Bob Wise, Heroku general manager and Salesforce EVP:

Our product, engineering, and security teams are spending an extraordinary amount of effort to manage fraud and abuse of the Heroku free product plans. In order to focus our resources on delivering mission-critical capabilities for customers, we will be phasing out our free plan for Heroku Dynos, free plan for Heroku Postgres, and free plan for Heroku Data for Redis®, as well as deleting inactive accounts.

Starting October 26, 2022, we will begin deleting inactive accounts and associated storage for accounts that have been inactive for over a year. Starting November 28, 2022, we plan to stop offering free product plans and plan to start shutting down free dynos and data services. We will be sending out a series of email communications to affected users.