Redis Object Cache
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About
A persistent object cache backend powered by Redis®¹. Supports Predis, PhpRedis, Relay, replication, sentinels, clustering and WP-CLI.
What It Does
Redis Object Cache turns Redis into a persistent backend for WordPress's built-in object cache, replacing transient storage in the database with in-memory key-value lookups. It supports Predis, PhpRedis, and Relay PHP libraries, and works with Redis Sentinel, replication, and clustering for high-availability deployments. A WP-CLI command is included for cache flushing, health checks, and diagnostics.
Who It's For
This plugin is aimed at site owners and agencies running on hosts or servers where Redis is available, especially those handling high traffic, large WooCommerce catalogs, multisite networks, or membership platforms where database query volume is the main bottleneck. It is best suited to users comfortable editing wp-config.php and verifying Redis connectivity at the server level, since the plugin assumes Redis is already provisioned.
Who Should Skip It
If you are on shared hosting without Redis support, or you do not know how to install and configure a Redis server, this plugin will add friction without benefit, and full-page caching plugins like LiteSpeed or WP Super Cache will deliver much larger speedups. Small blogs with under a few thousand pageviews per day will rarely notice a difference.
The Bottom Line
Redis Object Cache is the de facto standard for adding Redis-backed object caching to WordPress, and its 92.22/100 quality score, near-perfect maintenance record, and strong support resolution rate justify that position. It is not a beginner or shared-hosting tool, and it does not replace full-page caching, so pair it with a page cache solution for maximum effect. If your host offers Redis and your database is your bottleneck, install it; otherwise look at the alternatives above.
Related Plugins
Pick LiteSpeed Cache if your host runs the LiteSpeed web server and you want full-page caching, image optimization, and a GUI rather than editing wp-config.php.
Pick Jetpack when you want object caching bundled with CDN, security, backups, and growth tools in one package instead of just a Redis backend.
Pick this when your priority is caching full HTML at the Cloudflare edge rather than accelerating PHP/database work at the origin.
Pick WP-Optimize for an all-in-one cache, image compression, and database cleanup plugin aimed at non-technical site owners.
Pick WP Fastest Cache for a simple, low-config page cache on shared hosting where Redis is not available.