Simple 3-step process to clean your email list and improve deliverability
Upload your email list via CSV, TXT, or Excel file. We support lists from 100 to 1 million+ emails. Drag and drop or select from your computer.
Our AI-powered system performs syntax, DNS, SMTP, and catch-all validation. Advanced algorithms detect disposable, role-based, and toxic emails.
Get a detailed report with validation status, confidence scores, and actionable insights. Export clean lists ready for your ESP.
Everything you need to clean and verify email lists at scale
Detects formatting errors, typos, and invalid email structures instantly.
Checks if the domain has valid mail servers configured to receive emails.
Connects to mail servers to verify if the specific mailbox exists.
95%+ accuracy identifying catch-all domains that accept all emails.
Identifies temporary/throwaway emails from services like 10MinuteMail.
Flags generic addresses like info@, support@, sales@ with lower engagement.
Process up to 10,000 emails per file. Upload multiple files in parallel for even faster results with our distributed infrastructure.
Download results as CSV, Excel, or JSON. Segment by validation status.
Get insights on list quality, domain distribution, and confidence scores.
Protect your sender reputation and improve campaign performance
High bounce rates damage your sender reputation and can get you blacklisted. Verify emails before sending to keep bounce rates under 2%.
Industry Standard: ESPs recommend keeping bounce rates below 2%. Bulk verification helps you achieve this consistently.
Clean email lists improve inbox placement rates. Gmail, Outlook, and other providers reward senders with good list hygiene.
Result: Customers report 15-30% improvement in inbox placement after cleaning their lists with HeroBounce.
Most ESPs charge based on list size or emails sent. Stop paying to send to invalid addresses and reduce your monthly costs.
ROI: If 10% of your 50K list is invalid, you're wasting $50-200/month on ESP costs alone.
Invalid emails skew your campaign metrics. Get accurate open rates, click rates, and conversion data by removing bad addresses.
Impact: Clean lists give you reliable data to optimize campaigns and calculate true ROI.
Clean purchased lists, verify signup forms, and maintain list hygiene to maximize campaign performance and deliverability.
Validate user signups in real-time, clean CRM data, and ensure onboarding emails reach new customers.
Verify prospect lists before outreach campaigns. Improve reply rates and protect your domain reputation.
Clean customer databases, validate checkout emails, and reduce cart abandonment email bounces.
Offer list cleaning as a service to clients. API access for integration into your workflow.
Validate millions of records, integrate with existing systems, and meet compliance requirements.
Processing time depends on list size. Small lists (under 10K) complete in 2-5 minutes. Larger lists (100K+) typically finish in 15-30 minutes. You'll receive an email when your list is ready.
We accept CSV, TXT, and Excel (.xlsx, .xls) files. Your file should have email addresses in a single column. We automatically detect the email column or you can specify it.
Overall validation accuracy exceeds 98%. Our catch-all detection achieves 95%+ accuracy using advanced AI algorithms. We provide confidence scores so you can make informed decisions.
Yes! Our bulk verification API allows you to upload lists programmatically and retrieve results. Perfect for integrating into your existing workflows or automating list cleaning.
Absolutely. All data is encrypted in transit (HTTPS) and at rest. We delete uploaded files after 30 days. We never share, sell, or use your email lists for any purpose other than verification.