Head-to-head · October 2026
WP CSS Merge vs WP-Optimize
WP-Optimize comes out ahead, winning 6 of 6 head-to-head checks against WP CSS Merge.
WP CSS Merge
WP CSS Merge reduces compatible frontend stylesheet requests by combining local CSS files into cached bundles.
WP-Optimize
MORE THAN A CACHING PLUGIN WP-Optimize is trusted by more than 1 million WordPress website owners to boost…
| Metric | WP CSS Merge | WP-Optimize |
|---|---|---|
| Active installs | <10 | 1M+ |
| Downloads (30 days) | 95 | 752.6K |
| Download trend | -22.8% | +211.2% |
| Rating | — | 4.8/5 |
| Reviews | 0 | 2,616 |
| Health score | 60/100 | 92/100 |
| Last updated | 1 month ago | 3 weeks ago |
| Tested up to | WP 7.1.3 | WP 7.1.3 |
| Support resolved | — | 64% |
| Requires PHP | 7.4+ | 7.2+ |
| First released | Oct 2019 | Jan 2009 |
Daily downloads, last 90 days
WP CSS MergeWP-Optimize
Choose WP CSS Merge if…
You prefer its feature set and workflow — it holds its own on the fundamentals.
- Tested with the latest WordPress (7.1)
- Small user base (<10 active installs)
- Very few reviews so far
Choose WP-Optimize if…
You care most about active installs, downloads (30 days) and download trend.
- One of the most-used plugins on the web — 1M+ active sites
- Loved by users — 4.8/5 from 2,616 reviews
- Actively developed — last update 3 weeks ago
- Tested with the latest WordPress (7.1)
- Momentum — downloads up 211.2% vs the previous 30 days
Both compete in: cache
FAQ
WP CSS Merge vs WP-Optimize: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 10, 2026
Which is better, WP CSS Merge or WP-Optimize?
WP-Optimize comes out ahead, winning 6 of 6 head-to-head checks against WP CSS Merge. Choose WP-Optimize if you care most about active installs, downloads (30 days) and download trend.
Is WP CSS Merge more popular than WP-Optimize?
WP-Optimize is the more popular of the two with 1M+ active installs, compared with <10 for WP CSS Merge.
Can I use WP CSS Merge and WP-Optimize together?
Both plugins cover cache, so most sites only need one. Running two plugins that do the same job can cause conflicts and slow your site down — pick the one that fits best and remove the other.
Are WP CSS Merge and WP-Optimize free?
Yes. Both are free to download from the official WordPress.org plugin directory. Either may also offer paid upgrades from its developer.
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