In recent years, software has been increasingly offered in a form of Software as a Service (SaaS), where the user needs no installation, but consumes the service on the provider side. This also includes services related to web surveys. As the cost and complexity of these services increased, the price categories for related functionalities emerged as packages, based on a corresponding business model. There are hundreds of web survey tools, each with many packages, so users face a selection problem similar to any other service on the market. In diploma thesis we first give an overview of business models and their relation to digitalisation. We also present the development of web survey tools. In the empirical part we analysed 49 selected tools, which also offer a free package or a free trial version for their packages. No tool offers all functionalities for free. It turns out that three to four packages dominate, but there are considerable differences and inconsistencies between the tools with respect to pricing of certain functionalities. We also encounter few tools with a payment per respondent model. In addition to providing the web survey service, more and more tools are setting their own online panel so that they can also offer the samples of respondents.
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