AI-Builder Audit · Q2 2026 · n=93

AI-Built Web Index — a technical snapshot (2026)

In a 2026 audit of 93 production websites built with AI builders (Wix, Lovable, Gamma), DevNova found 75% lack structured data (JSON-LD) and a median mobile LCP of 6.6s (70% rated "poor"), while the same sites averaged 96/100 on Lighthouse's basic SEO check.

75%
no JSON-LD schema
6.6s
median mobile LCP
66
median Performance
96
avg Lighthouse SEO (the paradox)
Where AI builders hold up

Visual stability is fine: CLS is "good" on 93% of sites, average accessibility 90/100. The weakness is speed and machine-readability, not layout.

Sample by builder
Gamma: 20Lovable: 31custom: 4Wix: 37Mobirise: 1
Methodology

Measured 2026-06-02 via Google PageSpeed Insights v5 (mobile, Lighthouse lab) + HTML parsing (JSON-LD, canonical, meta description, H1, viewport). Live production sites. Figures are measured, not estimated.

Cite this data

DevNova Web Index 2026 (CC-BY 4.0), devnova.eu/devnova-index.

Download raw data (CSV) ↓
Live index

Baseline pilot (June 2026). We expand the sample over time. Want a specific site tested? Send the URL.

Related
Case: a site rebuilt from an AI builder to custom code (PageSpeed 54 → 99)→Web development→
AI-Built Web Index — a technical snapshot (2026) — DevNova Index