Make confident decisions with professional Power BI reports

We design structured, reliable Power BI reporting solutions that give you clarity, control, and confidence in your decisions.

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Our Services

What We Offer

We help businesses turn complex data into clear, actionable insights that support smarter data-driven decision-making. We design and deliver modern Power BI reports and dashboards, streamline reporting workflows, and ensure stakeholders have fast access to accurate, up-to-date insights.

Our focus is on data quality, advanced analytics, and intuitive data visualization with a strong emphasis on user experience. The result is powerful yet easy-to-use reporting solutions tailored to your business needs and accessible to your team.

In addition to report development, we provide consulting, training, and long-term collaboration. We help organizations improve their reporting practices, optimize semantic models, and fully unlock the value of their data to drive growth and operational efficiency.

We operate across

Slovakia, the Czech Republic, and the DACH region (Germany, Austria, Switzerland)

  • Sales report
  • Sales one page regions
  • Pareto analysis
  • IBCS
  • Matrix finance
  • KPI Cards
  • SVG + Image in Card
  • Segmentation in scatter plot
  • Macroeconomic analysis
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Constantia
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BV
MV
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Andrej Gula
Founder AG DATA

Our company is built on strong expertise in finance, data analytics, and business intelligence. With nearly six years of experience in the financial sector, we specialize in transforming financial data into structured, reliable reporting that enables informed and confident decision-making.

In addition to our core focus on finance, we have successfully delivered reporting and analytics solutions in HR, marketing, and healthcare environments. Our methodological approach and technical expertise allow us to work effectively with virtually any type of structured business data across industries.

“Without data, you’re just another person with an opinion.”
— W. Edwards Deming

Our Services​

Find the right service for you

Reporting

Development of customised and interactive Power BI reports

Data analysis

Advanced data analysis with DAX

Migration

Migration of Excel reports to Power BI

Audit

Independent review and optimisation of Power BI reports

Administration

Structured and reliable Power BI environment management

Consulting

Flexible consulting and hands-on support

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Reviews

Martina Bartošová
Martina BartošováReporting specialist (finance)
Andrej has extensive experience with Power BI and DAX (among other skills), which was evident during every consultation. He was always able to react quickly to questions, and even when he didn't have an immediate answer, he proactively researched it until we found a functional solution. I truly appreciate his mindset: he views complex problems as challenges rather than obstacles and is always willing to help find a way to both understand and solve them.
Martin Katerinka
Martin KaterinkaData analyst (SLSP)
I’ve had the pleasure of collaborating with Andrej on several key projects within the financial sector. Andrej is a true specialist in Power BI. He possesses the technical depth required for advanced DAX modeling and the strategic mindset needed to build dashboards that drive decision-making. His contribution to our data initiatives was significant, and I strongly recommend his services to anyone seeking excellence in Business Intelligence.
Gabriela Barátová
Gabriela BarátováSales analyst (logistics)
I contacted Andrej when I urgently needed to gain practical skills in Power BI, as it became a requirement in my job. Andrej taught me how to work with Power Query, modify and transform data, create various visualizations, and use DAX functions in a systematic and easy-to-understand way. Together, we created 4–5 reports where I could practice everything hands-on and understand how it all connects. Throughout our collaboration, he was extremely patient and helpful. Even as a complete beginner with no programming experience, I was able to understand everything and gradually learn to work independently thanks to his explanations. He always found the time when I needed a consultation and was able to provide effective advice and guidance. I am very grateful for his help and professional approach.
Juraj Pirič
Juraj PiričFinancial reporting professional (energy)
Whenever I struggled with Power BI and felt stuck, Andrej was always my go‑to expert. He has a unique ability to break down complex problems into clear, practical steps that actually make sense. His teaching style is approachable, structured, and focused on real‑world use cases, not just theory. Andrej’s guidance significantly improved my understanding of Power BI and helped me work more efficiently and confidently. I highly recommend him to anyone looking for a skilled, supportive, and inspiring Power BI instructor