1
At a glance the headline numbers for Image CDNs impact
Performance impact by image_cdn provider.
7
Providers ranked
After min-sites filter
14,356
Sites in sample
Combined across all items
132ms
Best INP (p75)
Bunny Image Optimizer
The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by INP at p75, fastest first
| # | Provider | INP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Bunny Image Optimizer | 132ms | 93.1% | 9,022 | |
| 2 | Fastly Image Optimizer | 135ms | 90.5% | 596 | |
| 3 | Akamai Image Manager | 136ms | 92.9% | 3,876 | |
| 4 | Thumbor | 156ms | 82.8% | 96 | |
| 5 | Imgix | 162ms | 87.8% | 432 | |
| 6 | Uploadcare | 191ms | 80.0% | 54 | |
| 7 | Cloudinary | 199ms | 74.8% | 280 |
The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv
3
Passing INP per provider which group passes the INP most often
ProviderSitesPassing INPp75
Sirv 0% 30 110ms
Bunny Image Optimizer 9.5% 9,022 132ms
Akamai Image Manager 4.1% 3,876 136ms
Fastly Image Optimizer 0.6% 596 135ms
imgix 0.5% 432 162ms
Thumbor 0.1% 96 156ms
ImageKit 0% 40 144ms
Uploadcare 0.1% 54 191ms
Cloudinary 0.3% 280 199ms
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good INP (200ms at p75) · one value per site
93% of Bunny Image Optimizer sites pass INP. Cloudinary trails 18 points behind. computed
The State of Web Vitals · Q1 2026 · 94,910 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 9.5%
822.2s
93132ms
880.03
761.8s
601.1s
Akamai Image Manager 4.1%
792.3s
93136ms
870.03
751.8s
561.2s
Fastly Image Optimizer 0.6%
871.8s
91135ms
880.02
871.4s
78758ms
imgix 0.5%
852.1s
88162ms
870.04
841.5s
75790ms
Cloudinary 0.3%
752.5s
75199ms
710.16
731.8s
571.1s
Thumbor 0.1%
832.2s
83156ms
710.11
831.5s
80680ms
Uploadcare 0.1%
882.1s
80191ms
830.08
861.5s
78736ms
ImageKit 0%
643.2s
81144ms
880.02
602.1s
541.4s
Sirv 0%
772.5s
94110ms
830.04
612.4s
371.6s
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 INP: 93% of its sites pass. Cloudinary trails at 75%. computed
The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv
Related signals Search (4) → Font services (4) → Personalization (5) → CDN (15) → Chrome field data from 94,910 sites, representing millions of real page loads · How we measured
Chrome field data from 94,910 sites, representing millions of real page loads. How we measured.