Percona Backup for MongoDB vs PostgREST: What are the differences?
Developers describe Percona Backup for MongoDB as "A fully supported, open source, community backup tool for performing consistent hot backups in MongoDB". It is a distributed, low-impact solution for achieving consistent backups of MongoDB sharded clusters and replica sets. It supports Percona Server for MongoDB and MongoDB Community v3.6 or higher with MongoDB Replication enabled. It is an alternative for users who want a fully supported community backup tool, but do not want to pay for MongoDB Enterprise and Ops Manager. With easy command-line interface, you can perform consistent backup/restore of clusters and non-sharded replica sets, and improve cluster backup consistency. This saves you time and effort if you are implementing MongoDB backups for the ﬁrst time. 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.
Percona Backup for MongoDB and PostgREST belong to "Database Tools" category of the tech stack.
PostgREST is an open source tool with 14.9K GitHub stars and 730 GitHub forks. Here's a link to PostgREST's open source repository on GitHub.