B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
15%
15% -- recoverable tracking data for websites implementing server-side tracking (2026)
Implementing server-side tracking, Facebook CAPI, and Enhanced Conversions allows regaining 15-30% of lost tracking data.
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
15%
Unit
Percentage
Data Vintage
2026
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Gezar
Primary
Tier C
https://gezar.dk/en/blog ↗
Source Article
Blog - Marketing & Design Insights | Gezar
Blog
Guides, pricing breakdowns and trends in digital marketing and web design - from Gezar in Aarhus.
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Original Research
Gezar
· Original study ↗
Methodology
Range 15-30%; midpoint used
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
websites implementing server-side tracking: 15% recoverable tracking data. Source: Gezar (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/consent-mode-lost-data-15-30-percent
HTML Embed
<blockquote cite="https://lighthousedata.io/data/consent-mode-lost-data-15-30-percent" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>15%</strong> -- recoverable tracking data for websites implementing server-side tracking<br><small>Source: Gezar (2026) · <a href="https://lighthousedata.io/data/consent-mode-lost-data-15-30-percent" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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