NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
Clearbit - Clearbit provides Business Intelligence APIs
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI
Lead411 - Lead411 is the Top B2B Marketing & Sales Intelligence data platform for prospecting, contact enrichment, Bombora intent and list building. Get Verified Emails, Direct Dials and Company Intel to improve your sales pipeline.
DeBounce - Email Validation, Email Checker, Data Enrichment and Appending Tool. Using DeBounce remove invalid, disposable, spam-trap, syntax and deactivated emails.
Cloudingo - Cloudingo - a cloud-based SaaS, connects to Salesforce and allows system administrators to scan their entire database for similar or duplicate records.