B
Evidence Grade B
Graded
under review
Safe to Cite
Current
35%
35% -- bounce rate reduction for Warmy customers (2026)
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
35%
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
50
Source Trust
50
Citation Chain
20
Independence
30
Methodology
30
Freshness
92
Source
Warmy
Primary
Tier C
https://blog.warmy.io/blog/why-warmy-is-the-best-gmass-alternative-for-warming-up-email/ ↗
Source Article
: Best GMass Alternative for Email Warmup in 2026
GMass, a popular Gmail-based email outreach tool, shut down its email warmup feature in January 2023 after Google threatened to revoke API access for any tool continuing to offer warmup via the Gmail API. For the more than 1.5 million accounts that relied on GMass’s built-in warmup, this left a crit…
Original Research
Warmy
· Original study ↗
Segmentation
Industrymarketing
Channelemail
Cite this stat
Plain Text
Warmy customers: 35% bounce rate reduction. Source: Warmy (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/reduction-in-bounce-rates
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<blockquote cite="https://lighthousedata.io/data/reduction-in-bounce-rates" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>35%</strong> -- bounce rate reduction for Warmy customers<br><small>Source: Warmy (2026) · <a href="https://lighthousedata.io/data/reduction-in-bounce-rates" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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