Who We Are?
[ A Digital Agency
Focused on Real Business Growth ]
Focused on Real Business Growth ]
We combine strategy, branding, web design, CRO, and marketing to help businesses grow with clarity and measurable results.
After delivering 1,300+ projects, we know growth is not about trends or guesswork, it’s about understanding the market, building the right systems, and executing with consistency.
From conversion-focused websites to lead generation and growth strategy, we create digital solutions designed to support long-term business performance — not just look good online!
Concept21 in numbers
+1300
Successfully launched projects
+155k
leads generated
15
years in business
More results
For a SaaS startup, we reached 75,000 signups
without spending a single dollar on advertising!
The story behind Concept21
At Concept21, 21 represents the winning number — just like in blackjack. It reflects how we work with clients: as one team, focused on smart decisions, strong execution, and shared success.
The number 21 also stands for the 21st century — modern thinking, digital-first solutions, and the ambition to build concepts that move businesses forward.
In numerology, 21 is connected with creativity, independence, and growth. For us, it represents positive change, bold ideas, and the ability to open new opportunities.
Meet our team
Karol Andruszkow
Co-founder & CEO
Dmytro
UI/UX Designer
Wiktor
Business Analyst
Wojciech Andruszkow
Co-founder & CTO
Karolina
Content Specialist
Gabriela
SEO Specialist
Yakiv
Web Developer
Dmytro
Web Developer
Michalina
Project Manager
The right partnership
changes the game
GROWTHSTARTS HERE!
Let’s Connect
Clients’ Reviews
Joe Stocker
Patriot Consulting
I'm very happy with the website that CONCEPT developed for my company. We are constantly receiving compliments from our clients and partners. The CRM is easy to use and a major differentiator on why we selected Concept.
Holger Vogt
Amena Africa
We contracted CONCEPT to develop a new website for us. The results were outstanding and we are very happy with the new design, functions and structure of the website. The CONCEPT team was super helpful in guiding us on our journey to our new website and are still supporting us after. I can highly recommend their team and services to anyone else in the industry.
Patrick Misiewicz
Polrydian group
I'm a real estate professional, moving my business to the digital/metaverse, which is not such an easy thing to do for busy professionals. That's where CONCEPT came to play, making my www.viewmiamiproperties.com fresh and crispy for my real estate digital campaigns. No matter what business you are in, their personalized and agile approach will make your digital business card look awesome.
Andrea Shaw
The Leasing Academy
The team at Concept21 made great recommendations for my website and helped clarify my messaging for services. I'm very happy with my completed website and appreciate the continued help and guidance they provide even after it has been completed. A great value for the cost!
Wojciech Nowotnik
Enerace
Great staff! Very good reaction and value for money. The entire process was smooth. I can recommend CONCEPT as a reliable partner.
Rafał Zimoch
WhooWhoo
CONCEPT has helped us to start a new webpage/ landing page. Thanks to them we have more than 100% more new B2B leads. Great job CONCEPT!!!!
Paul Mekkering
Nanoflam
I would definitely recommend CONCEPT to anyone who is looking for a very good quality-price web designer. Quick responses, clear and open meetings, reliable, and when the website is running it is easy to make changes yourself. THANKS!
Raquel Barrera Moreno
Diversitas Institute
I totally recommend CONCEPT if you are looking for a reliable and excellent quality-price web designer. A dynamic and professional team that has helped me in the design of my website. Their designs are very modern and the quality and usability of the tools to update the contents are amazing.
Bert Goren
Roxycomms
I had an amazing experience working with CONCEPT on making my new website. Darek was very responsive and had great tips to make things better. I am very happy with the result as well as the professional approach from beginning to end.
Xhulio Bedulla
Xhuli Bre Lalke Shop
Concept21 successfully created and launched a website, which positively impacted the business growth. The team conducted regular meetings to understand the needs and requirements. Their development prowess was critical to the project's success. After releasing the website, my business started to grow, a lot of customers were writing and asking for our services through the website. I can say that helped me a lot.
Dawid Mitera
BudEM sp. z o. o.
We praised the site for its improved look and performance, which resulted in a 50% increase in our site traffic. Concept21 exhibited a keen understanding of the goals, allowing them to deliver professional-looking designs that matched our vision.
Alfonso García
CHULOGO
We were pleased with Concept21 for providing impeccable design skills. The team executed a smooth workflow through, timeliness, effective communication, and an agile methodology. They strove to deliver optimal solutions that ensured the project's success.
Montse Alcalá Bayona
Lovely´s
Concept21 implemented the designs easily, which improved the website's appearance and increased traffic by 60%. The team showed an exceptional understanding of our needs and communicated easily. Overall, they positively surprised us with their top-notch and efficient services.
Our reviews on:
4.9
4.7
5.0
5.0
4.7
Our clients
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