C
Evidence Grade C
Graded
under review
Use with Hedging
Dated
46%
46% -- email open rate for cold emails with personalized subject lines (2022)
Attribution:
View source
Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
46%
Unit
Percentage
Data Vintage
2022
Entity
Evidence Quality
C
Moderate quality evidence
Useful directional data with some methodological gaps. Treat as indicative rather than definitive -- corroborate before citing in formal research.
Score breakdown
Extraction
95
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Sources (2)
Alex Berman
Primary
Tier A
https://alexberman.com/best-subject-line-for-a-cold-email ↗
Source Article
Best Subject Line for a Cold Email (With Examples)
Your Subject Line Is the Only Thing That Matters (At First)
I've sent tens of thousands of cold emails. Written campaigns for agencies, SaaS companies, and solo consultants across every industry you can name. And the one thing that separates a 40% open rate from a 9% one almost always comes down to …
Also cited by
2026-08-30
Original Research
Alex Berman
· Original study ↗
Methodology
Personalized subject lines outperform generic ones consistently, hitting a 46% open rate versus 35% for generic ones.
Segmentation
Industrymarketing
Cite this stat
Suggested hedging: According to limited, single-source data, based on claims without stated methodology, with unverified sample sizes...
Plain Text
cold emails with personalized subject lines: 46% email open rate. Source: Alex Berman (2022). Via Lighthouse Intelligence -- https://lighthousedata.io/data/personalized-subject-line-open-rates
HTML Embed
<blockquote cite="https://lighthousedata.io/data/personalized-subject-line-open-rates" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>46%</strong> -- email open rate for cold emails with personalized subject lines<br><small>Source: Alex Berman (2022) · <a href="https://lighthousedata.io/data/personalized-subject-line-open-rates" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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