everything you need to grow and scale—no extra resources required. If you could clone him, you’d leave your competitors in the dust.”
— Sarah, Head of Growth @ Small Improvements“Smart, pragmatic, hard-working, and a great guy to have around. Our intake doubled, and costs were cut in half. Bart takes initiative, makes decisions, and gets things done.”
— Marnix, Proposition Manager @ Nationale-NederlandenClients
The companies below give an idea of who I work with. I am not tied to any one sector, but lately I have focused on SaaS and app companies in EdTech, social media, HR tech and FinTech, serving both B2B and B2C markets.
- Squla
- Nationale Nederlanden
- Nescafé
- StudyGo
- Bieden & Wonen
- Klup
- Legal Fit
- Biedboek
- Financieel Gezond
- Chirpley
- Zoegas
- Valyuu
- Small Improvements
- Nestlé
- Innoleaps
- Closure
- Stekkies
- KIMO
- DFNS
- RFM
- 4S Real Estate
FAQ
Get in contact
👉 Book a free video call or call me directly at +31683329344.
