The State of Web Vitals

Image CDNs impact

Performance impact by image_cdn provider.

Field data PhoneDesktopAll Scope All sites Q2 2026 edition · All devices field outcomes
Metric LCP INP CLS
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
111ms
Best INP (p75)
Sirv
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
2

The ranking sorted by INP at p75, fastest first

# Provider INP p75 Passing Sites
1 Sirv 111ms 95.7%
57
2 Bunny Image Optimizer 113ms 95.7%
17,146
3 Akamai Image Manager 116ms 95.5%
7,230
4 Fastly Image Optimizer 118ms 92.8%
1,139
5 Thumbor 133ms 94.7%
188
6 Imgix 136ms 91.1%
805
7 ImageKit 147ms 83.9%
78
8 Uploadcare 154ms 88.1%
92
9 Cloudinary 182ms 76.4%
512
The State of Web Vitals · Q2 2026 · 189,915 sites · all devices field datacorewebvitals.io/state-of-cwv
3

Passing INP per provider which group passes the INP most often

ProviderSitesPassing INPp75
Sirv 0% 57 96% 111ms
Bunny Image Optimizer 9% 17,146 96% 113ms
Akamai Image Manager 3.8% 7,230 96% 116ms
Thumbor 0.1% 188 95% 133ms
Fastly Image Optimizer 0.6% 1,139 93% 118ms
imgix 0.4% 805 91% 136ms
Uploadcare 0% 92 88% 154ms
ImageKit 0% 78 84% 147ms
Cloudinary 0.3% 512 76% 182ms
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good INP (200ms at p75) · one value per site

96% of Bunny Image Optimizer sites pass INP. Cloudinary trails 20 points behind. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · all devices 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%
822.2s
96113ms
860.05
771.7s
591.2s
Akamai Image Manager 3.8%
812.2s
96116ms
850.05
771.7s
571.2s
Fastly Image Optimizer 0.6%
881.7s
93118ms
880.02
911.2s
81720ms
imgix 0.4%
872.0s
91136ms
870.05
851.5s
75819ms
Cloudinary 0.3%
792.4s
76182ms
710.14
761.8s
591.1s
Thumbor 0.1%
842.2s
95133ms
600.21
841.6s
65963ms
Uploadcare 0%
882.0s
88154ms
860.06
871.4s
82704ms
ImageKit 0%
663.1s
84147ms
800.05
682.0s
501.2s
Sirv 0%
762.5s
96111ms
800.08
662.2s
431.5s
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: 96% of its sites pass. Cloudinary trails at 76%. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · all devices 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