B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
20%
20% -- customer retention increase for e-commerce brand (2026)
An e-commerce brand achieved a 20% increase in customer retention after running a personalized direct postcard mailing campaign with LettrLabs.
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
20%
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
95
Source Trust
50
Citation Chain
60
Independence
30
Methodology
45
Freshness
81
Source
LettrLabs
Primary
Tier A
https://www.lettrlabs.com/post/direct-postcard-mailing ↗
Source Article
Discover the effectiveness of direct postcard mailing for your marketing strategy.
The Hidden Power of Direct Postcard Mailing
Direct postcard mailing is not just an old-school tactic; it’s a proven powerhouse in the modern marketing arsenal. Businesses across various industries are rediscovering the unmatched effectiveness of personalized, tangible mail in capturing attention and…
Original Research
LettrLabs
· Original study ↗
Methodology
Case study from LettrLabs
Methodology documented
Segmentation
Channelcommon_crawl
Cite this stat
Plain Text
e-commerce brand: 20% customer retention increase. Source: LettrLabs (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/ecommerce-customer-retention-increase-2026
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<blockquote cite="https://lighthousedata.io/data/ecommerce-customer-retention-increase-2026" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>20%</strong> -- customer retention increase for e-commerce brand<br><small>Source: LettrLabs (2026) · <a href="https://lighthousedata.io/data/ecommerce-customer-retention-increase-2026" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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