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
121ms
Best INP (p75)
Imgix
The State of Web Vitals · October 2026 · WordPress sites (63,295) · phone field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by INP at p75, fastest first
| # | Provider | INP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Imgix | 121ms | 93.0% | 92 | |
| 2 | Bunny Image Optimizer | 125ms | 95.9% | 5,212 | |
| 3 | Akamai Image Manager | 125ms | 96.8% | 2,234 | |
| 4 | Fastly Image Optimizer | 129ms | 87.1% | 61 |
The State of Web Vitals · October 2026 · WordPress sites (63,295) · phone field datacorewebvitals.io/state-of-cwv
3
Passing INP per provider which group passes the INP most often
ProviderSitesPassing INPp75
Cloudinary 0.1% 42 130ms
Thumbor 0% 11 156ms
ImageKit 0% 8 170ms
Sirv 0% 6 126ms
Akamai Image Manager 3.5% 2,234 125ms
Bunny Image Optimizer 8.2% 5,212 125ms
imgix 0.1% 92 121ms
Fastly Image Optimizer 0.1% 61 129ms
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good INP (200ms at p75) · one value per site
No provider stands out: pass rates sit between 96% and 97%. 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.
Akamai Image Manager leads on INP: 97% of its sites pass. Bunny Image Optimizer trails at 96%. 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.