The State of Web Vitals

Session recording impact

Session-recording tools ranked by performance impact.

Field data PhoneDesktopAll Scope All sites Q2 2026 edition · Desktop field outcomes
Metric LCP INP CLS
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
14,812
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 0.08 79.5%
78
3 Smartlook 0.10 75.8%
162
4 Hotjar 0.10 75.0%
4,462
5 Microsoft Clarity 0.10 76.0%
8,476
6 Crazy Egg 0.11 74.1%
185
7 Mouseflow 0.11 71.4%
304
8 Contentsquare 0.11 74.6%
591
9 FullStory 0.21 62.0%
271
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 85% 0.07
Lucky Orange 0% 78 80% 0.08
Microsoft Clarity 4.5% 8,476 76% 0.10
Smartlook 0.1% 162 76% 0.10
Hotjar 2.3% 4,462 75% 0.10
Contentsquare 0.3% 591 75% 0.11
Crazy Egg 0.1% 185 74% 0.11
Inspectlet 0% 39 73% 0.11
Mouseflow 0.2% 304 71% 0.11
LogRocket 0% 28 68% 0.13
FullStory 0.1% 271 62% 0.21
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
Microsoft Clarity 4.5%
852.1s
9881ms
760.10
811.6s
601.2s
Hotjar 2.3%
852.1s
9978ms
750.10
791.6s
581.2s
Contentsquare 0.3%
792.4s
9797ms
750.11
791.7s
621.1s
Mouseflow 0.2%
872.1s
10082ms
710.11
821.6s
631.1s
PostHog Replay 0.1%
822.1s
9990ms
850.07
821.6s
621.0s
FullStory 0.1%
643.0s
87103ms
620.21
741.8s
571.1s
Crazy Egg 0.1%
832.3s
9981ms
740.11
791.7s
591.2s
Smartlook 0.1%
822.2s
9869ms
760.10
771.7s
421.3s
Lucky Orange 0%
822.0s
10067ms
800.08
801.7s
79724ms
Inspectlet 0%
861.8s
9572ms
730.11
821.3s
671.1s
LogRocket 0%
682.7s
100102ms
680.13
741.9s
68853ms
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 (5) → JS libraries (23) → Scheduling (3) → Push notifications (5) → Chrome field data from 189,915 sites, representing millions of real page loads · How we measured