orchestrator vs PostgREST: What are the differences?
orchestrator: MySQL replication topology management and HA (by GitHub). orchestrator actively crawls through your topologies and maps them. It reads basic MySQL info such as replication status and configuration. It provides with slick visualization of your topologies, including replication problems, even in the face of failures; PostgREST: 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.
orchestrator and PostgREST can be primarily classified as "Database" tools.
orchestrator and PostgREST are both open source tools. PostgREST with 12.5K GitHub stars and 585 forks on GitHub appears to be more popular than orchestrator with 2.97K GitHub stars and 451 GitHub forks.