This week on From Scratch:

Jeremy StoppelmanYelp provides user-generated reviews of local businesses through its website and mobile app. Its contributors provide their opinions on a variety of businesses, ranging from clothing stores to restaurants. Prior to launching Yelp, Jeremy worked at Paypal. Yelp went public in 2012.

Jeremy speaks with Jessica about how he launched Yelp, from scratch.

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Marc DaCostaEnigma is a company that uses the internet to make public data available and understandable to users. Enigma links across various databases to uncover relevant facts that a user might not notice by looking at a single data set. The universe of data sources to choose among includes SEC filings, public health records, government spending contracts, sales tax receipts , among several others.

Marc speaks with Jessica about how Enigma is making public data more accessible, from scratch.

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