B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
28%
28% -- conversion rate lift from email cta button for email marketing (2026)
Conversion rates increase by 28% when emails contain a CTA button.
- Secondary blog post with unreferenced source citation
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
28%
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
incendium.ai
Primary
Tier C
https://incendium.ai/blog/an-introduction-to-cro-what-a-good-conversion-rate-looks-like-how-you-can-… ↗
Source Article
An introduction to CRO: What It Is & What Good Looks Like
Despite often getting decent levels of traffic directed to their sites, many marketers struggle with converting visits into sales. In fact, only one-fifth (22%) of companies are happy with their conversion rates, and factors such as slow load speed, lack of personalisation and missing CTAs are just …
Original Research
incendium.ai
· Original study ↗
Methodology
Unsourced claim in blog; original study not identified
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
email marketing: 28% conversion rate lift from email cta button. Source: incendium.ai (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/email-cta-conversion-lift
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<blockquote cite="https://lighthousedata.io/data/email-cta-conversion-lift" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>28%</strong> -- conversion rate lift from email cta button for email marketing<br><small>Source: incendium.ai (2026) · <a href="https://lighthousedata.io/data/email-cta-conversion-lift" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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