B Evidence Grade B Graded accuracy verified by the review judge Safe to Cite Dated

46%

46% -- email optin conversion rate lift for B2B/B2C company website (Email Optimization Shop client) (2021)

Name: Email Optin Conversion Rate Lift Statistics
Creator: Lighthouse Intelligence
Published: 2026-09-18

2021 · n=1 · Email Optimization Shop (Jeanne Jennings)

Moving the email opt-in call-to-action from the website footer to the header increased the average email opt-in conversion rate by 46%.

Single client case study (n=1)
Not a true A/B split test; before/after comparison over 7 days

Cite this stat Share How we verify

Attribution: Email Optimization Shop (Jeanne Jennings) View source

Lighthouse Research Team

Last verified: 2026-09-18 · How we verify data →

Source verified Evidence graded

Value

46%

Unit

Percentage

Data Vintage

2021

Entity

B2B/B2C company website (Email Optimization Shop client)

Sample Size

Evidence Quality

Strong, reliable evidence

Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.

61/100 confidence

Single source - not yet corroborated

Score breakdown

Extraction

Source Trust

Citation Chain

Independence

Methodology

Freshness

Source

Email Optimization Shop (Jeanne Jennings) Primary Tier B

https://emailopshop.com/case-study-46-increase-in-email-list-growth/ ↗

Confidence: 51/100 Vintage: 2021 Channel: Deep Crawl

Source Article

Want a 46% increase in email list growth? [Case Study] - Email Optimization Shop by Jeanne Jennings

A few years ago, I noticed a trend in website architecture – putting email opt-in calls-to-action (CTAs) in the footer. I don’t mean in the footer and elsewhere throughout the site – I mean in the footer and nowhere else. When I asked, they told me it’s a ‘best practice.’ Well, maybe. But not if you…

Original Research

Email Optimization Shop (Jeanne Jennings) · Original study ↗

Methodology

Single-client before/after comparison: 7 days before vs. 7 days after moving the email opt-in CTA from the website footer to the header. New email subscribers from 39,247 new (non-returning) visitors rose from 1,365 to 1,993. Data collected prior to original publication (Jan 19, 2021); post updated Jan 28, 2025. n=1 anonymous client; author cautions results may vary by site.

Methodology documented

Segmentation

Industrymarketing

Cite this stat

Plain Text

B2B/B2C company website (Email Optimization Shop client): 46% email optin conversion rate lift. Source: Email Optimization Shop (Jeanne Jennings) (2021). Via Lighthouse Intelligence -- https://lighthousedata.io/data/email-cta-header-46pct-conversion-lift

HTML Embed

<blockquote cite="https://lighthousedata.io/data/email-cta-header-46pct-conversion-lift" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>46%</strong> -- email optin conversion rate lift for B2B/B2C company website (Email Optimization Shop client)<br><small>Source: Email Optimization Shop (Jeanne Jennings) (2021) · <a href="https://lighthousedata.io/data/email-cta-header-46pct-conversion-lift" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>

Share on X Share on LinkedIn

Use this data in your work

Copy the citation, embed the widget, or explore thousands more verified marketing statistics -- all free.

Copy citation Explore similar stats →