Also called: pgbackrest, PostgreSQL backup tool
In plain English
pgBackRest is a widely used open-source backup and restore tool for PostgreSQL. It manages a repository of physical backups (full, differential, incremental, and block-incremental) plus archived WAL, using PostgreSQL’s own backup API — and restores to any point in time by replaying WAL on top of a chosen backup.
Why it matters
It turns PostgreSQL’s low-level backup primitives into a production-grade workflow with parallelism, compression, encryption, retention, offsite repositories, and point-in-time recovery. It is the de facto standard for serious PostgreSQL backup and disaster recovery.