Verify Every Email. Trust Your List.
99.2% accuracy multi-layer verification engine. Syntax, domain, MX records, SMTP, catch-all detection, and disposable email filtering. Reduce your bounce rate by 95%.
Try It Right Now
Enter any email address and watch our multi-layer verification engine analyze it in real time.
How The Filter Works
Every email passes through four verification layers before reaching your list. Each layer catches what the previous one missed.
Syntax Analysis
Validates email format and structure against RFC 5322 standards. Catches typos, missing symbols, invalid characters, and malformed local parts before any network requests are made.
Domain & MX Lookup
Verifies the domain exists, resolves DNS, and confirms valid MX (Mail Exchange) records are configured. Ensures the domain is actively receiving email — not parked or expired.
SMTP Verification
Opens a real SMTP connection to the mail server and simulates a delivery attempt. Confirms the specific mailbox exists without actually sending an email. The most definitive check.
Intelligence Layer
Advanced detection of catch-all domains, disposable/temporary email services, role-based addresses (info@, admin@), known spam traps, and honeypot patterns. Powered by continuously updated threat intelligence.
Everything You Need to Clean Your List
From single email checks to processing millions in bulk — we've got you covered.
Real-time API
Verify emails instantly via our REST API. Single-call verification with comprehensive JSON results. Integrate in minutes with any language or platform.
Bulk Upload
Upload CSV files with millions of emails. Our distributed engine processes them in parallel with real-time progress tracking and downloadable results.
Catch-All Detection
Identify accept-all domains that accept any address. Our algorithms distinguish real mailboxes from catch-all configurations with high confidence.
Disposable Detection
Block temporary email services like Guerrilla Mail, Mailinator, and 10MinuteMail. Our database covers 50,000+ disposable domains and updates daily.
Webhook Delivery
Get verification results pushed directly to your endpoint. Configure webhooks for real-time notifications on bulk job completion or individual checks.
Multi-format Export
Download your verification results as CSV, JSON, or TXT. Filter by status — export only valid, invalid, risky, or unknown emails separately.
See How We Stack Up
Brain Lead beats the competition on accuracy, features, and price — every single time.
| Feature | Brain Lead | ZeroBounce | NeverBounce | MillionVerifier |
|---|---|---|---|---|
| Price per email | $0.0005 | $0.008 | $0.008 | $0.0029 |
| Accuracy | 99.2% | 98% | 97% | 96% |
| Free tier | ✓ 10/day | 100 credits | 1,000 credits | ✗ |
| REST API | ✓ | ✓ | ✓ | ✓ |
| Bulk verification | ✓ Unlimited | ✓ | ✓ | ✓ |
| Catch-all detection | ✓ Advanced | ✓ | Basic | Basic |
| Disposable detection | ✓ 50K+ domains | ✓ | ✓ | Limited |
| Carrier lookup | ✓ Built-in | ✗ | ✗ | ✗ |
| SMS API | ✓ Built-in | ✗ | ✗ | ✗ |
Start Cleaning Your List Today
Join thousands of marketers and developers who trust Brain Lead to keep their email lists pristine.