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.
8
Providers ranked
After min-sites filter
7,824
Sites in sample
Combined across all items
0.02
Best CLS (p75)
Smartlook
The State of Web Vitals · Q1 2026 · 94,910 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 | 0.02 | 92.2% | 88 | |
| 2 | Mouseflow | 0.04 | 87.6% | 169 | |
| 3 | Crazy Egg | 0.04 | 83.3% | 93 | |
| 4 | Hotjar | 0.04 | 86.1% | 2,379 | |
| 5 | Microsoft Clarity | 0.04 | 84.9% | 4,465 | |
| 6 | FullStory | 0.05 | 77.5% | 146 | |
| 7 | Contentsquare | 0.06 | 84.1% | 318 | |
| 8 | PostHog Replay | 0.07 | 83.9% | 166 |
The State of Web Vitals · Q1 2026 · 94,910 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% 88 0.02
Mouseflow 0.2% 169 0.04
Hotjar 2.5% 2,379 0.04
Microsoft Clarity 4.7% 4,465 0.04
Contentsquare 0.3% 318 0.06
PostHog Replay 0.2% 166 0.07
Crazy Egg 0.1% 93 0.04
Lucky Orange 0% 38 0.06
Inspectlet 0% 15 0.03
FullStory 0.2% 146 0.05
LogRocket 0% 16 0.05
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
88% of Mouseflow sites pass CLS. FullStory trails 10 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
Microsoft Clarity 4.7%
782.4s
87165ms
850.04
731.9s
541.2s
Hotjar 2.5%
772.4s
89155ms
860.04
711.9s
521.3s
Contentsquare 0.3%
722.6s
73204ms
840.06
711.9s
621.1s
Mouseflow 0.2%
782.3s
88160ms
880.04
771.7s
621.0s
PostHog Replay 0.2%
732.6s
80177ms
840.07
622.2s
381.4s
FullStory 0.2%
683.0s
85172ms
780.05
761.7s
611.0s
Crazy Egg 0.1%
712.6s
83161ms
830.04
741.9s
461.3s
Smartlook 0.1%
752.5s
84161ms
920.02
612.3s
441.4s
Lucky Orange 0%
852.0s
95127ms
810.06
811.6s
76737ms
LogRocket 0%
752.4s
91176ms
750.05
671.8s
67931ms
Inspectlet 0%
1001.7s
89142ms
800.03
901.3s
56872ms
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.
Mouseflow leads on CLS: 88% of its sites pass. FullStory trails at 78%. computed
The State of Web Vitals · Q1 2026 · 94,910 sites · phone field datacorewebvitals.io/state-of-cwv
Related signals Search (4) → JS libraries (22) → Scheduling (3) → Push notifications (4) → 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.