The paper presents the functionality and implementation process of the web-based system of Statistics Estonia called eSTAT. eSTAT is designed for economic entities (enterprises, state and local government agencies, non-profit organisations, sole proprietors) for compiling and transmitting statistical reports within the framework of conducting official statistical surveys. Within Statistics Estonia eSTAT serves as a part of customer relationship management system, where contacts with respondents are held and recorded. eSTAT was launched in February 2006 and in the same year eSTAT was declared the Best Innovation in the public sector of Estonia by the State Chancellery of Estonia. The working language for eSTAT is only Estonian.