B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
3%
3% -- spam placement rate for Smartlead (2026)
Smartlead had a 3.0% spam placement rate measured via GlockApps during a 60-day matched-campaign test across 30 inboxes.
Attribution:
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Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
3%
Unit
Percentage
Data Vintage
2026
Entity
Sample Size
30
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
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Puzzle Inbox
Primary
Tier A
https://puzzleinbox.com/compare/smartlead-vs-woodpecker ↗
Source Article
Smartlead vs Woodpecker: Which Cold Email Platform Fits Your Use Case? (2026)
Smartlead vs Woodpecker: Which Cold Email Platform Fits Your Use Case?
Smartlead is built for agencies. Woodpecker was built for solo senders. We compare both on pricing, features, and real-world performance.
Two Very Different Products Targeting the Same Market
Smartlead and Woodpecker are both col…
Original Research
Puzzle Inbox
· Original study ↗
Methodology
Measured via GlockApps during first-party 60-day matched-campaign test
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Smartlead: 3% spam placement rate. Source: Puzzle Inbox (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/smartlead-spam-placement-2026
HTML Embed
<blockquote cite="https://lighthousedata.io/data/smartlead-spam-placement-2026" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>3%</strong> -- spam placement rate for Smartlead<br><small>Source: Puzzle Inbox (2026) · <a href="https://lighthousedata.io/data/smartlead-spam-placement-2026" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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