Percona Backup for MongoDB vs Stellar: 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, Stellar is detailed as "Fast database snapshot and restore tool for development". Stellar allows you to quickly restore database when you are e.g. writing database migrations, switching branches or messing with SQL. PostgreSQL and MySQL are supported.

Percona Backup for MongoDB and Stellar can be categorized as "Database" tools.

Stellar is an open source tool with 3.68K GitHub stars and 114 GitHub forks. Here's a link to Stellar's open source repository on GitHub.