Session recording impact
Session-recording tools ranked by performance impact.
1
At a glance the headline numbers for Session recording impact
Session-recording tools ranked by performance impact.
9
Providers ranked
After min-sites filter
14,834
Sites in sample
Combined across all items
0.03
Best CLS (p75)
Smartlook
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by CLS at p75, fastest first
| # | Provider | CLS p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Smartlook | 0.03 | 90.3% | 162 | |
| 2 | Lucky Orange | 0.04 | 79.6% | 78 | |
| 3 | Mouseflow | 0.04 | 86.7% | 304 | |
| 4 | Crazy Egg | 0.04 | 82.8% | 185 | |
| 5 | Hotjar | 0.04 | 85.5% | 4,467 | |
| 6 | Microsoft Clarity | 0.04 | 85.1% | 8,491 | |
| 7 | PostHog Replay | 0.06 | 87.4% | 283 | |
| 8 | FullStory | 0.08 | 76.5% | 272 | |
| 9 | Contentsquare | 0.08 | 80.0% | 592 |
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
3
Passing CLS per provider which group passes the CLS most often
ProviderSitesPassing CLSp75
Smartlook 0.1% 162 0.03
PostHog Replay 0.1% 283 0.06
Mouseflow 0.2% 304 0.04
Hotjar 2.3% 4,467 0.04
Microsoft Clarity 4.5% 8,491 0.04
Crazy Egg 0.1% 185 0.04
Contentsquare 0.3% 592 0.08
Lucky Orange 0% 78 0.04
FullStory 0.1% 272 0.08
Inspectlet 0% 39 0.04
LogRocket 0% 28 0.42
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good CLS (0.1 at p75) · one value per site
90% of Smartlook sites pass CLS. FullStory trails 14 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
FullStory 0.1%
673.0s
81170ms
760.08
741.9s
551.1s
Crazy Egg 0.1%
712.6s
86167ms
830.04
682.0s
481.3s
LogRocket 0%
593.1s
75190ms
610.42
502.0s
671.1s
Microsoft Clarity 4.5%
782.4s
88162ms
850.04
721.9s
541.2s
Hotjar 2.3%
762.4s
88156ms
850.04
692.0s
511.3s
Lucky Orange 0%
802.3s
90137ms
800.04
801.6s
78705ms
PostHog Replay 0.1%
772.5s
82174ms
870.06
672.0s
421.3s
Contentsquare 0.3%
692.7s
74202ms
800.08
682.0s
571.2s
Mouseflow 0.2%
752.5s
87162ms
870.04
731.8s
591.2s
Smartlook 0.1%
792.4s
85159ms
900.03
642.3s
471.3s
Inspectlet 0%
882.2s
96137ms
760.04
681.9s
381.3s
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.
Smartlook leads on CLS: 90% of its sites pass. FullStory trails at 76%. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
Related signals Search (6) → JS libraries (25) → Scheduling (3) → Push notifications (5) → 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.