Ad Creative
AI-generated image and video assets built around your brand, not a template. Iterated each cycle based on what actually performs.
Full Growth-Stack
We handle the ads, the landing pages, the analytics, and the follow-up. You get a clear report on what moved and what's next. Built for B2B companies that sell physical products.
Established
2026
The Problem
Most brands know they're leaving money on the table. They just can't see where.
Agencies bill for hours and meetings. Freelancers hand off and vanish. Internal teams rarely own the full picture from ad to close. So your acquisition costs drift up, your funnel has gaps, and nobody has a straight answer.
What B2B product companies usually need isn't more tools. It's someone who owns the whole chain.
The brief goes in.
Six weeks later, something ships. Nobody is quite sure what changed.
The reporting looks busy.
Clicks, impressions, reach. Nobody can say what it returned.
The retainer renews.
Results are hard to attribute, so it's easier to keep paying than to stop.
Service Pillars
Four Outputs. Every Month.
You know exactly what's arriving before we get on the call. No surprises.
Landing Pages
Built in Astro. Fast by default, tracked from day one, designed to convert without looking like everyone else's page.
Analytics Setup
PostHog wired to your real events, not just pageviews. You see where users activate, where they drop, and what to fix.
Email Sequences
Triggered by what users do, not a drip calendar. Built in Resend. Activation, re-engagement, and close.
How it works
Discovery
One call. We understand your product, your current setup, and where you want to go.
Build
Astro ships in days. 95+ PageSpeed out of the box.
Instrument
PostHog connected to your real events before anything goes live.
Iterate
Monthly sprints. We cut what isn't working and push harder on what is.
Who It's For
Built for B2B Companies
Built for B2B Companies
That Sell Real Things.
B2B Companies With a Physical Product
You sell something real and you need buyers to find you, trust you, and convert. We build the ads, pages, and follow-up systems that make that happen consistently.
Businesses Scaling Paid Acquisition
You are spending on ads but results are inconsistent. Creative goes stale, ROAS drops, and you are not sure what to fix. We rebuild it properly.
Teams Without a Dedicated Growth Person
You have a strong product but no one internally who owns acquisition from top to bottom. We come in and run it without the cost of a full hire.
Companies That Got Burned by Agencies
Slow delivery, vague reporting, work passed through three people before it reached you. We work directly with you and you see exactly what is being done.
We're probably not the right fit if…
- Businesses with no product or market validation yet
- Companies who spend less than 3,000 EUR per month on ads
- Anyone who needs something built tomorrow with no brief
Transparent Pricing
Pick Your Starting Point
No hidden fees. No lock-ins on the one-offs. Start where it makes sense and scale when you're ready.
One-off
Starter Pack
€799 one-time
Everything you need to start running paid ads. Ready-to-launch creative assets build for product brands
- 6 Image Ad Creatives
- 1 Motion Ad
- 1 × 15–20 sec advertisement
- All source files included
- 1 hour of revisions
Most Popular
Scale Plan
Starting at
€1,999 / month
For product brands that want to want ongoing creative testing, optimisation, and direct support after the initial setup.
- Everything in Growth Pack
- Up to 5 hours in monthly revisions
- A/B testing (ads, copy)
- Negotiable ad volume (price adjusts)
- Direct email access to the team
- Monthly Loom performance update
- Ongoing optimisation each sprint
- Negotiable Contract Length
One-off
Growth Pack
€2,499 one-time
The full setup for product brands that need stronger creatives, a conversion-focused landing page, and the system behind it.
- Everything in Starter Pack
- 2 hours in monthly revisions
- Conversion-optimised landing page
- PostHog analytics integration
- Resend lead nurturing setup
- Full handoff with documentation
Scale Plan pricing adjusts with ad volume. Let's talk if you need something custom.
Why STK
A Different Kind of Growth Partner.
No Middlemen
You talk to the people doing the work. Not an account manager relaying messages.
Full-Stack Scope
Ads, pages, tracking, email. One team handles all of it so nothing gets lost between handoffs.
Brand-Trained Creative
Every ad is built around your visual identity, not a template. AI speed, without looking like everyone else running AI ads.
7-Day Delivery
Brief to live in a week. We scope tight and ship fast.
The People Behind It
Full-Stack Growth · Engineering
Serafim Krastev
Growth Engineer
Builds and runs the full growth stack. Writes the code, reads the data, ships the work.
LinkedIn →
Creative · Brand & Visual
Stefan Kolev
Creative Director
Turns growth objectives into creative that actually makes people stop scrolling.
LinkedIn → Ready When You Are
Let's Talk Growth
Tell us about your product and where you're trying to grow. We'll come back with a clear picture of how we can help.
- ⚡ Usually reply within a few hours
- ◎ You talk directly to the people building your stack
- ✓ No obligation, no hard sell
Common Questions
Everything You Need to Know
What does a growth marketing agency do for B2B product companies?
We build the acquisition infrastructure around your product. That means ad creatives that bring buyers in, landing pages that convert them, tracking that tells you what worked, and email sequences that follow up. Most B2B product brands have the product but not the system to sell it consistently online. We build that system.
How much does it cost to work with STK Agency?
Engagements start at 799 EUR for a one-time creative package and 1,999 EUR per month for ongoing retainer work. The right starting point depends on your goals and how much you have available for ad spend alongside the retainer.
Do you manage our ad campaigns?
No. We build the creative assets, landing pages, and tracking infrastructure, then hand everything over so you run the ads yourself or through your existing setup. You stay in full control of your budget at all times.
What ad budget do I need to get results from paid advertising?
We work best with brands spending at least 3,000 EUR per month on paid media. Below that threshold there is not enough data moving fast enough to run meaningful creative tests or produce reliable attribution.
What platforms do B2B product companies advertise on?
It depends on where your buyers are. Most B2B physical product brands start with Meta and LinkedIn. We build creative assets optimized for both and you deploy them on whichever channels fit your audience.
How do you measure whether the creative is actually working?
We wire PostHog to your real events, not just pageviews. You get visibility on the full customer journey from first click through to conversion. You will always know what you spent and what it returned.
What is AI ad creative and how is it different from regular ads?
AI ad creative uses generative tools to produce visual assets and copy faster and at higher volume than a traditional production process. Every asset we build is tailored to your brand identity and designed to be tested against real performance data. AI speed without the generic output.
Do you replace our existing marketing team?
No. We layer on top of what you already have or help you cut what is not working. Your stack, your data, your ownership. Everything we build stays with you.
What happens after I get in touch?
We schedule a discovery call to understand your product, your current setup, and your goals. From there we put together a clear proposal covering what we would focus on first and why. No pitch deck, no pressure.
How is STK Agency different from other marketing agencies?
Two people own your entire engagement from creative to infrastructure. No account managers, no handoffs, no briefing chains. You talk directly to the people building the work.