1
At a glance the headline numbers for Image CDNs impact
Performance impact by image_cdn provider.
9
Providers ranked
After min-sites filter
27,273
Sites in sample
Combined across all items
124ms
Best INP (p75)
Sirv
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by INP at p75, fastest first
| # | Provider | INP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Sirv | 124ms | 94.7% | 57 | |
| 2 | Bunny Image Optimizer | 133ms | 93.0% | 17,162 | |
| 3 | Akamai Image Manager | 136ms | 92.4% | 7,236 | |
| 4 | Fastly Image Optimizer | 137ms | 90.8% | 1,142 | |
| 5 | Thumbor | 151ms | 88.5% | 188 | |
| 6 | Imgix | 156ms | 87.0% | 805 | |
| 7 | ImageKit | 170ms | 80.0% | 79 | |
| 8 | Uploadcare | 175ms | 86.3% | 92 | |
| 9 | Cloudinary | 220ms | 70.2% | 512 |
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
3
Passing INP per provider which group passes the INP most often
ProviderSitesPassing INPp75
Sirv 0% 57 124ms
Bunny Image Optimizer 9% 17,162 133ms
Akamai Image Manager 3.8% 7,236 136ms
Fastly Image Optimizer 0.6% 1,142 137ms
Thumbor 0.1% 188 151ms
imgix 0.4% 805 156ms
Uploadcare 0% 92 175ms
ImageKit 0% 79 170ms
Cloudinary 0.3% 512 220ms
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 23 points behind, leaving 30% of its sites failing. 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
ImageKit 0%
672.7s
80170ms
880.02
642.0s
541.3s
Sirv 0%
802.4s
95124ms
870.03
602.2s
461.4s
Akamai Image Manager 3.8%
792.3s
92136ms
860.03
741.8s
551.2s
Bunny Image Optimizer 9%
812.2s
93133ms
880.03
751.8s
591.2s
imgix 0.4%
852.1s
87156ms
860.05
841.5s
75807ms
Thumbor 0.1%
832.3s
88151ms
720.11
781.8s
70909ms
Fastly Image Optimizer 0.6%
861.8s
91137ms
870.02
881.4s
77772ms
Uploadcare 0%
882.2s
86175ms
820.08
831.5s
80719ms
Cloudinary 0.3%
752.5s
70220ms
690.17
731.9s
551.1s
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 70%. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
Related signals Search (6) → Font services (4) → Personalization (6) → CDN (16) → 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.