Comet Cache vs Speed Optimizer
Compare WordPress plugins and tools side by side. Pick products with “Compare” in the software directory.
| Feature | Comet Cache v170220 · checked 23 Oct 2026 Free + paid · ★ 4.4/5 Visit Details | Speed Optimizer v7.8.5 · checked 23 Oct 2026 Free · ★ 4.2/5 Visit Details |
|---|---|---|
| At a glance | ||
| Active installs | 20,000+ | 1M+ |
| Last updated | July 2, 2025 | October 20, 2026 |
| Editions | Comet Cache · Comet Cache Pro ($) | Speed Optimizer |
| Pros | Free full-page cache for anonymous visitors; Cron-driven cleanup of cache files; Simple settings for browser caching of dynamic pages | Page caching, minification and lazy loading in one place; Browser cache headers and database cleanup; Free, from the WordPress.org directory |
| Cons | HTML and asset minification need Pro; CDN filters and Apache optimisations need Pro; Logged-in users are not cached in the free version | Dynamic caching and Memcached are SiteGround-only; CDN premium tier depends on the hosting plan; Calls Google PageSpeed and Google Fonts services |
| Mentioned in our posts | 1 | — |
| Features (Speed Optimization plugins checklist) | ||
| Page cache | Yes | Yes |
| Browser cache | Yes | Yes |
| Minify CSS/JS | Paid | Yes |
| CDN | Paid | Paid |
| Object cache | No | Yes |
| Database cleanup | No | Yes |
| Free version | Yes | Yes |
| More features | ||
| Other features | Cron job that cleans up cache files, Excludes WooCommerce pages and clears on stock change, Cache logged-in users (Pro) ($), HTML Compressor for CSS, JS and HTML (Pro) ($), Static CDN filters and domain sharding (Pro) ($), Automatic updater for Pro ($) | Lazy loading of images, iframes and videos, Image optimisation, WebP image conversion, Force HTTPS, Heartbeat control, PageSpeed analysis |
| Integrations | ||
| Analytics | — | Google PageSpeed Insights |
| E-commerce | WooCommerce | — |
| Plugins | bbPress | — |
| Other | — | Google Fonts |
| Requires WordPress | 4.2 | 5.5.1 |
| Requires PHP | — | 7.0 |
| Tested up to | 6.9-alpha-60398 | 7.1 |
| Phones home | No | No |
| External services | — | www.googleapis.com, fonts.googleapis.com, sgwpdemo.com, api.wordpress.org |