Shift8 CDN vs Sirv (September 2026)
Updated September 7, 2026 · Data from WordPress.org, refreshed daily · How this works
Both rank in the WordPress.org CDN Plugins top 10: Shift8 CDN at #8 and Sirv at #7. Sirv leads on 4 of the 5 measures we track. Every number below comes straight from WordPress.org and is refreshed every day.
Shift8 CDN
This is a plugin that integrates a 100% free CDN service operated by Shift8, for your Wordpress site. What this means is that you can simply install t …
Sirv
Image Optimizer, Resizer and CDN – Sirv
Serve perfectly optimized images, videos, models and 360 spins. The best WordPress & WooCommerce CDN plugin for media.
Who leads on what
Sirv leads on 4 of the 5 measures we track.
Sirv ranks higher on WordPress.org: #7 against #8 in CDN Plugins.
Sirv has more users: 1,000+ active installs against 500+.
Not enough reviews to compare ratings fairly: Shift8 CDN has 40, Sirv has 265. We compare ratings only above 50 reviews each.
Sirv has more reviews behind its score: 265 against 40.
Sirv was updated more recently, on August 19, 2026; Shift8 CDN on February 10, 2026.
Which one to pick
Each plugin is the better answer for the measure it actually leads on. Nothing here is a recommendation we invented.
Shift8 CDN
Shift8 CDN does not lead on any measure we track, so pick it only for something these numbers cannot show, such as a feature you need.
Sirv
Pick Sirv if you go by where WordPress.org itself puts them, you want the plugin more sites already run, you want the score backed by more reviews or you want the one shipping releases most recently.
Shift8 CDN vs Sirv side by side
| Shift8 CDN | Sirv | |
|---|---|---|
| CDN Plugins ranking | #8 | #7 |
| Rating | 4.4 | 4.9 |
| Reviews | 40 | 265 |
| Active installs | 500+ | 1,000+ |
| Total downloads | 73,088 | 136,218 |
| Downloads, last 30 days | – | – |
| Last updated | Feb 10, 2026 | Aug 19, 2026 |
| First published | May 19, 2019 | Jul 23, 2015 |
| Tested up to WordPress | 6.9.7 | 7.1 |
| Requires PHP | 7.4 | 5.6 |
| Pricing | Free on WordPress.org | Free on WordPress.org |
30-day download figures appear after both plugins have 30 days of tracking.
Shift8 CDN ratings
Sirv ratings
How we compare these two
Every figure here is pulled from the WordPress.org plugin API every day at 03:00 UTC, for both plugins in the same run, so the two are always read on the same day. We compare only what the directory reports: active installs, the rating and how many reviews stand behind it, the last release date and, once we have a month of history, downloads over the last 30 days. Ratings are only called a win above 50 reviews each, because a handful of five-star reviews is not evidence. Nothing is weighted into an overall score, no measure is worth more than another, and neither Shift8 CDN nor Sirv can pay to appear here: the pair exists only because both plugins reached the CDN Plugins top 10. Full methodology.
Shift8 CDN vs Sirv: common questions
Is Shift8 CDN better than Sirv?
Sirv leads on 4 of the 5 measures we track. Neither is better at everything, and the answer depends on which measure you weigh. Sirv ranks higher on WordPress.org: #7 against #8 in CDN Plugins.
Which has more users, Shift8 CDN or Sirv?
Sirv ranks higher on WordPress.org: #7 against #8 in CDN Plugins.
Which is rated higher, Shift8 CDN or Sirv?
Sirv has more users: 1,000+ active installs against 500+.
Are Shift8 CDN and Sirv free?
Both are free to install from WordPress.org. Shift8 CDN may also sell a paid version or add-ons. Sirv may also sell a paid version or add-ons.
Alternatives to Shift8 CDN and Sirv
Plugins that score close to both in the same WordPress.org rankings and tags.
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What moved this week
One email a week, built from the same daily snapshots these rankings come from: the plugins that climbed, what launched, and one ranking worth a look.