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Our clients and references

We share a unique story with each of our clients.
We are only satisfied when our clients are happy.

Client satisfaction is what drives us. That is why we regularly ask our clients whether they would recommend us to others. This results in a Net Promoter Score of currently 73 (as of October 2023).

What makes working with The Boutique Agency so special?
Manager Campaign and Performance Marketing

The Boutique Agency is a valuable advisor and sparring partner for us in establishing a holistic performance marketing approach.

Especially in the area of LinkedIn, which is of particular business relevance to us. From strategic campaign conception, distribution, optimisation and performance measurement to the establishment of professional project processes, together we have been able to raise our marketing performance to the next level.

We particularly appreciate the proactive impulses for new possibilities (strategies, tests, ad formats, etc.), which are always thought through in a challenging business environment and can be scaled within the group. 

Daria Kossogova
Head of Marketing
REAL ESTATE / Software

The SEO team at The Boutique Agency is our first call when it comes to SEO audits, keyword strategy, ranking optimization or a complete website relaunch.

Not only does the team have expert knowledge, but they can also bring complex technical SEO topics across in an understandable way. We work together seamlessly , progress is always recorded in meaningful reports, challenges are addressed in an honest way and are tackled collaboratively . Honesty and transparency - that's very valuable when working with an agency environment.

Darius Greulich
Director Customer Experience

In The Boutique Agency we have found a reliable partner who supports us across channels and improves our performance in the long term.

The Boutique Agency has been supporting us for some time now. Whether for  social media, SEA or SEO, we always perceive The Boutique Agency as a competent and reliable partner that offers innovative solutions and supports us in their implementation. We particularly appreciate the expertise, the commitment and friendliness of our contact persons.

Digital Marketing Manager

Working with The Boutique Agency has allowed us to significantly increase our SEA performance and visibility.

We have already had various contact partners and the cooperation with all of them has been very good. They proactively point out new ideas and recommendations for action that move us forward. We were impressed by their reliability. 

Isabelle Bunck
Head of Acquisition and Retention
Finance & Insurance

With The Boutique Agency we have found a partner who was able to take our PPC performance to the next level through intensive and professional cooperation.

They were able to convince us from the start with their structured approach and their expert knowledge. In addition to the technical know-how, we also particularly value our friendly and reliable contact partners.

Albrecht Fischer
Head of Marketing

Ever since The Boutique Agency started taking care of our PPC and shopping campaigns, the efficiency of these channels has increased significantly.

The very good knowledge of the various traffic sources in the seven countries in which we work together makes it easy to internationalize our campaigns. Not to be overlooked is the high level of expertise in tracking and technical topics - and, last but not least, the good collaboration on a personal level. 

Daniel Kammerer
Performance Marketing

The Boutique Agency was the first choice for the global PPC performance strategy of uniscon GmbH.

With Daniela and Sebastian from The Boutique Agency, we have the right sparring partners to further optimize and expand our PPC strategy. The entire team is always up to date in PPC marketing matters. We benefit from their holistic optimization approach and are constantly supported by their up to date expertise. 

Nicole Lontzek
Head of Digital Marketing

With The Boutique Agency, we have chosen a competent and experienced specialist for Search Ads 360.

Oliver Zenglein and his dedicated team were of great support to us in our strategic realignment in SEA. I can highly recommend working with them.

Kalina knapp
Head of Marketing and Communications
Educational institution

We particularly appreciate the technical expertise and competent advice.

For us, The Boutique Agency is not just an agency, but a valuable partner who looks after all relevant SEO and PPC topics to our full satisfaction and also provides important input for further development.

Case Study
Case Study: roastmarket

Improvement of the user experience and a positive development of all Core Web Vitals within three months.

Roast Market GmbH is Europe's largest online retailer for coffee, coffee machines and accessories.

The goal of our SEO strategy was to create an improved mobile experience as well as web performance.

Through the optimisation we achieved, among other things, a measurable increase in the Net Promoter Score of roastmarket.

Our clients
Client testimonials
Florian Otto

NIO Logo

In The Boutique Agency NIO has found a perfect partner for SEO. The NIO philosophy "Experience beyond expectations" is a defining feature of our collaboration with SEM Boutique. Very good understanding of the business requirements, and excellent support during the project.

Laura Zwick

Workwise Logo

We spoke to several agencies before choosing and felt directly in good hands with The Boutique Agency. The team with Verena understood our challenge and gave a realistic and honest assessment. Thanks to the agency's flexible way of working, we were able to test the service in advance before deciding on a long-term collaboration.

Christophe Aumaître

Jochen Schweizer

The Boutique Agency supported us with a comprehensive SEA audit and, building on this, with the expansion of our Google AdWords campaigns, which enabled us to become much more efficient and structured in a very short timeframe.

Nicolas Stadtelmeyer

Stylight Logo

Oliver and The Boutique Agency showed us valuable growth drivers and new input for our SEA accounts through a detailed SEA audit. A very pleasant and valuable collaboration.


Dr. Christoph Röck

121WATT Logo

We really appreciate Oliver Zenglein and Sebastian Stryj. They have been working with us for a very long time and are among our top speakers at 121WATT. Our participants appreciate their in-depth knowledge and their factual and very understandable way of teaching search engine marketing. As they both have worked for years on the client side, they manage to convey the seminar topics in a very lively way, and support the theory with real life examples from their experience. Thank you very much for working with us!

Julia Mitmesser

SDK Süddeutsche Krankenversicherung Logo

With Helen from The Boutique Agency, we were able to successfully introduce search and display ads for SDK - Süddeutsche Krankenversicherung a.G. for the first time and continue to develop them. We feel very well taken care of with the advertising of our new supplementary insurances and have found a trustworthy partner in SEM Boutique who understands us very well and brings great commitment. Working together is a lot of fun and we look forward to further cooperating on new projects.

Christian Kriegeskorte

SIXT mydriver Logo

With the help of The Boutique Agency SEO consulting, our organic rankings have continued to improve. Whether link building, content planning or technical support from an SEO point of view during the website relaunch - SEM Boutique was always a competent partner and the results were convincing.

Paul Leibssle

Rosetta Stone Logo

The Boutique Agency has become an extended arm for us in performance marketing. I appreciate the high level of accuracy and integrity which Oliver and his team provides. We also get good strategic input. I have had completely different experiences with larger agencies. I am looking forward to strong growth rates in the new year and expansion into further markets and channels.

Fabian Reuter


Thanks  to the professional consulting from SEM Boutique we were able to improve our SEO performance and launch new projects. 

Jan Meissner

The Boutique Agency team took us on as a client in a complex situation that had grown over the years. The insurance market in particular puts high demands, and SEA manager Lisa Schöller was able to resolve this situation in a professional manner thanks to relevant previous knowledge. The cooperation with the agency's management is smooth and highly client-oriented. We are looking forward to the success story ahead of us and to further joint cooperation

Sven Kerper

For us, communication and engagement come first and that's what The Boutique Agency offers.

Oliver and his entire team convinced us right from the start with their friendliness, dynamism and expertise. We are convinced that with The Boutique Agency we have a partner for the future and look forward to many years of great cooperation. Through Marek and his team, we can continue to grow and learn a lot. In addition, a great personal relationship has already developed in a short time, through which one gains great

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