# CSS JS Manager, Async Jav… vs Speed Up

> CSS JS Manager, Async Jav… vs Speed Up compared on installs, downloads, ratings, updates, compatibility and support. CSS JS Manager, Async JavaS… comes out ahead, winning 6 of 8 head-to-head checks against Speed Up.

**CSS JS Manager, Async JavaS… comes out ahead, winning 6 of 8 head-to-head checks against Speed Up.** Choose CSS JS Manager, Async JavaS… if you care most about active installs, downloads (30 days) and reviews. Choose Speed Up if you care most about download trend and rating.

| | CSS JS Manager, Async JavaScript, Defer Render Blocking CSS | Speed Up – Optimize CSS Delivery |
|---|---|---|
| Active installs | 1K+ ✅ | 500+ |
| Downloads (30 days) | 744 ✅ | 237 |
| Download trend | -52.5% | +10.2% ✅ |
| Rating | 4.8/5 | 5/5 ✅ |
| Reviews | 90 ✅ | 8 |
| Health score | 82/100 ✅ | 73/100 |
| Last updated | 2 months ago ✅ | 3 months ago |
| Tested up to | WP 7.1.3 ✅ | WP 7.0.7 |
| Support resolved | — | — |
| Requires PHP | Any | 7.0+ |
| First released | Jan 2019 | Dec 2016 |

## Frequently asked questions

### Which is better, CSS JS Manager, Async JavaS… or Speed Up?
CSS JS Manager, Async JavaS… comes out ahead, winning 6 of 8 head-to-head checks against Speed Up. Choose CSS JS Manager, Async JavaS… if you care most about active installs, downloads (30 days) and reviews. Choose Speed Up if you care most about download trend and rating.

### Is CSS JS Manager, Async JavaS… more popular than Speed Up?
CSS JS Manager, Async JavaS… is the more popular of the two with 1K+ active installs, compared with 500+ for Speed Up.

### Can I use CSS JS Manager, Async JavaS… and Speed Up together?
Both plugins cover async css and defer css, 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 CSS JS Manager, Async JavaS… and Speed Up 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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Source: live WordPress.org data · HTML version: https://pageforge.pro/directory/compare/css-js-manager-vs-speed-up-optimize-css-delivery/ · Generated 2026-10-17 20:07 UTC by PageForge