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GWI’s specialized data sets help you go deep on the audiences that matter most. We offer both syndicated data sets — collected on an ongoing basis and ready to explore straight away — and custom data sets, which you can purchase and shape with our team, built entirely around your needs. This article outlines our main syndicated data sets, available via our Platform API and the GWI Spark API (including MCP). For more detail on how to go bespoke and purchase custom data sets, see this help center article. Our syndicated data sets fall into two types: primary data sets and add-on data sets — depending on whether their samples are independent, or based on recontacting respondents from another data set.

For more detail on how to work with multiple data sets using our APIs, see the relevant articles:

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Primary Data Sets

Primary data sets focus on different audiences and are independent of each other, as they’re based on data from separate surveys, each with its own sample of respondents.

Below is a list of all our syndicated primary data sets, with the namespace codes you’ll need when searching these data sets via our API and links to our dedicated help center articles for methodology details.
GWI Core and GWI USA use a split survey methodology, where around half of the main survey’s respondents also complete an extension survey on additional topics. This allows us to cover a large number of topics without exhausting respondents.

This set up means that questions from the follow up survey have a smaller sample than the main survey and live in a separate namespace (outlined in the table below).

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Add-On Data Sets

Add-on data sets complement our flagship data set, GWI Core, with extra depth on specific topics across select markets. They’re based on recontacting select GWI Core respondents to explore these topics in more detail.

Below is a list of all our syndicated add-on data sets, with the namespace codes you’ll need when searching these data sets via our API and links to our dedicated help center articles for methodology details.