====== postgresql-paas ======
== azure ==
  * https://azure.microsoft.com/ja-jp/services/postgresql/
  * 最小で約3000円
== amazon rds ==
  * https://aws.amazon.com/jp/rds/postgresql/
  * 最小約15$

== digitalocean ==
  * https://www.digitalocean.com/products/managed-databases-postgresql/
  * 最小15$
== google cloudsql ==
  * https://cloud.google.com/sql?hl=ja
  * 最小約10$

== ElephantSQL ==
  * https://www.elephantsql.com/
  * 5$
== PostgreSQL Cluster ==
  * https://www.pgsclusters.com/
  * 5$
== scriptcase.host ==
  * https://scriptcase.host/postgresql-host
  * 3.5$
== Compose ==
  * https://www.compose.com/pricing#postgresql
  * $17.50
== Clever Cloud ==
  * https://www.clever-cloud.com/
  * 4.5E