Recent congressional inquiries into Envestnet's Yodlee and Avast's Jumpshot highlight the risks aggregators of alternative data and their hedge fund clients have as they rely on datasets that could disappear overnight. Business Insider spoke to roughly a dozen alternative data providers and consumers to get a sense of how to sell or use a product, respectively, that is not guaranteed to always be there. "It's a problem, and it's a largely unhedgeable risk," said Tammer Kamel, cofounder and CEO of Quandl. Visit Business Insider's homepage for more stories.