1
At a glance the headline numbers for Chat & messaging impact
Performance impact by chat provider.
2
Providers ranked
After min-sites filter
149
Sites in sample
Combined across all items
0.04
Best CLS (p75)
HubSpot Chat
The State of Web Vitals · October 2026 · React sites (9,570) · phone field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by CLS at p75, fastest first
| # | Provider | CLS p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | HubSpot Chat | 0.04 | 80.6% | 54 | |
| 2 | Re:amaze | 0.09 | 79.2% | 95 |
The State of Web Vitals · October 2026 · React sites (9,570) · phone field datacorewebvitals.io/state-of-cwv
3
Passing CLS per provider which group passes the CLS most often
ProviderSitesPassing CLSp75
Smartsupp 0.1% 7 0.01
Tidio 0.1% 13 0.03
HubSpot Chat 0.6% 54 0.04
Re:amaze 1% 95 0.09
tawk.to 0.3% 31 0.10
LiveChat 0.1% 12 0.13
Zendesk Chat 0.1% 10 0.15
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
The State of Web Vitals · October 2026 · React sites (9,570) · 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
Re:amaze 1%
891.5s
89121ms
790.09
981.0s
89677ms
HubSpot Chat 0.6%
643.3s
91146ms
810.04
502.7s
391.5s
tawk.to 0.3%
415.0s
100157ms
770.10
353.5s
252.3s
Tidio 0.1%
553.0s
78165ms
820.03
462.4s
361.6s
LiveChat 0.1%
563.2s
88128ms
670.13
562.9s
382.0s
Zendesk Chat 0.1%
433.0s
100146ms
570.15
432.5s
431.5s
Smartsupp 0.1%
831.9s
100124ms
830.01
831.4s
501.0s
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.
The State of Web Vitals · October 2026 · React sites (9,570) · phone field datacorewebvitals.io/state-of-cwv
Related signals Customer data platforms (6) → Font services (4) → A/B testing (12) → RUM (14) → 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.