The State of Web Vitals

Image CDNs impact

Performance impact by image_cdn provider.

Field data PhoneDesktopAll Scope All sites Q2 2026 edition · Phone 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
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%
17,146
3 Akamai Image Manager 136ms 92.4%
7,230
4 Fastly Image Optimizer 137ms 90.8%
1,139
5 Thumbor 151ms 88.5%
188
6 Imgix 157ms 87.0%
805
7 ImageKit 170ms 79.5%
78
8 Uploadcare 173ms 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 95% 124ms
Bunny Image Optimizer 9% 17,146 93% 133ms
Akamai Image Manager 3.8% 7,230 92% 136ms
Fastly Image Optimizer 0.6% 1,139 91% 137ms
Thumbor 0.1% 188 89% 151ms
imgix 0.4% 805 87% 157ms
Uploadcare 0% 92 86% 173ms
ImageKit 0% 78 80% 170ms
Cloudinary 0.3% 512 70% 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
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.

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 (5) → Font services (4) → Personalization (5) → CDN (15) → Chrome field data from 189,915 sites, representing millions of real page loads · How we measured