About STARK • Digital agency for online marketing in Heidelberg

About STARK · Digital agency Heidelberg

Growth that pays off.*

One team takes care of your entire online marketing: SEO, Google Ads, web design and social. We back every recommendation with figures and tell you honestly up front what is worth it and what is not. The first audit costs you nothing.

* We are an agency, not a miracle worker. We do not promise specific rankings or turnover figures within a fixed timeframe – that would be unprofessional. What you get from us: an honest audit, clean implementation and figures that you can check for yourself.

4,97/5
ProvenExpert · 87 reviews
+340%
Avg. visibility (median)
150+
Projects since 2016
since 2016
in business
from
Heidelberg
54
Google reviews
31
ProvenExpert reviews
97%
Recommendation rate
4.97/ 5
Overall rating based on 87 reviews
// letter from the owner 21 May 2026 · Heidelberg

Marketing is exhausting. Especially when you’ve been doing it for ten years.

If you’re reading this page right now, you’ve probably already worked with two or three agencies. Most of them suggested whatever happened to be in their portfolio. Some sold you LinkedIn carousel hacks. One might have had a nice founder, but no team behind them.

We know this because we experienced it on our own projects too. Before we founded STARK in 2016.

What you probably don’t want:

  • An agency that sends you reports but doesn’t explain what they mean.
  • Four different contacts for SEO, ads, design and social.
  • Pretty PowerPoints about "holistic growth strategies".
  • 12-month contracts before anything has been delivered.
  • Pitches that make it sound as if everything will grow within four weeks.

What we try to do instead:

  • One member of the team is your point of contact. Across all four disciplines.
  • You’ll receive a weekly update. Even if nothing major has happened.
  • We talk about figures rather than adjectives. That’s why we set up tracking first.
  • No twelve-month lock-in: cancellable quarterly. We have to win you over with results.
  • If the audit shows that we are not the right partner, we will say so. And we will refer you elsewhere with a recommendation.

Sounds unspectacular? It is. Marketing is a craft and has long since stopped being a miracle business. We practise this craft so carefully that it pays off for you.

~ Joshua

Joshua Stark · Managing Director · stark.marketing GmbH

two ways

Done-for-you or hand-in-hand. Both work.

Some clients want a team to take care of everything. Others want a sounding board for their in-house set-up. We do both, but never both at the same time for a single client, as otherwise no one would know exactly who is responsible for what.

recommended
Done-for-you

STARK takes over

We take care of set-up, management and optimisation. You get the results and an update every week.

A good fit if you have no in-house capacity, want to grow quickly and need a partner to look after your entire marketing stack.
  • One dedicated contact for all four disciplines
  • Weekly stand-up calls, monthly strategy review
  • Full tool licences (Sistrix, Ahrefs, GTM, Looker) included in the retainer
  • Direct WhatsApp channel to the team
  • Cancellable quarterly, no long contract terms
  • Audit guarantee on the first audit (see below)

Monthly · 90-day minimum term

Request a consultation →
Audit & Consulting

STARK supports

We provide the audit, roadmap and setup; your team will carry out the implementation. We’re on hand as a sparring partner should you have any questions.

A good fit if you have a strong in-house marketing team that needs an outside perspective, senior sparring or tool setup.
  • 40-page audit PDF with a prioritised roadmap
  • 4-hour workshop for your in-house team
  • Tool stack recommendation & setup guide
  • 30 days of WhatsApp support for follow-up questions
  • Optional 90-day retainer afterwards
  • No ongoing obligations

One-off · no ongoing commitment

Request the audit package →
The STARK team working in a relaxed atmosphere on laptops in the office in Heidelberg
One team

The same people for web, SEO and ads.

We don't pass your project on to freelancers, and we don't have departmental boundaries either. Whoever plans it also delivers it, at one table in Heidelberg.

methodology

The STARK playbook. Six steps, refined since 2016.

We have supported over 150 projects. This has resulted in a playbook that we apply to every new project – and tailor individually to each one.

Six steps that every project goes through.

Instead of pitches and PowerPoints, there is a proven process from audit to scaling. You always know which phase we are in and what comes next.

See the playbook in action →
stark_playbook.ymlv 4.7
01_audit:Identifying the status quo & levers
02_strategy:Roadmap with clear KPIs
03_setup:Tracking, tools, team sync
04_build:Clean implementation, weekly reviews
05_iterate:A/B testing, monthly adjustments
06_scale:Expand what works
figures

Honest figures. Median, not best-case.

Across all projects from the last 24 months. We don't cherry-pick. If a project went less well, it goes into the median. That's why our figures look more sober than the "+1000% success stories" of other agencies.

+340%
Visibility lift
Sistrix DACH, median after 12 months of collaboration.
9 months
Time to result
Avg. months to visibility peak after launch.
4,97/5
ProvenExpert
Based on over 80 verified reviews.
120+
Projects
Since 2016 for SMEs, SaaS & e-commerce.
Joshua Stark with a MacBook in front of Heidelberg Castle and the River Neckar
From Heidelberg

Rooted locally, booked nationwide.

Our office is on the Neckar; our clients are spread across the DACH region. For us, being close means short lines of communication and genuinely being reachable – not a postcode on a business card. As an advertising agency in Heidelberg, we know the regional market and help local businesses become visible in the region with targeted local SEO support. Outside the region we work in exactly the same way, for example with social ads for clients across Germany. There are dedicated pages for the SEO agency in Mannheim, the SEO agency in Stuttgart and the SEO agency in Frankfurt, as well as for clients in Hamburg and clients in Cologne.

Testimonials

What clients say about working with us.

Reviews from Google and ProvenExpert, translated from German.

★★★★★ 4.97 / 5 87 reviews · ProvenExpert
★★★★★

By far the best SEO agency we have worked with so far. Anyone who wants to rank at the top of Google for the long term without worrying about running out of customers should definitely get in touch with Joshua and his team!

Dominik SchererEmotional Perspective · Google
★★★★★

I never would have imagined what can be achieved with ads and SEO. Stark.marketing really surprised me. […] As a fan of statistics, I got to watch my site climb higher and higher :D fantastic! […]

Lisa HessDie Kitafotografin · Google
★★★★★

[…] From the initial contact and planning, through to implementation and follow-up, everything went to our complete satisfaction. […] After several bad experiences with external agencies, we have found a partner in stark.marketing whom we would be happy to commission for future projects as well.

Alexander HassScholarbook GmbH · ProvenExpert
★★★★★

Mr Stark and his team have helped my company achieve a huge amount of visibility. The website they created has been praised from all quarters. I’m receiving lots of enquiries via Google. I can say: “It’s a complete success!”

Fabian KaufmannArboreal Baumpflege · Google
★★★★★

Really impressive! The expertise and advice on Google Ads were astonishing. Great expertise in the field of Google Ads. It really makes a huge difference what’s possible with a well-structured and well-thought-out Google campaign. Thank you very much for that!

Sandra SchulzeGoogle
★★★★★

[…] All staff members know what they’re talking about and are not only competent in all aspects of online marketing, but also friendly, reliable and always open and available to answer questions and address other concerns. I highly recommend them!

Laura EhrhardGoogle
★★★★★

A really young and competent team! Right up to date and with a keen sense of the client’s needs. Professional analysis and personalised advice and support, even in the long term. […]

Dennis AnthoferGoogle
★★★★★

An excellent web marketing agency; highly recommended. We had our website developed by Stark.Marketing and received top-quality work. Their network (photographers, video producers, etc.) is also first-rate.

Uwe D. WucknitzSparring for Success · Google
★★★★★

Top agency if you need a website and also want SEO that actually works. Communication with the MD and the team is very straightforward and friendly 👍🏻

Thomas HenschelGoogle
★★★★★

It is a real pleasure to work with stark.marketing GmbH. Their service and communication are excellent, and they are highly competent in their field! […]

Tanja HammelGoogle
★★★★★

We wanted an attractive yet user-friendly website and had quite specific ideas in mind. It was impressive to see how well our ideas were implemented in the web design and even enhanced. For example, stark.marketing also incorporated social media.

Maximilian BlischkeGoogle
★★★★★

Top-level SEO and excellent advice. I can’t recommend them highly enough!

Andrea Grundmann45 Grad digital · Google
★★★★★

We had our website created here. Communication, implementation and ongoing support were absolutely top-notch! You’re not left to your own devices and receive super-fast replies and proactive help!

Jan HübnerGoogle
★★★★★

[…] A strong partner for SEO and other online matters. We are always satisfied and greatly value the creative work of Mr Stark and his entire team. […]

Ben BoukhalfaGoogle
★★★★★

Excellent service, quick to implement, sticks to deadlines and agreements – which isn’t all that common in this industry. I can wholeheartedly recommend this company.

Anke HeinesGoogle
★★★★★

[…] The website, including all subpages, was implemented in a stunning modern design as agreed. All pages display very well on all devices. […] Very professional and straightforward communication. […]

Thorsten SchmittGoogle
★★★★★

I can warmly recommend STARK Marketing. The search engine optimisation works brilliantly. Many thanks to the team!

Ulrike GaffgaGoogle
★★★★★

The STARK team is readily available and provides us with highly professional and prompt support.

Elisabeth DenkAPI Metrology · Google
AUDIT
GUARANTEE

We take the risk out of the first step.

Every project we undertake starts with a free 30-minute audit. If the audit does not identify any specific areas for improvement that would be worthwhile for you, we will refer you onwards with a recommendation – to an in-house solution, another agency or a freelancer.

You invest half an hour; we invest the time in the audit. At worst, you’ll have one more honest assessment. At best, a partner for the coming years.

faq

The most common questions, answered honestly.

How much does it cost to work with STARK?

Done-for-you runs as monthly support with a 90-day minimum term; audit + consulting is a one-off. You will receive specific quotes after the audit, as they depend on the scope.

How quickly will we see results?

Technical SEO fixes take effect in 2 - 6 weeks. Content-driven growth in 6 - 9 months. Performance campaigns deliver the first reliable data after 4 - 6 weeks. Anyone promising you "results in 30 days" is either only showing you their best cases or isn't being serious.

Do we have to commit to a 12-month contract?

No. Minimum term of 90 days, after which the contract can be terminated on a quarterly basis. We want you to stay because it works, not because a contract is keeping you here.

We already have an agency. How does switching work?

Audit first. If our audit shows that your current agency is doing good work, we'll tell you. If switching makes sense, we handle the handover: we migrate assets and accounts and make sure the strategy continues without interruption.

What if I only need one discipline (e.g. SEO)?

That's fine, every discipline can be booked individually. In our experience, the combination delivers more, because we feed SEO data into ad management and vice versa. Businesses that want to be found locally often start with local SEO and an optimised Google Business Profile as the first lever.

Do you only work with SMEs or with start-ups too?

Both, but the typical client has an annual turnover of around €2 million or more. We are often not the right fit financially for very early-stage start-ups – in such cases, we prefer to recommend a freelancer network or building up an in-house team.

Who on the team actually works on my project?

You will have a dedicated account lead from the senior team, plus two to four specialists depending on the scope. No ‘senior sells, junior does the work’ mentality. You’ll get to know your specific team at the kick-off meeting.

What if our audit shows that we're not ready yet?

We'll tell you honestly. Plus, we'll give you a roadmap of what you can do yourself before an agency makes sense. Perhaps we'll see each other again in 12 months.

next step

30-minute audit call.
Free and without obligation.

We’ll take a look at your current situation together and let you know whether we’re the right partner for you. If not, you’ll still have an audit PDF to help you move forward.

Joshua is available today.Free audit call? Slots available from tomorrow.