Customer Success Stories
Real results from companies that transformed their email deliverability with Lero. From startups to enterprises, see how we help businesses achieve 97.3% validation accuracy.
Emails Validated
Avg Bounce Reduction
Total Savings
Avg Deliverability Boost
FinanceFlow
FinTech • Series A Startup
FinanceFlow was experiencing 15% email bounce rates on their customer onboarding campaigns, significantly impacting user activation and causing deliverability issues with major email providers.
Bounce Rate Reduction
Solution
Implemented Lero's API for real-time email validation during signup and ran their existing 50K customer database through our bulk validation service.
Key Metrics
Bounce Rate Before
Bounce Rate After
Deliverability Increase
Monthly Cost Savings
What They Say
"Lero transformed our email deliverability overnight. We went from 15% bounce rates to just 2.3%. The ROI was immediate - we're saving thousands on wasted sends and our email reputation has never been better."
Emails Validated
Implementation
ShopSmart
E-commerce • Mid-market
ShopSmart needed to clean their 500K subscriber list before launching a major Black Friday campaign, with concerns about hitting spam folders and damaging sender reputation.
Bounce Rate Reduction
Solution
Used Lero's bulk validation service to process their entire database and implemented real-time validation for all new newsletter signups going forward.
Key Metrics
Invalid Emails Found
Open Rate Increase
Campaign ROI
ESP Cost Reduction
What They Say
"Our Black Friday campaign was our most successful ever. Lero's validation caught 73K invalid emails we would have sent to. The campaign hit inboxes instead of spam folders, resulting in 31% higher open rates."
Emails Validated
Implementation
DevTools Pro
SaaS/Developer Tools • Enterprise
DevTools Pro needed to validate 2M+ emails for their developer newsletter while maintaining high deliverability standards and avoiding ESP throttling issues.
Bounce Rate Reduction
Solution
Integrated Lero's enterprise API with custom rate limiting and implemented batch processing for their massive email database while maintaining real-time validation for new signups.
Key Metrics
Emails Processed
Processing Speed
Final Deliverability
Annual Savings
What They Say
"Lero handled our 2M+ email validation seamlessly. Their enterprise API scaled perfectly with our infrastructure. We're now confidently sending to our entire developer community with 98.1% deliverability."
Emails Validated
Implementation
Ready to Join Our Success Stories?
Start validating your emails today and see the same results as our customers. Enterprise accuracy at startup-friendly pricing.