Census › Plugin profiles › Speed Optimizer
Speed Optimizer – The All-In-One Performance-Boosting Plugin
Figures from the Plugin Directory Census · as of 28 Aug 2026
1M
Active installs, lower bound
Group: 1,000,000+ installs
3
Days since the last release
Group median: 8
4.2
out of 5, from 639 ratings
Group median: 4.7 (10+ ratings)
20.0%
Support threads marked resolved, two months
Group: 71.9%
Full profile on wordpress.orgShow on the mapCompare with your own plugins
What is Speed Optimizer and who is behind it?
Speed Optimizer is a WordPress plugin in the “Speed and caching” field, made by SiteGround. It has been listed in the directory since 25 Nov 2014, so for 11 years. SiteGround has 4 plugins with at least 10,000 installs in the census. With 1,000,000 to 1,999,999 active installs it belongs to the 1,000,000+ installs group; its last release came 3 days before the reference date, and it is tested up to WordPress 7.1.
This is how the author describes the plugin on wordpress.org:
“Boost your website performance and page speed, and increase conversions with powerful caching, frontend, media, and environment optimizations.”
Self-description on wordpress.org, retrieved on 10 Sept 2026
When was Speed Optimizer last released?
The last release of Speed Optimizer came 3 days before the reference date; the group median is 8 days.
How many installs does Speed Optimizer have?
Speed Optimizer had 1,000,000 to 1,999,999 active installs on the reference date. Within its group, 28 plugins had a higher band and 38 plugins the same band.
The API reports installs only as a lower bound with one significant figure: 1,000,000 means at least 1,000,000 and at most 1,999,999.
Which WordPress version is Speed Optimizer tested with?
No directory notice: tested up to WordPress 7.1, while core stood at 7.1 on the reference date. The notice appears once the field falls below 6.9; that applied to 3.0% of the group.
How does Speed Optimizer compare with its group?
The group holds 67 listed plugins. 22.4% of them had a more recent last release than Speed Optimizer; 1.5% had no release for more than 365 days.
| Figure | Speed Optimizer | Group, 67 plugins |
|---|---|---|
| Days since the last release | 3 | median 8 |
| Rating | 4.2 (639) | median 4.7 (10+ ratings) |
| Support threads marked resolved | 20.0% | 71.9% |
| Tested up to | 7.1 | 65.7% on 7.1 |
| Requires PHP | 7.0 | most often 7.4 (49.3%) |
All values on the reference date
| Slug | sg-cachepress |
|---|---|
| Author | SiteGround |
| Active installs | 1,000,000 to 1,999,999 |
| Last release | 3 days before the reference date |
| Tested up to | WordPress 7.1 · core on the reference date: 7.1 |
| Requires WordPress | 5.5 |
| Requires PHP | 7.0 |
| Rating | 4.2 out of 5 from 639 ratings |
| Support threads, two months | 1 of 5 marked resolved |
| Listed since | 25 Nov 2014 |
| Total downloads | 104,823,399, updates included |
| Tags | caching, nginx, performance, siteground, speed |
Tags
| Tag | Plugins with 10,000+ installs and this tag | Rank by installs | Median days since release |
|---|---|---|---|
| caching | 15 | 2 | 23 |
| nginx | 4 | 1 | 62 |
| performance | 65 | 3 | 11 |
| siteground | 3 | 1 | 8 |
| speed | 12 | 1 | 13 |
Rank 1 has the highest installation band among plugins with 10,000+ installs and this tag; equal bands share a rank.
Class of 2014
Speed Optimizer has been listed since 25 Nov 2014. Of the 190 plugins with 10,000+ installs added in 2014, 78.4% released within the 365 days before the reference date.
Same group, shared tags
Not a recommendation; the same figures for comparison. Alphabetical.
| Plugin | Active installs | Last release | Rating |
|---|---|---|---|
| AI Agent by SiteGround | 1,000,000 to 1,999,999 | 8 days before the reference date | 1.6 (93) |
| Image Optimization | 1,000,000 to 1,999,999 | 52 days before the reference date | 1.7 (77) |
| Jetpack | 3,000,000 to 3,999,999 | 8 days before the reference date | 3.7 (2,406) |
| LiteSpeed Cache | 7,000,000 to 7,999,999 | 23 days before the reference date | 4.8 (2,764) |
| ManageWP Worker | 1,000,000 to 1,999,999 | 7 days before the reference date | 4.6 (678) |
| WP Fastest Cache | 1,000,000 to 1,999,999 | 9 days before the reference date | 4.9 (4,224) |
| WP Super Cache | 1,000,000 to 1,999,999 | 2 days before the reference date | 4.3 (1,345) |
| WP-Optimize | 1,000,000 to 1,999,999 | 15 days before the reference date | 4.8 (2,606) |
Do you maintain Speed Optimizer?
If you maintain Speed Optimizer, you can link to this profile, for example from your readme or your website. Both snippets show this badge:
HTML
<a href="https://hafenstudios.com/en/census/plugins/sg-cachepress/"><img src="https://hafenstudios.com/census/plugins/badge-en.svg" alt="Speed Optimizer in the Plugin Directory Census 01/2026" width="220" height="40"></a>
Markdown
[](https://hafenstudios.com/en/census/plugins/sg-cachepress/)
The image is loaded from hafenstudios.com; as with every request, our server records the usual access data, which is deleted after 14 days. If you prefer not to, use a plain text link.
A value is wrong? Write to moin@hafenstudios.com; a documented correction leads to a new version.
How to cite
hafenstudios (2026): Speed Optimizer – The All-In-One Performance-Boosting Plugin, profile in the Plugin Directory Census 01/2026, reference date 28 Aug 2026. https://hafenstudios.com/en/census/plugins/sg-cachepress/
Source and status
All values come from the full pull of the public wordpress.org API on 28 Aug 2026 (reference time 21:56:30 UTC). The analysis and text on this page are available under CC BY 4.0; the raw values come from the public wordpress.org API and are in the raw data. How the count was made is set out in the method, what the fields do not say under limits. hafenstudios builds WordPress plugins itself, see the conflict of interest. Corrections to moin@hafenstudios.com; a documented correction leads to a new version. From issue 02 this page will also show the change since the previous reference date. Collected and prepared by Horst Wenzel.
Plugin names and trademarks belong to their owners. hafenstudios is not affiliated with the authors named here.
