Heroku is a cloud application platform for Ruby, Rails, Node.js, Java, Python, Scala and Clojure web apps. Everything you need to build, run, and scale: Dynos: Run virtually any language at any scale. Database: Enterprise-grade Postgres as a service. Elements: Marketplace of tools, components and services for your app. Heroku Connect: Seamlessly integrate and sync with Salesforce. Heroku provides services and tools to build, run and scale web apps.