Free
$0.00
Every free feature on this page, on as many sites as you like.
- Unlimited sites
Zinn® Cache Pro
Find out what slows your WordPress site down, then fix it
Zinn® Cache Pro adds to the free Zinn® Cache plugin: analytics that show whether the cache is really working, a finder that names the plugin behind each slow query, a faster object cache, warm-up and lighter pages.
Built for speed and SEO. Zinn® Cache Pro adds 0 kB and 0 third-party requests to a page. Measured, not claimed. See the numbers →
Zinn® Cache Pro is an optional paid upgrade, from $49.00 a year, with a 14-day free trial. Zinn® hosting includes the free Zinn® Cache; this Pro edition is bought separately, for sites hosted with us or anywhere else. Already had a free trial? Buy now →
Hosting customer? Get 50% off your first payment of Zinn® Cache Pro. Get your code in the dashboard →
Built for speed and SEO
Page speed affects where Google ranks a page and how many visitors stay on it. So instead of telling you Zinn® Cache Pro is light, we installed it on a clean WordPress test site and measured what it adds to a page.
On the same test page, W3 Total Cache added +0.5 kB and 0 requests to other companies' servers. Zinn® Cache Pro added 0 kB and 0.
- 0 kBadded to the page: everything a visitor's browser downloads
- 0requests to other companies' servers
- 100 → 100Lighthouse performance score on phones, without the plugin → with it
- 91 → 91Lighthouse SEO score, without the plugin → with it
Measured on 2026-10-01: Zinn Cache 1.8.2 on a clean WordPress test site, using Lighthouse's test for phones, run 5 times and taking the middle result. Page weight counts everything a visitor's browser downloads within 15 seconds, including after a scroll. Every result, and how we measured it · Compare with other plugins
Why people choose Zinn® Cache Pro
See the cache working
Hit ratio, memory, evicted keys and the slowest Redis commands on one screen, so a cache that is quietly failing stops looking the same as one that works.
Names the plugin that is slow
A sample of real page views is measured and every slow query, slow outside call and cache miss is traced to the plugin or theme behind it.
Faster pages with no extra plugins
WebP and AVIF images, unused-CSS removal, delayed JavaScript, warm-up and database clean-up in one add-on, with safe defaults for checkout and consent tools.
Everything about the Zinn® cache plugins, on their own site
Which of the two plugins you need, a benchmark measured on a real site, step-by-step guides from installing to clearing the cache and turning on Redis, and fair comparisons with WP Rocket, LiteSpeed Cache, W3 Total Cache and WP Super Cache.
What Zinn® Cache Pro does
Zinn® Cache Pro installs on top of the free Zinn® Cache plugin and adds what a busy site needs to find and remove what is slowing it down: cache analytics, a slow-query and uncached-call finder, a faster object cache, smarter purging, warm-up, and image, CSS and JavaScript optimisation. It is sold as an annual licence through Freemius, for one site, five sites or unlimited sites, with a free trial and no card needed.
Why it matters
A cache that works is not the same as a cache that is working well. A plugin that bypasses the cache on every page view, a slow query in a theme, or Redis quietly running out of memory all look the same from the outside: a slow site. Zinn® Cache Pro measures a sample of real page views, names the plugin or theme responsible, and then makes each cached read cheaper.
What is in it
8 free features and 13 more in Pro, listed from the plugin itself, so this page changes when the plugin does.
Page cache
- Full-page cache on any serverFreeLiteSpeed's own cache where the server has it, and a file cache served from advanced-cache.php everywhere else. Only visitors who are not signed in get stored pages.
- Safe exclusions for shopsFreeCart, checkout and account pages, previews, search and signed-in visitors are never cached. Add your own paths, query keys and cookies per site.
Object cache
- Redis object cache that proves it worksFreePassword or Redis 6 ACL sign-in, the usual WP_REDIS settings, and a write-and-read round trip that says why Redis refused instead of caching nothing.
- Works with your host's cacheFreeA host can manage the object cache for you. The plugin never overwrites another plugin's drop-in, and refreshes its own after an update.
- An in-memory tier in front of RedisProThe most-read groups (options, posts, terms, users) are kept in APCu on the server, so the hottest reads never leave the machine.
- More data in the same memoryProzstd, lzf or gzip compression, whichever the server has, plus the igbinary serializer, so the same Redis memory holds more of your site.
- PrefetchingProEach page loads the cache keys it needed last time in one request instead of one at a time.
Purging and warm-up
- Purges only what changedFreeSaves, comments, term edits, theme switches and updates each clear the pages they affect, by cache tag, rather than the whole site.
- Purge from your own scriptsFreeA signed REST endpoint purges everything, a list of URLs or a set of tags, so a deploy script can clear the cache.
- Smarter purging for WooCommerceProA stock or price change clears the product with its shop and category pages, and the page and object caches are purged together.
- Cache warm-upProAfter a purge the cache refills itself, one page at a time, picking up where it left off and slowing down when the server is busy.
- Works with Zinn® SEOFreeChange an SEO title, description or redirect in Zinn® SEO and only the pages it affects leave the cache, so visitors and search engines see the change straight away.
Lighter pages
- WebP and AVIF imagesProModern image formats are made beside your originals and served to browsers that support them. One click removes them again.
- Remove unused CSSProEach page loads only the CSS it uses, with safe defaults that leave checkout and consent tools alone.
- Delay JavaScriptProScripts that are not needed straight away wait until the visitor interacts, which shortens the time to a usable page.
- Database clean-up with a previewProRevisions, auto-drafts, spam, trash and orphaned metadata removed on a schedule, after showing exactly what will go.
See what is slow
- Cache analyticsProHit ratio, reads and writes, memory used, keys evicted, the average Redis command time and the slowest recent commands, on one screen.
- Slow-query and uncached-call finderProOne page view in 20 is measured. Slow queries, slow calls to other websites and cache misses are each traced to the plugin or theme responsible.
- Health alerts in your dashboardProOn a site hosted with Zinn Digital®, cache health is reported every hour and you are emailed when the hit ratio drops or Redis fills.
Control and automation
- AI assistants can run itFreeClaude, Cursor and other MCP clients can read the status, change settings and purge, signed in as you and limited to what you may do.
- Per-page cache rulesProDifferent cache lifetimes and exclusions for different parts of the site, and every Pro setting available to your AI assistant.
Free or Pro?
Everything in the free plugin stays free. Pro adds the rest, on top of it.
| FreeFree forever | ProFrom $49.00 a year | |
|---|---|---|
| Page cache | ||
| Full-page cache on any server | Yes | Yes |
| Safe exclusions for shops | Yes | Yes |
| Object cache | ||
| Redis object cache that proves it works | Yes | Yes |
| Works with your host's cache | Yes | Yes |
| An in-memory tier in front of Redis | No | Yes |
| More data in the same memory | No | Yes |
| Prefetching | No | Yes |
| Purging and warm-up | ||
| Purges only what changed | Yes | Yes |
| Purge from your own scripts | Yes | Yes |
| Smarter purging for WooCommerce | No | Yes |
| Cache warm-up | No | Yes |
| Works with Zinn® SEO | Yes | Yes |
| Lighter pages | ||
| WebP and AVIF images | No | Yes |
| Remove unused CSS | No | Yes |
| Delay JavaScript | No | Yes |
| Database clean-up with a preview | No | Yes |
| See what is slow | ||
| Cache analytics | No | Yes |
| Slow-query and uncached-call finder | No | Yes |
| Health alerts in your dashboard | No | Yes |
| Control and automation | ||
| AI assistants can run it | Yes | Yes |
| Per-page cache rules | No | Yes |
Pricing for Zinn® Cache Pro
Prices in US dollars, per year, charged by Freemius, the licensing service we sell through. Every paid plan starts with a 14-day free trial with no card needed.
Personal
$49.00per year
- 1 site
- Everything in Free, plus every Pro feature
Already had a free trial? Buy now →
BusinessRecommended
$99.00per year
- 5 sites
- Everything in Free, plus every Pro feature
Already had a free trial? Buy now →
Agency
$199.00per year
- Unlimited sites
- Everything in Free, plus every Pro feature
Already had a free trial? Buy now →
Hosting customer? Get 50% off your first payment of Zinn® Cache Pro. Get your code in the dashboard →
Zinn® Cache compared with other WordPress cache plugins
What each plugin's own pages said on the day we checked. A dash means we could not confirm it there, not that the feature is missing. Our column counts Zinn® Cache and Zinn® Cache Pro together.
| Zinn® Cache | WP Rocket | LiteSpeed Cache | W3 Total Cache | WP Super Cache | |
|---|---|---|---|---|---|
| Page weight added (measured) | 0 kB | — | 0 kB1 | +0.5 kB1 | 0 kB1 |
| Third-party requests added (measured) | 0 | — | 01 | 01 | 01 |
| Mobile Lighthouse impact (score without → with) | 100 → 100 | — | 100 → 1001 | 100 → 1001 | 100 → 1001 |
| Free version | Yes | No2 | Yes3 | Yes4 | Yes5 |
| Paid plan for one site, per year | $49.00 | €49.952 | — | $996 | — |
| Full-page cache on any web server | Yes | Yes2 | Partial support3 | Yes4 | Yes5 |
| Redis object cache built in | Yes | No7 | Yes3 | Yes4 | — |
| Makes WebP and AVIF images | Yes | — | Yes3 | Yes4 | — |
| Removes unused CSS | Yes | Yes8 | Yes9 | Yes4 | — |
| Delays JavaScript until interaction | Yes | Yes10 | Yes3 | Yes4 | — |
| Database clean-up | Yes | Yes10 | Yes3 | — | — |
| Cache hit-rate statistics | Yes | — | — | Yes6 | — |
| MCP server for AI assistants | Yes | Yes11 | — | — | — |
Sources, and the day we checked them
- https://zinndigital.com/plugins/speed-2026-10-01.json
- https://wp-rocket.me/pricing/
- https://wordpress.org/plugins/litespeed-cache/
- https://wordpress.org/plugins/w3-total-cache/
- https://wordpress.org/plugins/wp-super-cache/
- https://www.boldgrid.com/w3-total-cache/
- https://docs.wp-rocket.me/article/673-what-is-opcache
- https://docs.wp-rocket.me/article/1529-remove-unused-css
- https://docs.litespeedtech.com/lscache/lscwp/pageopt/
- https://wp-rocket.me/features/
- https://wp-rocket.me/mcp-wordpress/
✓ yes · • partly, or only on a paid plan or add-on · ✕ no · — not confirmed on their own pages Competitor facts last checked on 2026-10-01. Something out of date? Tell us and we will correct it. The speed rows were measured on 2026-10-01 on a clean WordPress test site: the same page, each plugin's free version, Lighthouse's test for phones run 5 times, taking the middle result. In those rows, — means not measured, because the plugin is paid-only or needs an account we did not create.
See Zinn® Cache Pro at work
The slow-query finder traces every slow query and slow outside call to the plugin or theme that made it, so you know exactly what to fix.
What you are downloading
The facts about the file, the requirements and how to install it.
- Version
- 2.3.6
- Minimum WordPress
- WordPress 6.6
- Minimum PHP
- PHP 8.2
- Tested up to
- WordPress 7.1
- Licence
- GNU General Public License, version 2 or later
- Written by
- Neil Lock — CEO, Zinn Digital® Ltd
What Zinn® Cache Pro needs
WordPress 6.6 or later, PHP 8.2 or later, and the free Zinn® Cache plugin, which Zinn® Cache Pro builds on. The object-cache features need Redis with the phpredis extension; the APCu tier needs the APCu extension.
How you get Zinn® Cache Pro
Buy it here or start the free trial from the Pro tab in Zinn® Cache's settings. Freemius handles the checkout, the licence and the updates. Zinn® Cache Pro is not included with Zinn Digital® hosting; the free Zinn® Cache plugin is.
Questions about Zinn® Cache Pro
Does Pro replace the free Zinn® Cache plugin?
No. Pro installs on top of it. The free plugin keeps doing the page cache and the Redis object cache, and Pro's features are loaded by the free plugin's own drop-in, so nothing is swapped.
Is there a free trial?
Yes, 14 days on every plan, with no card needed. Start it from the Pro tab of the Zinn® Cache screen in wp-admin, or from this page.
What happens when my licence ends?
The Pro features stop within a few days and the free plugin carries on caching exactly as before. Values Pro compressed are simply rebuilt by WordPress.
Is Pro included with Zinn Digital® hosting?
No. The free Zinn® Cache plugin is installed on every WordPress site we host. Pro is bought separately, and hosting customers get a one-off discount on their first payment.
What does the server need?
WordPress 6.6 or later, PHP 8.2 or later and the free Zinn® Cache plugin. The object-cache features need Redis with phpredis; the in-memory tier needs the APCu extension.
Updates
On a site we host, these plugins are configured to update themselves: they check with us and WordPress installs the new version for you, with the download verified against its published checksum first. On a WordPress we do not host, there is nothing to configure and nothing phones home — come back to this page when you want the newest version, or watch the plugin's GitHub releases.
Need an older version?
Customers can download the newest release of each of the two previous major versions of every plugin in the Zinn Digital® app. It is there for a site that cannot run the current version yet — one still on an older WordPress or PHP — and for rolling back an update that caused a problem. When you can, install the current version.
Get Zinn® Cache Pro working on a real site
Zinn® Cache Pro runs on any WordPress site, wherever it is hosted. Every WordPress site we host also comes with our free plugins already installed.