Administrate vs PostgREST: What are the differences?
Developers describe Administrate as "Rails framework for creating flexible admin dashboards, by thoughtbot". Administrate is heavily inspired by projects like Rails Admin and ActiveAdmin, but aims to provide a better user experience for site admins, and to be easier for developers to customize. On the other hand, PostgREST is detailed as "Automatic REST API for Any Postgres Database". PostgREST serves a fully RESTful API from any existing PostgreSQL database. It provides a cleaner, more standards-compliant, faster API than you are likely to write from scratch.
Administrate and PostgREST can be primarily classified as "Database" tools.
Administrate and PostgREST are both open source tools. PostgREST with 12.5K GitHub stars and 585 forks on GitHub appears to be more popular than Administrate with 4.43K GitHub stars and 779 GitHub forks.