If you’re looking to make your WordPress website faster, caching plugins are one of the most effective tools available. But with both premium and free options on the market, which one actually delivers the best results?
At Red Jet, we’ve tested them all – from WP Rocket to popular free alternatives like LiteSpeed Cache, W3 Total Cache, and WP Super Cache. In this post, we’ll break down how they compare in real-world speed tests, and help you decide which is right for your site.
🧪 The Testing Setup
To keep things fair, we ran the same test site across each caching plugin using the following setup:
- WordPress 6.x
- GeneratePress theme
- WooCommerce installed
- Hosted on Red Jet’s optimised stack (NGINX, PHP-FPM, MariaDB)
- No CDN, minification, or extra plugins enabled (unless done by the caching plugin itself)
We measured:
- Time to First Byte (TTFB)
- Fully loaded time
- Google PageSpeed score
- Total HTTP requests
Each site was tested multiple times using GTmetrix and PageSpeed Insights and averaged for accuracy.
⚖️ The Contenders
WP Rocket (Premium)
✔️ Paid plugin (but included with all Red Jet hosting plans)
✔️ Out-of-the-box performance
✔️ Includes CSS/JS optimisation, lazy loading, preload, and database cleanup
LiteSpeed Cache (Free)
✔️ Designed for LiteSpeed servers (but partially works on others)
✔️ Full page caching, image optimisation, and advanced settings
❗ Best when paired with LiteSpeed web server
W3 Total Cache (Free)
✔️ Highly customisable
✔️ Object cache, minify, and CDN support
❗ Complex interface, easy to misconfigure
WP Super Cache (Free)
✔️ Lightweight and simple
✔️ Good for basic blogs
❗ Lacks advanced features like minification or deferral
📊 The Results
| Plugin | TTFB | Load Time | PageSpeed Score | Setup Difficulty |
|---|---|---|---|---|
| WP Rocket | 520ms | 1.4s | 96 (mobile) | Easy |
| LiteSpeed Cache | 610ms | 1.6s | 94 (mobile) | Medium |
| W3 Total Cache | 710ms | 2.1s | 89 (mobile) | High |
| WP Super Cache | 780ms | 2.5s | 85 (mobile) | Low |
🔍 Key Takeaways
✅ WP Rocket wins on ease and consistency
Even without tweaking, WP Rocket delivered the fastest and most reliable results. It’s especially valuable for non-technical users who want a high-performance site without diving into dozens of settings.
⚙️ LiteSpeed Cache is powerful — on the right server
LiteSpeed Cache performed well, but it’s built for LiteSpeed web servers. On NGINX (which we use at Red Jet), its full potential isn’t unlocked.
🧩 W3 Total Cache is a double-edged sword
It can perform well — but only if configured properly. It’s overwhelming for beginners, and easy to break site functionality.
💤 WP Super Cache is basic
It’s fast to set up, but doesn’t go far beyond page caching. Great for a small blog, but underpowered for WooCommerce, membership, or dynamic sites.
🧠 So Which Should You Choose?
If you want:
- Best performance with minimal fuss → Go with WP Rocket
- Free but powerful (and you’re on a LiteSpeed host) → LiteSpeed Cache
- Don’t mind tweaking and testing → W3 Total Cache
- Simple setup for a basic site → WP Super Cache
At Red Jet, we support all major caching plugins, but we’ve found WP Rocket delivers the best blend of speed, reliability, and simplicity for the vast majority of our clients.
⚡ Want Help Getting the Most from Caching?
Caching works best when paired with fast hosting, smart optimisation, and expert configuration. That’s what we do at Red Jet.
👉 Compare our hosting plans – all built for performance and include WP Rocket
👉 Request a free site audit – we’ll review your current setup and recommend improvements
Final Thoughts
Speed isn’t optional – it’s a ranking factor, a user experience booster, and a conversion driver. Whether you go with WP Rocket or a well-configured free plugin, the key is making sure it’s set up correctly and paired with the right hosting environment.
Need help deciding? We’re just a message away.
