B
Evidence Grade B
Graded
under review
Safe to Cite
Current
66%
66% -- internal email open rate for employees (2026)
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
66%
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
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
PoliteMail
Primary
Tier B
https://www.brevo.com/blog/internal-newsletter/ ↗
Source Article
Internal Newsletter Guide: How to Create One Employees Actually Read | Brevo
Most companies communicate with their customers through email better than they communicate with their own employees. The internal newsletter is one of the simplest ways to fix that, and one of the most consistently underused tools in an HR or communications team's toolkit.
This guide covers everythi…
Original Research
PoliteMail
· Original study ↗
Methodology
PoliteMail study
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
employees: 66% internal email open rate. Source: PoliteMail (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/politemail-internal-email-open-rate
HTML Embed
<blockquote cite="https://lighthousedata.io/data/politemail-internal-email-open-rate" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>66%</strong> -- internal email open rate for employees<br><small>Source: PoliteMail (2026) · <a href="https://lighthousedata.io/data/politemail-internal-email-open-rate" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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