Quandl is described as 'Search engine for numerical data. The platform offers access to millions of open and free financial, economic, and social datasets, that are indexed from hundreds of sources. It provides all users with options to download the datasets in various formats, or to access' and is an website in the online services category. There are more than 10 alternatives to Quandl, not only websites but also apps for a variety of platforms, including SaaS, iPhone, Android and iPad apps. The best Quandl alternative is Koyfin, which is free. Other great sites and apps similar to Quandl are Bloomberg, Alpha Vantage, Twelve Data and Morningstar.