21%
21% -- click through rate lift for Plain text emails vs HTML/CSS styled emails (B2B email marketing) (2025)
In B2B email marketing, text-focused plain emails had a 21% higher click-through rate (CTR) compared to HTML/CSS styled emails.
- Data presented in Relate webinar; detailed methodology, sample size, and study dates not specified in text.
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Relative performance of text-focused plain emails vs HTML/CSS styled emails, as shared in Relate's 'B2B Email Marketing 101' webinar; the article does not specify whether the 21% is a relative lift or a percentage-point difference, nor the sample size or exact study period; article publication date not stated, so the latest year referenced (2025) is used.
<blockquote cite="https://lighthousedata.io/data/plain-text-email-ctr-lift-vs-html" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>21%</strong> -- click through rate lift for Plain text emails vs HTML/CSS styled emails (B2B email marketing)<br><small>Source: Relate (2025) · <a href="https://lighthousedata.io/data/plain-text-email-ctr-lift-vs-html" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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