1
At a glance the headline numbers for Image CDNs impact
Performance impact by image_cdn provider.
9
Providers ranked
After min-sites filter
27,247
Sites in sample
Combined across all items
1.8s
Best LCP (p75)
Fastly Image Optimizer
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by LCP at p75, fastest first
| # | Provider | LCP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Fastly Image Optimizer | 1.8s | 86.0% | 1,139 | |
| 2 | Imgix | 2.1s | 85.2% | 805 | |
| 3 | Uploadcare | 2.2s | 87.9% | 92 | |
| 4 | Bunny Image Optimizer | 2.2s | 81.2% | 17,146 | |
| 5 | Thumbor | 2.2s | 82.5% | 188 | |
| 6 | Akamai Image Manager | 2.3s | 78.7% | 7,230 | |
| 7 | Sirv | 2.5s | 79.5% | 57 | |
| 8 | Cloudinary | 2.5s | 75.4% | 512 | |
| 9 | ImageKit | 2.8s | 66.7% | 78 |
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
3
Passing LCP per provider which group passes the LCP most often
ProviderSitesPassing LCPp75
Uploadcare 0%
92
2.2s
Fastly Image Optimizer 0.6%
1,139
1.8s
imgix 0.4%
805
2.1s
Thumbor 0.1%
188
2.2s
Bunny Image Optimizer 9%
17,146
2.2s
Sirv 0%
57
2.5s
Akamai Image Manager 3.8%
7,230
2.3s
Cloudinary 0.3%
512
2.5s
ImageKit 0%
78
2.8s
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
86% of Fastly Image Optimizer sites pass LCP. Cloudinary trails 11 points behind. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · 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 9%
812.2s
93133ms
880.03
751.8s
591.2s
Akamai Image Manager 3.8%
792.3s
92136ms
870.03
741.8s
551.2s
Fastly Image Optimizer 0.6%
861.8s
91137ms
870.02
881.4s
77773ms
imgix 0.4%
852.1s
87157ms
860.05
841.5s
75807ms
Cloudinary 0.3%
752.5s
70220ms
690.17
731.9s
551.1s
Thumbor 0.1%
832.2s
89151ms
720.11
781.7s
71900ms
Uploadcare 0%
882.2s
86173ms
820.08
831.5s
80719ms
ImageKit 0%
672.8s
80170ms
880.03
642.0s
541.3s
Sirv 0%
802.5s
95124ms
870.03
602.2s
461.4s
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.
Fastly Image Optimizer leads on LCP: 86% of its sites pass. Cloudinary trails at 75%. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
Related signals
Search (5) →
Font services (4) →
Personalization (5) →
CDN (15) →
Chrome field data from 189,915 sites, representing millions of real page loads · How we measured
Chrome field data from 189,915 sites, representing millions of real page loads. How we measured.