Quandl
Quandl is the premier source for open, commercial, and alternative data, serving investment professionals
Overview Quandl ?
Quandl offers essential core financial and economic data alongside a suite of unique, alpha-generating alternative data. With an unrivaled delivery system -- whether through API or popular analytic tools, such as R, Python and Excel -- Quandl has cemented a reputation for understanding and providing what professional quantitative analysts need and want
