Heroku is the PaaS pioneer, founded in 2007 by James Lindenbaum, Adam Wiggins, and Orion Henry in San Francisco. Creator of the 12-Factor App methodology. Acquired by Salesforce in 2010 for $212M.
12-Factor App organizes company profiles and brand information around related products, services, and industry information so readers can research product differences, service quality, use cases, and industry changes.