National Sample S.R.O., Praha

National Sample (formerly known as European National Panels) was founded in 2012 through the merger of online panels from three leading market research agencies: Nielsen Admosphere, NMS Market Research, and STEM/MARK, based in the Czech Republic and Slovakia. In 2025, the company rebranded as National Sample to reflect its expansion into the Asian market, beginning with Thailand.
National Sample provides proprietary online panel services across Europe and Asia, currently serving markets in the Czech Republic, Slovakia, Poland, Hungary, Bulgaria, Romania, Ukraine, and Thailand. The company uses in-house developed software to ensure high-quality, reliable data collection without the use of bots or click farms. Every panelist undergoes strict verification, including email, phone (SMS), and optional AI facial verification (Real eyes software) to ensure authenticity.
With approximately 200, 000 active panelists, National Sample handles around 3 million questionnaires annually. The company boasts an impressively low discard rate of 3-5% and a high response rate of 35-60%, depending on the country. Each panelist is profiled with over 2, 000 data points, providing deep insights for market research needs.