How much does Quandl data cost?
Quandl's high-quality premium databases are available only to paying subscribers. Pricing varies from database to database. Click the "View Pricing" button on any premium database page to see the available pricing plans.
All free databases on Quandl are indeed free. You can use them in any way you want with no restrictions.
All features on Quandl are free to use, including the website, API, libraries, and Excel add-in.