Head-to-head · October 2026
Admin CSS MU vs Mu Manager
Mu Manager comes out ahead, winning 6 of 8 head-to-head checks against Admin CSS MU.
Admin CSS MU
A simple plugin that lets you add your custom CSS to style the WordPress Admin. Works with WordPress single…
Mu Manager
With Mu Manager you can manage the mu-plugins like the standard plugins. You can disable, enable, delete…
| Metric | Admin CSS MU | Mu Manager |
|---|---|---|
| Active installs | 10K+ | 900+ |
| Downloads (30 days) | 712 | 779 |
| Download trend | +26.7% | +278.2% |
| Rating | 4.5/5 | 5/5 |
| Reviews | 26 | 7 |
| Health score | 48/100 | 82/100 |
| Last updated | 2 years ago | 3 days ago |
| Tested up to | WP 6.7.10 | WP 7.1.3 |
| Support resolved | — | — |
| Requires PHP | 7.0+ | 5.6+ |
| First released | Jun 2012 | May 2022 |
Daily downloads, last 90 days
Admin CSS MUMu Manager
Choose Admin CSS MU if…
You care most about active installs and reviews.
- Proven at scale on 10K+ active sites
- Loved by users — 4.5/5 from 26 reviews
- Momentum — downloads up 26.7% vs the previous 30 days
- No update in over a year
- Only tested up to WordPress 6.7 (latest is 7.1)
Choose Mu Manager if…
You care most about downloads (30 days), download trend and rating.
- Actively developed — last update 3 days ago
- Tested with the latest WordPress (7.1)
- Momentum — downloads up 278.2% vs the previous 30 days
- Small user base (900+ active installs)
Both compete in: mu plugin
FAQ
Admin CSS MU vs Mu Manager: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 19, 2026
Which is better, Admin CSS MU or Mu Manager?
Mu Manager comes out ahead, winning 6 of 8 head-to-head checks against Admin CSS MU. Choose Admin CSS MU if you care most about active installs and reviews. Choose Mu Manager if you care most about downloads (30 days), download trend and rating.
Is Admin CSS MU more popular than Mu Manager?
Admin CSS MU is the more popular of the two with 10K+ active installs, compared with 900+ for Mu Manager.
Can I use Admin CSS MU and Mu Manager together?
Both plugins cover mu plugin, 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 Admin CSS MU and Mu Manager 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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