Redis Object Cache vs Speed Optimizer
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| Feature | Redis Object Cache v3.0.0 · checked 23 Oct 2026 Free + paid · ★ 4.5/5 Visit Details | Speed Optimizer v7.8.5 · checked 23 Oct 2026 Free · ★ 4.2/5 Visit Details |
|---|---|---|
| At a glance | ||
| Active installs | 500,000+ | 1M+ |
| Last updated | September 18, 2026 | October 20, 2026 |
| Editions | Redis Object Cache · Object Cache Pro ($) | Speed Optimizer |
| Pros | Supports several Redis clients, including Relay and PhpRedis; Sentinel and replication configuration in the free version; Status, diagnostics, WP-CLI commands and a flush action in admin | Page caching, minification and lazy loading in one place; Browser cache headers and database cleanup; Free, from the WordPress.org directory |
| Cons | Object cache only: no page caching, minification or CDN; Needs a reachable Redis server and PHP client extension or library; Shows upgrade prompts for the paid Object Cache Pro | Dynamic caching and Memcached are SiteGround-only; CDN premium tier depends on the hosting plan; Calls Google PageSpeed and Google Fonts services |
| Features (Speed Optimization plugins checklist) | ||
| Page cache | No | Yes |
| Browser cache | No | Yes |
| Minify CSS/JS | No | Yes |
| CDN | No | Paid |
| Object cache | Yes | Yes |
| Database cleanup | No | Yes |
| Free version | Yes | Yes |
| More features | ||
| Other features | Predis, PhpRedis, Relay and Credis clients, Sentinel and replication settings, WP-CLI redis commands, Dashboard status widget, Admin bar status and flush, Query Monitor collector and output, Hit and miss metrics pruned hourly, Automatic object-cache.php drop-in update, Upgrade prompts for Object Cache Pro | Lazy loading of images, iframes and videos, Image optimisation, WebP image conversion, Force HTTPS, Heartbeat control, PageSpeed analysis |
| Integrations | ||
| Analytics | — | Google PageSpeed Insights |
| Storage | Redis server | — |
| Plugins | Query Monitor | — |
| Other | WP-CLI | Google Fonts |
| Requires WordPress | 4.6 | 5.5.1 |
| Requires PHP | 7.2 | 7.0 |
| Tested up to | 7.1 | 7.1 |
| Phones home | No | No |
| External services | — | www.googleapis.com, fonts.googleapis.com, sgwpdemo.com, api.wordpress.org |