B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
5.3%
5.3% -- click to open rate for average click-to-open rate (2026)
The average click-to-open rate (CTOR) is 5.3%.
- Not inflated by Apple Mail Privacy Protection (MPP)
Attribution:
View source
Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
5.3%
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
95
Source Trust
50
Citation Chain
20
Independence
30
Methodology
45
Freshness
92
Source
HubSpot
Primary
Tier A
https://prospeo.io/s/short-email-subject-lines ↗
Source Article
Short Email Subject Lines: Data-Backed Guide (2026)
Short Email Subject Lines: The Data-Backed Guide (2026)
You've spent 45 minutes crafting the perfect cold email. Then you slap a 12-word subject line on it and watch it get truncated on mobile - the only thing standing between your email and the trash folder just lost half its message.
A Belkins stu…
Original Research
HubSpot
· Original study ↗
Methodology
Average CTOR metric
Segmentation
Industrymarketing
Channelrss_feed
Cite this stat
Plain Text
average click-to-open rate: 5.3% click to open rate. Source: HubSpot (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/click-to-open-rate-average
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<blockquote cite="https://lighthousedata.io/data/click-to-open-rate-average" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>5.3%</strong> -- click to open rate for average click-to-open rate<br><small>Source: HubSpot (2026) · <a href="https://lighthousedata.io/data/click-to-open-rate-average" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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