Session recording impact React sites
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.
2
Providers ranked
After min-sites filter
389
Sites in sample
Combined across all items
0.06
Best CLS (p75)
Hotjar
The State of Web Vitals · October 2026 · React sites (9,570) · all devices field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by CLS at p75, fastest first
| # | Provider | CLS p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Hotjar | 0.06 | 84.6% | 146 | |
| 2 | Microsoft Clarity | 0.06 | 82.2% | 243 |
The State of Web Vitals · October 2026 · React sites (9,570) · all devices field datacorewebvitals.io/state-of-cwv
3
Passing CLS per provider which group passes the CLS most often
ProviderSitesPassing CLSp75
Mouseflow 0.1% 9 0.04
PostHog Replay 0.1% 8 0.02
Hotjar 1.5% 146 0.06
Contentsquare 0.4% 35 0.08
Microsoft Clarity 2.5% 243 0.06
Crazy Egg 0.1% 6 0.03
FullStory 0.1% 6 0.22
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
No provider stands out: pass rates sit between 82% and 85%. computed
The State of Web Vitals · October 2026 · React sites (9,570) · 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
Microsoft Clarity 2.5%
692.8s
94139ms
820.06
592.3s
321.9s
Hotjar 1.5%
712.8s
93138ms
850.06
682.3s
491.4s
Contentsquare 0.4%
672.8s
97153ms
820.08
681.9s
441.3s
Mouseflow 0.1%
891.8s
100147ms
1000.04
781.4s
78690ms
PostHog Replay 0.1%
752.3s
88140ms
1000.02
751.8s
381.3s
Crazy Egg 0.1%
752.5s
10092ms
800.03
401.9s
251.8s
FullStory 0.1%
173.6s
20415ms
170.22
831.7s
83730ms
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.
Hotjar leads on CLS: 85% of its sites pass. Microsoft Clarity trails at 82%. computed
The State of Web Vitals · October 2026 · React sites (9,570) · all devices field datacorewebvitals.io/state-of-cwv
Related signals Search (6) → JS libraries (26) → Scheduling (3) → Push notifications (5) → 210,902 crawled sites with Chrome field data, representing millions of real page loads · How we measured
210,902 crawled sites with Chrome field data, representing millions of real page loads. How we measured.