In my use of Percona Server, I've found that the replication and High Availability features are the most valuable.
Percona Server OverviewUNIXBusinessApplicationPrice:
Download the Open Source Databases Buyer's Guide including reviews and more. Updated: September 2022
What is Percona Server?Percona Server for MySQL is a free, fully compatible, enhanced, open source drop-in replacement for MySQL that provides good performance, scalability and instrumentation. With over 3,000,000 downloads, Percona Server for MySQL's self-tuning algorithms and support for extremely high-performance hardware delivers excellent performance and reliability.
Percona Server CustomersPricefalls Marketplace, Micpoint, Rent the Runway, Transmart, Wattpad, Singular Group, Invoca, 3E