The accurate & low-cost email verification API
Instantly detect bad email addresses through your own websites and applications.
500 free credits
Production-ready email verification in minutes.
Protect your database and deliverability with our highly accurate, easy-to-integrate API.
Implement email verification in minutes.
Our API verifies emails and returns the results to your application or website in milliseconds.
Build a production-ready integration in just 30 minutes
Highly accurate 20+ point email verification in <500ms
Simple documentation and sample code
See insights on API usage and results over time.
Get a birds-eye-view on your API usage and identify patterns in your verification results over time.
Scalable and reliable with a 99.9% uptime guarantee
Batch operations supported - up to 50,000 emails per request
Highly secure with AES-256 encryption, HTTPS, and a 30-day retention policy.
Accurate and reliable email verification
99% Deliverability Guarantee
Our 20+ point email verification engine is battle-tested and engineered to give you the most accurate and reliable results.
Private and Secure
Our system's data is stored in ISO 27001 and SOC 2 certified facilities, and we secure all transmitted data with 256-bit TLS encryption.
Top-notch Support
Our customer support team is always ready to help and answer your questions quickly.
Cutting-edge email verification features
Disposable Email Detection
We identify if any emails in your list belong to a temporary email address provider.
Email Verification API
Integrate our state-of-the-art verification engine into your own website or application.
Customized Exports
Filter by and export only the email addresses which meet specific criteria defined by you.
99% Deliverability Guarantee
We guarantee that no more than 1% of the emails we mark as “deliverable” will bounce.
Team Accounts
Invite team members to share credits, monitor usage, and analyze results together.
Real-Time Results
Get live email verification results as we instantly process your list.
Top-Notch Support
Our customer support team is ready to help and answer all of your questions quickly.
Free Email Detection
Our system reveals which emails in your list belong to a free email address provider.
Accept-All Email Detection
Identify email addresses linked to 'Accept-All' servers - inboxes which might not actually exist.
MX Record Detection
We find and reveal the MX record associated with each email on your list.
SMTP Provider Info
Quickly discover the email providers that your emails are hosted by.
Misspelled Domain Check
Detects typos in the email address and suggests the potential correction.
Syntax Validation
Verify an email address’s format is valid before you hit send.
Domain Validation
Ensures the email's domain is actually registered and functioning correctly.
SMTP Verification
Advanced SMTP server checks to determine whether or not the inbox is deliverable.
Email Deduplication
Instantly detect and remove duplicate email addresses from your lists.
Role Email Detection
Detect which emails are role-based and therefore riskier to send to.
Secure By Design
All data is stored in ISO 27001 and SOC 2 certified facilities, and auto-deleted after 30 days.
App Integrations
Integrate with your email sending platform, CRM, and other tools you already use.
Email Quality Score
Our advanced algorithm assigns a quality score to each email on your list from 0 to 100.
Spam Trap Detection
Our system double-checks to see if any of your emails are likely to be spam traps.
Anti-Greylisting Technology
ListCleanser’s email verification engine automatically detects and bypasses graylisting.
Drag & Drop Uploads
Instantly upload your list by drag-and-dropping it right into ListCleanser.
In-Depth Reporting
See highly detailed information about the health of every list and email address you verify.
Try the Verification API for free
500 free credits
