1
At a glance the headline numbers for Image CDNs impact
Performance impact by image_cdn provider.
4
Providers ranked
After min-sites filter
7,599
Sites in sample
Combined across all items
2.8s
Best LCP (p75)
Akamai Image Manager
The State of Web Vitals · October 2026 · WordPress sites (63,295) · phone field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by LCP at p75, fastest first
| # | Provider | LCP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Akamai Image Manager | 2.8s | 66.3% | 2,234 | |
| 2 | Bunny Image Optimizer | 2.9s | 66.1% | 5,212 | |
| 3 | Fastly Image Optimizer | 2.9s | 56.1% | 61 | |
| 4 | Imgix | 3.0s | 69.4% | 92 |
The State of Web Vitals · October 2026 · WordPress sites (63,295) · phone field datacorewebvitals.io/state-of-cwv
3
Passing LCP per provider which group passes the LCP most often
ProviderSitesPassing LCPp75
Sirv 0% 6 2.5s
imgix 0.1% 92 3.0s
Akamai Image Manager 3.5% 2,234 2.8s
Bunny Image Optimizer 8.2% 5,212 2.9s
ImageKit 0% 8 2.6s
Fastly Image Optimizer 0.1% 61 2.9s
Cloudinary 0.1% 42 3.5s
Thumbor 0% 11 2.9s
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good LCP (2.5s at p75) · one value per site
No provider stands out: pass rates sit between 66% and 66%. computed
The State of Web Vitals · October 2026 · WordPress sites (63,295) · phone field datacorewebvitals.io/state-of-cwv
4
All five vitals at once the whole category without toggling - cell is the pass rate, small number the p75
LCP
INP
CLS
FCP
TTFB
Bunny Image Optimizer 8.2%
662.9s
96125ms
890.02
552.4s
301.9s
Akamai Image Manager 3.5%
662.8s
97125ms
880.02
562.3s
301.8s
imgix 0.1%
693.0s
93121ms
940.02
562.8s
301.6s
Fastly Image Optimizer 0.1%
562.9s
87129ms
840.04
442.6s
212.0s
Cloudinary 0.1%
523.5s
100130ms
790.01
502.6s
302.0s
Thumbor 0%
502.9s
100156ms
830.01
502.6s
332.2s
ImageKit 0%
602.6s
100170ms
1000.07
202.1s
201.7s
Sirv 0%
802.5s
100126ms
800.00
602.4s
01.7s
60%95%+ passing Cell: pass rate, small number = p75 · faded rows: under 100 sites
One row per provider, one column per vital - the cell is the share of sites passing, the small number the p75. No toggling needed to see where the category actually differs.
Bunny Image Optimizer leads on LCP: 66% of its sites pass. Akamai Image Manager trails at 66%. computed
The State of Web Vitals · October 2026 · WordPress sites (63,295) · phone field datacorewebvitals.io/state-of-cwv
Related signals Search (6) → Font services (4) → Personalization (6) → CDN (16) → 203,892 crawled sites with Chrome field data, representing millions of real page loads · How we measured
203,892 crawled sites with Chrome field data, representing millions of real page loads. How we measured.