How We Helped a SaaS Startup Drop from 7% Bounce to 0.8%
Even the best cold campaigns fail when deliverability breaks. In this mini case study, CapLeads shares how a SaaS startup went from struggling with a 7% bounce rate to achieving just 0.8% — by cleaning, validating, and restructuring their outreach data. It’s a short but powerful story of how verified leads can completely turn around campaign performance and restore sender reputation.
CASE STUDIESDELIVERABILITYB2B DATA QUALITYSAAS OUTREACH
CapLeads Team
10/25/20252 min read


How a SaaS Startup Dropped from 7% Bounce to 0.8% After Switching to CapLeads Data
A fast-growing SaaS startup had all the right systems in place — automated warm-ups, bounce alerts, and a solid sending strategy. But even with everything tuned, their cold outreach campaigns were underperforming.
Their bounce rate hovered around 7%, and deliverability kept slipping. The cause wasn’t poor copy or a bad setup — it was something deeper: data decay.
Step 1: The Audit
Over the years, their contact lists had grown large and fragmented. Some segments dated back more than a year and came from multiple providers. Many addresses were technically valid but no longer active — old roles, rebranded companies, or domains that had gone dark.
When the team switched to a CapLeads-verified dataset, the difference was immediate. Our validation cycle filtered out inactive, duplicate, and high-risk addresses while enriching the valid ones with current company data. From 22,000 contacts, about 2,400 were retired — leaving a clean, verified list of 19,600 active decision-makers ready for outreach.
Step 2: The Relaunch
With the new dataset in place, they relaunched using the exact same cadence, copy, and domains. Nothing else changed — just the quality of the list.
Within weeks, performance rebounded:
Week 1: 3.2% bounce
Week 2: 1.7% bounce
Week 3: 0.8% bounce
Open rates nearly doubled, and inbox placement normalized across Gmail and Outlook. Their existing system finally performed the way it was meant to.
Step 3: The Ripple Effect
Better data didn’t just stop bounces — it restored trust signals across their entire outreach ecosystem.
Bounce Rate: 0.8%
Open Rate: 47%
Reply Rate: 9.6%
By removing stale contacts, they rebuilt domain reputation and unlocked performance that their tools alone couldn’t deliver.
The Takeaway
Even the best outreach stack can’t compensate for aging data. Over time, addresses decay, roles shift, and domains vanish — quietly eroding results until campaigns stall.
Switching to CapLeads-validated data turned a failing 7% bounce into a 0.8% success story. The system, the tools, and the copy all stayed the same — only the data changed.
At CapLeads, every dataset is refreshed, verified, and enriched to keep your outreach running at full strength — because great campaigns don’t start with sending; they start with who you’re sending to.
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CapLeads provides verified B2B datasets with accurate contacts and direct phone numbers. Our data helps startups and sales teams reach C-level executives in FinTech, SaaS, Consulting, and other industries.