Who can sell data on Quandl?

Anyone.  Data vendors currently on Quandl include:

  • Established data industry veterans with decades of experience creating and selling professional-grade data products.
  • Individual entrepreneurs leveraging their domain expertise to create new databases for sale.
  • Organizations with valuable data that they would like to monetize.

One characteristic that connects all of them is expert knowledge of the domain the database covers.  You have to understand the data and its use cases very well to be successful.