Founded by a marketer who believes growth should mean something.

We are an AI-native marketing studio helping mission-driven startups and scale-ups grow with strategic, flexible, and measurable marketing.

Stefka team at work
“We built Stefka to be AI-native from day one -- because the strongest marketing happens when human creativity meets machine intelligence.”
Stefka Ivanova, Founder

From in-house leader to studio founder.

Stefka was founded by Stefka Ivanova — a marketing leader who spent years inside startups and scale-ups, building entire marketing functions from scratch. She created Stefka to bring that same in-house ownership and strategic depth to more teams, without the overhead, the layers, or the limitations of a traditional agency.

We believe the most powerful marketing happens at the intersection of human intent and intelligent technology — two forces that, when aligned, compound into something far greater. That is the thinking behind how we work: AI amplifying strategy, not replacing it. Speed and precision in service of a clear direction.

And we are deliberate about who we partner with. We work with companies building something that genuinely matters — in sustainability, future of work, health, and impact-driven technology. When a company has a real mission, marketing stops being a growth function and becomes a signal sent into the world. We exist to make that signal as strong as possible.

10+ Years experience
30+ Projects delivered
8 Disciplines
We operate as an extension of your team — bringing experienced specialists who take ownership of outcomes, not just deliverables.

A curated team of trusted specialists.

Based in Amsterdam, we collaborate with a carefully curated network of freelance specialists -- strategists, designers, writers, developers, and producers. Each one is handpicked for their expertise and their ability to deliver at the highest level.

This model gives you access to a diverse, senior team without the overhead of a traditional agency. We assemble the right people for each project, ensuring you always get the best expertise for your specific needs.

How we work
10+ Years of marketing experience
30+ Projects delivered
8 Marketing disciplines
NL Based in Amsterdam
Distributed team collaboration

Senior specialists, handpicked for every engagement.

Emma de Vries
Emma de Vries Brand Strategist
Lucas Hartmann
Lucas Hartmann Performance Marketing
Priya Sharma
Priya Sharma Content & SEO
Thomas Bakker
Thomas Bakker Web Developer
Isabelle Laurent
Isabelle Laurent Creative Director
Marco Santos
Marco Santos Video Producer
Anna Kowalski
Anna Kowalski Growth Marketer
Jasper van den Berg
Jasper van den Berg UX & Web Design
Sofia Esposito
Sofia Esposito Copywriter
David Osei
David Osei Social Media Strategist
Emma de Vries
Emma de Vries Brand Strategist
Lucas Hartmann
Lucas Hartmann Performance Marketing
Priya Sharma
Priya Sharma Content & SEO
Thomas Bakker
Thomas Bakker Web Developer
Isabelle Laurent
Isabelle Laurent Creative Director
Marco Santos
Marco Santos Video Producer
Anna Kowalski
Anna Kowalski Growth Marketer
Jasper van den Berg
Jasper van den Berg UX & Web Design
Sofia Esposito
Sofia Esposito Copywriter
David Osei
David Osei Social Media Strategist
AI-Native from day one

The strongest marketing happens when human creativity meets machine intelligence.

We didn't add AI to an existing agency model. We built Stefka from scratch with AI at the core — in how we research, plan, produce, optimize, and report. Every client benefits from faster turnarounds, sharper insights, and marketing that compounds over time.

Explore our AI-native approach
Agentic workflows Research, briefing, and reporting run autonomously in the background — so senior time goes where it matters.
Compounds over time Every campaign cycle improves the next. Intelligent feedback loops mean your marketing gets sharper continuously.
10× execution speed Human judgment at the helm, machine speed in the engine room. You get both without compromise.

Built differently, by design.

We blend strategic thinking with creative precision to deliver results that matter.

01

Mission-driven focus

We partner with companies building something meaningful. Your mission shapes every strategic and creative decision we make.

02

Senior talent, no layers

No account managers. No unnecessary layers. Direct access to experienced specialists who own the outcome from start to finish.

03

AI-native by default

AI is embedded into how we research, create, test, and optimize. You get the speed of AI with the judgment of senior marketers.

04

Lean and flexible

Scale up or down as needed. No bloated retainers, no long-term contracts — just focused collaboration that evolves with your business.

05

Full-stack power

From strategy to design to development — we cover the full marketing stack so you do not have to manage multiple vendors.

06

Impact over output

We measure success by business results, not deliverable counts. Quality and impact always come first.

Ready to work together?

We would love to hear about your project. Reach out and we will get back to you within 24 hours.