Although crowdsourcing has been used in libraries and archives all over the world for more than a decade, it is not very popular in Croatia. Why is that the case? Is it because there's no interest of the public to participate in such projects, because the experts are not motivated to plan and carry out projects or don't have confidence in their beneficiaries to help, or are there not enough resources to implement such projects from scratch? In this thesis, answers to this question are acquired from users, but also from employees of libraries and archives in the city of Zagreb. Although unfamiliar with the term crowdsourcing and its meaning, users would mostly participate in projects if it would be implemented by the institution they are users of and if they find the time for it. They also generally opted for games with a purpose and projects with correction and/or transcription tasks. Results of this research show there is a certain interest amongst organizers as well as volunteers of crowdsourcing projects. For a project to be successful it needs to be well planned and organized, with subjects and activities that will attract potential volunteers. While planning the project one should keep in mind the available target audience.