B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
26%
26% -- email open rate increase for emails with personalized subject lines (2026)
Emails with personalized subject lines are 26% more likely to be opened.
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
26%
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.
Score breakdown
Extraction
95
Source Trust
50
Citation Chain
60
Independence
70
Methodology
45
Freshness
94
Sources (3)
Research on email personalization
Primary
Tier A
https://salesso.com/blog/avoid-gmail-promotion-tab/ ↗
Source Article
Avoid Gmail Promotion Tab: Proven Tactics That Work - Sales So
Avoid Gmail Promotion Tab: Your Complete Guide to Inbox Placement
- Protected_User_4eaaaa7b
- Views : 28,543
Table of Contents
Your emails are landing in the promotions tab. Again.
You’ve spent hours crafting the perfect message. You hit send. And then… crickets.
Here’s why: 47% of Gmail users don’t…
Also cited by
2026-07-16
2026-08-08
Original Research
Research on email personalization
· Original study ↗
Methodology
Research on email personalization
Methodology documented
Segmentation
Channelcommon_crawl
Cite this stat
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emails with personalized subject lines: 26% email open rate increase. Source: Research on email personalization (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/personalized-email-open-rate-increase
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<blockquote cite="https://lighthousedata.io/data/personalized-email-open-rate-increase" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>26%</strong> -- email open rate increase for emails with personalized subject lines<br><small>Source: Research on email personalization (2026) · <a href="https://lighthousedata.io/data/personalized-email-open-rate-increase" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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