At a glance
Speed Optimizer – The All-In-One Performance-Boosting Plugin
Boost your website performance and page speed, and increase conversions with powerful caching, frontend, media, and environment optimizations.
Redis Object Cache
A persistent object cache backend powered by Redis®¹. Supports Predis, PhpRedis, Relay, replication, sentinels, clustering and WP-CLI.
Full Comparison
Technical Specs
| Metric | Speed Optimizer | Redis Object Cache |
|---|---|---|
| Requires WP | 4.7+ | 4.6+ |
| Requires PHP | 7.0+ | 7.2+ |
| Tested up to WP | 7.0 | 7.0 |
| Plugin age | 12 yrs | 12 yrs |
Quick Verdict
Redis Object Cache is the better plugin for most WordPress sites. It holds an 83% five-star rating from 175 reviews, compared to Speed Optimizer's 72% five-star rating. Speed Optimizer has 2.5x more installs than Redis Object Cache, but Redis Object Cache delivers a focused, high-performance solution for database query caching that earns stronger user satisfaction.
Feature Comparison: Speed Optimizer vs Redis Object Cache
| Feature | Speed Optimizer | Redis Object Cache |
|---|---|---|
| Primary function | All-in-one performance booster with caching, frontend, media, and environment optimizations | Persistent object cache backend powered by Redis |
| Caching type | Page caching, browser caching, and object caching | Object cache only (database query results) |
| Redis support | Nginx caching built-in, no native Redis object cache | Predis, PhpRedis, Relay, replication, sentinels, and clustering |
| Frontend optimization | Minify CSS and JavaScript, combine files, defer scripts | None (object cache only) |
| Media optimization | Image compression, lazy loading, WebP conversion | None (object cache only) |
| Environment optimization | Heartbeat control, database optimization, GZIP compression | None (object cache only) |
| WP-CLI support | Not listed | Full WP-CLI commands for cache management |
| Tagged performance features | Caching, nginx, performance, siteground, speed | Caching, object-cache, performance, redis, relay |
Speed Optimizer covers a broad range of tasks from minifying CSS and JavaScript to optimizing images for web performance. Redis Object Cache does one thing and does it well: it speeds up database queries by storing them in memory.
Who Should Use Speed Optimizer
- Teams managing shared hosting environments where a single plugin handles caching, minification, and media compression. Speed Optimizer is trusted by 1.0M+ active installs.
- Users who want to enable nginx caching WordPress without editing server config files. Speed Optimizer includes nginx caching as a built-in toggle.
- Site owners who need a caching plugin for WooCommerce stores but also want frontend performance tools like lazy loading and script deferring in one package.
Who Should Use Redis Object Cache
- Developers running high-traffic sites where database query caching is the primary bottleneck. Redis Object Cache supports Predis, PhpRedis, and Relay backends, giving you flexibility in how you connect.
- Teams who need to set up redis object cache in WordPress with replication or clustering for load-balanced environments. Redis Object Cache handles sentinels and clustering natively.
- Site owners who value a focused, well-supported tool. Redis Object Cache resolves 92% of support threads within two months, and 83% of reviewers give it five stars.
Community & Support
Redis Object Cache shows strong community support. Over a two-month period, the plugin received 13 support threads with 12 resolved, giving a 92% resolution rate. The ratings breakdown reinforces this reliability: 83% of reviewers give it five stars, while only 11% leave one-star reviews. Speed Optimizer's support sample is too small to draw conclusions, but its rating distribution shows 72% five-star and 14% one-star ratings from 637 total reviews.
Verdict: Speed Optimizer or Redis Object Cache for WordPress sites?
Pick Speed Optimizer if you need a single plugin that handles page caching, minify CSS and JavaScript WordPress tasks, and image optimization. It's the best caching plugin for WordPress users on SiteGround or similar hosts who want turnkey performance gains. Its 2.5x larger install base reflects that convenience.
Pick Redis Object Cache if your site's slowest part is database queries. This plugin delivers a 92% support resolution rate and an 83% five-star rating from 175 reviews. For anyone asking how to speed up WordPress site performance through object caching, Redis Object Cache is the clear winner. It earns the recommendation for sites that need reliable, high-speed database caching without the extra bloat of frontend tools.
This comparison is AI-generated from live WordPress.org data. Install counts, ratings, versions and support statistics sync weekly, so the numbers on this page stay current. Content passes automated quality checks before publishing, and pages below our quality threshold are held for human review.
Read our full methodologyFrequently Asked Questions
Q How many people use Speed Optimizer compared to Redis Object Cache?
Speed Optimizer has 1.0M+ active installs while Redis Object Cache has 400K+, meaning Speed Optimizer is used on more sites.
Q Which has better user ratings — Speed Optimizer or Redis Object Cache?
Redis Object Cache averages 4.5/5 from 175 reviews, while Speed Optimizer averages 4.2/5 from 637 reviews — Redis Object Cache has the higher average rating.
Q Which is more actively maintained — Speed Optimizer or Redis Object Cache?
Speed Optimizer was last updated on May 15, 2026 and Redis Object Cache on May 4, 2026, so Speed Optimizer received the more recent update.
Q Are Speed Optimizer and Redis Object Cache both free?
Yes — both Speed Optimizer and Redis Object Cache are free to install from the official WordPress.org plugin directory. Some features may require a paid upgrade offered by the plugin author.
Q Is Speed Optimizer or Redis Object Cache better for WordPress sites?
For most WordPress sites, Speed Optimizer is the better all-in-one choice because it handles caching, CSS/JS minification, and Nginx optimization out of the box. Redis Object Cache is better if your site specifically needs to offload database queries to an in-memory object cache, but it does not offer the same breadth of front-end performance features.
Q Which is easier to set up for a WordPress beginner — Speed Optimizer or Redis Object Cache?
Speed Optimizer is easier for a beginner because it works immediately after activation with default settings that handle caching and file optimization. Redis Object Cache requires you to have a Redis server already running on your host and typically needs a few configuration steps, which can be confusing if you are not familiar with server-level caching.
Q What is the biggest feature difference between Speed Optimizer and Redis Object Cache?
The biggest difference is that Speed Optimizer is a full-featured performance plugin that includes page caching, Nginx integration, and file minification, while Redis Object Cache focuses solely on replacing WordPress's database object cache with Redis. Speed Optimizer improves front-end load times directly, whereas Redis Object Cache reduces backend database calls for logged-in users and dynamic content.
Q Can you switch from Speed Optimizer to Redis Object Cache (or the other way) without losing data?
Yes, you can switch between them without losing your WordPress content or settings, because they operate on different layers of caching. Speed Optimizer caches HTML pages and static files, while Redis Object Cache caches database query results, so deactivating one does not delete your posts, pages, or plugin configurations.
Q Which type of site should choose Speed Optimizer, and which should choose Redis Object Cache?
Choose Speed Optimizer if you run a typical blog, business site, or WooCommerce store and want a single plugin to handle page caching, Nginx optimization, and file minification. Choose Redis Object Cache if your site uses a lot of database queries, such as a membership site or a site with heavy user interaction, and you already have a Redis server available on your hosting plan.
More Performance & Caching Comparisons
OMGF vs Jetpack Boost
Breeze Cache vs OMGF
Imagify vs Converter for Media
WP-Optimize vs CLP Varnish Cache
WP Fastest Cache vs SpeedyCache
Smush vs Imagify
WP-Optimize vs Breeze Cache
Imagify vs ShortPixel Image Optimizer