Heroku Postgres is described as 'A powerful, reliable, and durable open-source SQL-compliant database, PostgreSQL is the datastore of choice for serious applications. Now it is available in seconds with a single click. Never worry about servers. Never worry about config files. Never worry about patches' and is a relational database. There are eight alternatives to Heroku Postgres, not only websites but also apps for a variety of platforms, including Self-Hosted, SaaS, Microsoft Azure and Amazon Web Services apps. The best Heroku Postgres alternative is Neon Postgres, which is both free and Open Source. Other great sites and apps similar to Heroku Postgres are Amazon RDS, Google Cloud SQL, Azure SQL Database and Azure SQL.