# WordPress caching plugin complaints: what 35 bad reviews say

> 35 one- and two-star WordPress.org reviews of 12 WordPress caching plugins: top complaints, reply rates, worst-hit plugins and quotes.

Canonical: https://revunda.xyz/apps/wordpress-plugin-complaints/caching-speed/
Language: en
Last updated: 2026-10-25

35 one- and two-star WordPress.org reviews (31 one-star) of the 12 most-installed plugins in the Caching & speed category, posted 26 Oct 2025 – 25 Oct 2026. Combined: 14,700,000+ active installs.

**34.3%**Bugs & errors

**60%**got a developer reply (all plugins: 70.2%)

**2.4**bad reviews per million installs (all plugins: 3.5)

## What users complain about in WordPress caching plugins

| Complaint | Share | Reviews | All plugins |
|---|---|---|---|
| Bugs & errors | 34.3% | 12 | 32.5% |
| Slows the site or heavy | 17.1% | 6 | 8.8% |
| AI features or AI support | 11.4% | 4 | 6.1% |
| Crashed or took down the site | 11.4% | 4 | 5.4% |
| Missing features & limits | 11.4% | 4 | 5.9% |
| Hard to use or set up | 5.7% | 2 | 9.3% |
| Conflicts with other plugins or themes | 2.9% | 1 | 1.9% |
| Lost data, content or settings | 2.9% | 1 | 0.7% |
| Slow or no support | 2.9% | 1 | 18% |
| Broke after an update | 2.9% | 1 | 8.5% |
| Upsell, paywall & pushy Pro version | 2.9% | 1 | 14.9% |

A review can match several themes; 28.6% match none. “All plugins” = 578 low-star reviews of 138 plugins in 12 categories.

## What is different about this category

Compared with all 138 plugins in the study, caching plugin reviews mention **slows the site or heavy** 1.9× as often (17.1% vs 8.8%). They mention ads, nags & admin clutter (0% vs 4.5%) and charges, renewals & refunds (0% vs 11.1%) less often than average.

## WordPress caching plugins by number of bad reviews

| Plugin | 1–2★ | Top complaint (5+ reviews) | Replied | Installs |
|---|---|---|---|---|
| Speed Optimizer | 8 | Bugs & errors 37.5% | 87.5% | 1,000,000+ |
| LiteSpeed Cache | 7 | Bugs & errors 42.9% | 100% | 7,000,000+ |
| WP-Optimize | 7 | Bugs & errors 28.6% | 14.3% | 1,000,000+ |
| W3 Total Cache | 7 | Slows the site or heavy 28.6% | 0% | 900,000+ |
| Autoptimize | 3 | – | 100% | 800,000+ |
| WP Super Cache | 1 | – | 100% | 1,000,000+ |
| Redis Object Cache | 1 | – | 100% | 500,000+ |
| SpeedyCache | 1 | – | 100% | 500,000+ |
| WP Fastest Cache | 0 | – | – | 1,000,000+ |
| Custom Fonts | 0 | – | – | 400,000+ |
| AMP | 0 | – | – | 300,000+ |
| OMGF | 0 | – | – | 300,000+ |

## In users’ words

> “… It slowed down my site and caused errors with my hosting. Beware that it will fill up your database and cost you money!”
>
> WordPress.org review, Oct 2026

> “Don’t know why, suddenly this plugin makes the admin dashboard very slow.”
>
> WordPress.org review, Oct 2026

> “… What’s worse is that siteground installed an AI plugin on our website, literally the least secure, highest risk and fastest growing (which also means least stable) tech that exists today.”
>
> WordPress.org review, Jun 2026

> “… The user (me) encountered a white screen and a redirect loop on their WordPress login page, which was caused by a corrupted caching plugin and damaged core files following a failed update.”
>
> WordPress.org review, Feb 2026

> “Went through the wizard and poof, my site doesn’t have background images anymore.”
>
> WordPress.org review, Nov 2025

## Do WordPress caching developers reply to bad reviews?

60% of these low-star reviews got a reply from the author or support team, median 0 days after the review (all plugins: 70.2%, median 1 day).

## What to fix first (our reading of the data)

1. **Bugs & errors** (34.3% of reviews): Reply to each bug review with the version that fixes it, and test against the most popular themes and PHP versions.
2. **Slows the site or heavy** (17.1% of reviews): Load assets only on pages that use the plugin.
3. **AI features or AI support** (11.4% of reviews): Make AI features optional and clearly labelled; don’t replace human support with a bot.

## This breakdown for your plugin

Your plugin’s low-star reviews by theme, with quotes and reply rate. Revunda has no self-serve WordPress.org report yet: send the plugin URL and we reply with what we can do.

[Request it for my plugin](mailto:hello@revunda.xyz?subject=WordPress%20plugin%20review%20breakdown) [Free App Store review check](https://revunda.xyz/apps/check/)

Other categories: [Page builders & blocks](https://revunda.xyz/apps/wordpress-plugin-complaints/page-builders-blocks/) · [Backup & migration](https://revunda.xyz/apps/wordpress-plugin-complaints/backup-migration/) · [WooCommerce & payments](https://revunda.xyz/apps/wordpress-plugin-complaints/woocommerce-payments/) · [SEO](https://revunda.xyz/apps/wordpress-plugin-complaints/seo/) · [Cookies & privacy](https://revunda.xyz/apps/wordpress-plugin-complaints/cookies-privacy/) · [Images, galleries & sliders](https://revunda.xyz/apps/wordpress-plugin-complaints/images-galleries-sliders/) · [Security & anti-spam](https://revunda.xyz/apps/wordpress-plugin-complaints/security-anti-spam/) · [Forms](https://revunda.xyz/apps/wordpress-plugin-complaints/forms/) · [Translation](https://revunda.xyz/apps/wordpress-plugin-complaints/translation/) · [Email & SMTP](https://revunda.xyz/apps/wordpress-plugin-complaints/email-smtp/) · [Analytics](https://revunda.xyz/apps/wordpress-plugin-complaints/analytics/)

Data and method: [WordPress review study](https://revunda.xyz/apps/research/wordpress-plugin-review-complaints-2026/) (138 plugins, CC BY 4.0 CSV) · [WordPress plugin 1-star reviews: what to fix first](https://revunda.xyz/apps/wordpress-plugin-1-star-reviews/) · [All categories](https://revunda.xyz/apps/wordpress-plugin-complaints/)

## FAQ

### What do users complain about most in WordPress caching plugins?

In 35 one- and two-star WordPress.org reviews of 12 WordPress caching plugins (Oct 2025 – Oct 2026), the top complaints were bugs & errors (34.3%), slows the site or heavy (17.1%), ai features or ai support (11.4%).

### Do WordPress caching plugin developers reply to bad reviews?

60% of these low-star reviews got a reply from the author or support team, median 0 days after the review (all plugins: 70.2%, median 1 day).

### Which WordPress caching plugin had the most bad reviews?

Speed Optimizer, with 8 one- and two-star reviews in the 12 months to Oct 2026.

### How many bad reviews do caching plugins get per million installs?

2.4 low-star reviews per million active installs over 12 months, against 3.5 across all 138 plugins in the study.

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