C
Evidence Grade C
Graded
accuracy verified by the review judge
Use with Hedging
Dated
5%
5% -- email client market share for Yahoo! Mail (2020-09)
Yahoo! Mail accounted for 5% of worldwide email client market share based on 870 million email opens as of September 1, 2020.
- Data for some email clients might be over- or under-represented due to automatic image blocking required to detect opens.
Attribution:
View source
Lighthouse Research Team
Last verified:
·
How we verify data →
Source verified
Evidence graded
Value
5%
Unit
Percentage
Data Vintage
2020-09
Entity
Sample Size
870,000,000
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.
Single source - not yet corroborated
Score breakdown
Extraction
95
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Sources (5)
emailclientmarketshare.com
Primary
Tier A
http://emailclientmarketshare.com/ ↗
Source Article
Email Client Market Share
#1 Apple iPhone 35% +5.32
#2 Gmail 27% -5.23
#3 Apple Mail 11% +0.36
#4 Outlook 10% -0.3
#5 Yahoo! Mail 5% +0.41
#6 Samsung Mail 2% -0.03
#7 Apple iPad 2% -0.05
#8 Google Android 1% -0.1
#9 Outlook.com 1% -0.06
#10 Windows Live Mail 0% -0.01
Email client market share
Email client usage worldwide, co…
Also cited by
emailclientmarketshare.com
https://web.archive.org/web/20210707073824id_/https://emailclientmarketshare.com…
2026-08-30
emailclientmarketshare.com
https://web.archive.org/web/20200423010809id_/http://emailclientmarketshare.com/…
2026-08-29
emailclientmarketshare.com
https://web.archive.org/web/20200213200850id_/https://emailclientmarketshare.com…
2026-09-01
emailclientmarketshare.com
https://web.archive.org/web/20171222074227id_/http://emailclientmarketshare.com/
2026-08-31
Original Research
emailclientmarketshare.com
· Original study ↗
Methodology
Collected from 870 million email opens worldwide by Litmus Email Analytics.
Trend Over Time
| Period | Value | Change |
|---|---|---|
| 2012-02 | 13% | |
| 2013-01 | 7% | -46.2% |
| 2014-01 | 5% | -28.6% |
| 2014-02 | 5% | 0% |
| 2014-03 | 5% | 0% |
| 2014-10 | 4% | -20.0% |
| 2015 | 4% | 0% |
| 2015-06 | 4% | 0% |
| 2015-07 | 4% | 0% |
| 2016 | 3% | -25.0% |
| 2017-05 | 2% | -33.3% |
| 2017-12 | 2% | 0% |
| 2018-09 | 6% | +200.0% |
| 2018-10 | 6% | 0% |
| 2019 | 6% | 0% |
| 2019-11 | 6% | 0% |
| 2020 | 4% | -33.3% |
| 2020-03 | 3% | -25.0% |
| 2020-08 | 5% | +66.7% |
| 2020-09 (current) | 5% | 0% |
| 2020-11 | 5% | 0% |
| 2020-12 | 5% | 0% |
| 2021-03 | 5% | 0% |
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
Yahoo! Mail: 5% email client market share. Source: emailclientmarketshare.com (2020-09). Via Lighthouse Intelligence -- https://lighthousedata.io/data/yahoo-mail-email-client-market-share-september-2020
HTML Embed
<blockquote cite="https://lighthousedata.io/data/yahoo-mail-email-client-market-share-september-2020" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>5%</strong> -- email client market share for Yahoo! Mail<br><small>Source: emailclientmarketshare.com (2020-09) · <a href="https://lighthousedata.io/data/yahoo-mail-email-client-market-share-september-2020" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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