The consumer insights (CI) ecosystem used to be simple — comprised mostly of agencies, data brokers, and database providers. But today's marketer relies on a multitude of data providers, partners, and platforms to acquire and activate the right data for her business. This report provides an overview of the services providers that exist in this ecosystem; it attempts to catalog them in a way that is useful to marketers and to advertisers seeking to optimize their use of first-, second-, third-, and zero-party data.