Author: Angelo Saraceno Most people search “what is a PaaS” wanting a simple answer. The simple answer: it’s the contract Heroku invented in 2007, modernized for 2026. A Platform-as-a-Service abstracts the host operating system, the runtime, and the boring parts of shipping software (build pipelines, secrets, TLS, the database you forgot to back up) so that the unit of work is your code, not your infrastructure. You push, the platform runs. That contract is the entire idea. Everything else (mult