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
0.07
Best CLS (p75)
PostHog Replay
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by CLS at p75, fastest first
| # | Provider | CLS p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | PostHog Replay | 0.07 | 84.5% | 283 | |
| 2 | Lucky Orange | 0.07 | 79.5% | 78 | |
| 3 | Smartlook | 0.10 | 75.8% | 162 | |
| 4 | Microsoft Clarity | 0.10 | 76.0% | 8,491 | |
| 5 | Crazy Egg | 0.11 | 74.1% | 185 | |
| 6 | Mouseflow | 0.11 | 71.4% | 304 | |
| 7 | Contentsquare | 0.11 | 74.4% | 592 | |
| 8 | Hotjar | 0.11 | 75.0% | 4,467 | |
| 9 | FullStory | 0.20 | 62.4% | 272 |
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop field datacorewebvitals.io/state-of-cwv
3
Passing CLS per provider which group passes the CLS most often
ProviderSitesPassing CLSp75
PostHog Replay 0.1% 283 0.07
Lucky Orange 0% 78 0.07
Microsoft Clarity 4.5% 8,491 0.10
Smartlook 0.1% 162 0.10
Hotjar 2.3% 4,467 0.11
Contentsquare 0.3% 592 0.11
Crazy Egg 0.1% 185 0.11
Inspectlet 0% 39 0.12
Mouseflow 0.2% 304 0.11
LogRocket 0% 28 0.13
FullStory 0.1% 272 0.20
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
85% of PostHog Replay sites pass CLS. FullStory trails 23 points behind, leaving 38% of its sites failing. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop 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%
653.0s
88102ms
620.20
741.8s
561.1s
Crazy Egg 0.1%
832.3s
9981ms
740.11
791.7s
591.2s
LogRocket 0%
682.7s
100103ms
680.13
742.0s
68862ms
Microsoft Clarity 4.5%
852.1s
9881ms
760.10
811.6s
601.2s
Hotjar 2.3%
852.1s
9978ms
750.11
791.6s
581.2s
Lucky Orange 0%
822.0s
10067ms
800.07
801.7s
79727ms
PostHog Replay 0.1%
822.1s
9990ms
850.07
821.6s
621.0s
Contentsquare 0.3%
792.4s
9797ms
740.11
791.7s
621.1s
Mouseflow 0.2%
872.1s
9982ms
710.11
821.6s
631.1s
Smartlook 0.1%
822.2s
9870ms
760.10
771.7s
421.3s
Inspectlet 0%
861.8s
9572ms
730.12
821.4s
671.1s
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.
PostHog Replay leads on CLS: 85% of its sites pass. FullStory trails at 62%. computed
The State of Web Vitals · Q2 2026 · 189,915 sites · desktop 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.