C
Evidence Grade C
Graded
accuracy verified by the review judge
Use with Hedging
Dated
21.9%
21.9% -- email open rate for E-mail marketers (Q3 2009)
Average email open rate in Q3 2009 was 21.9% across more than 6 billion emails sent by approximately 200 Epsilon clients.
- An open is recorded when the receiving computer calls for graphics from the sending machine, which may not capture all opened emails.
Attribution:
View source
Lighthouse Research Team
Last verified:
·
How we verify data →
Source verified
Evidence graded
Value
21.9%
Unit
Percentage
Data Vintage
Q3 2009
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
50
Citation Chain
20
Independence
30
Methodology
45
Freshness
86
Sources (2)
Epsilon
Primary
Tier A
https://www.chiefmarketer.com/open-rates-rise-epsilon/ ↗
Source Article
Open Rates Rise: Epsilon - Chief Marketer
E-mail marketers’ average click and open rates in the third quarter of 2009 edged up over the same period in 2008, according to a recent study by Epsilon.
Average open rates — an “open” is recorded when the receiving computer calls for graphics from the sending machine — in the study of more than 6 …
Also cited by
AWD (Australian Web Designs)
https://web.archive.org/web/20180910140924id_/http://www.awd.com.au/blog/christm…
2026-09-22
Original Research
Epsilon
· Original study ↗
Methodology
Study by Epsilon
Methodology documented
Segmentation
Channelcommon_crawl
Cite this stat
Suggested hedging: According to limited, single-source data, with unverified sample sizes...
Plain Text
E-mail marketers: 21.9% email open rate. Source: Epsilon (Q3 2009). Via Lighthouse Intelligence -- https://lighthousedata.io/data/average-open-rate-2009-q3
HTML Embed
<blockquote cite="https://lighthousedata.io/data/average-open-rate-2009-q3" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>21.9%</strong> -- email open rate for E-mail marketers<br><small>Source: Epsilon (Q3 2009) · <a href="https://lighthousedata.io/data/average-open-rate-2009-q3" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
Share
Related Statistics
Use this data in your work
Copy the citation, embed the widget, or explore thousands more verified marketing statistics -- all free.