Proofy - Quickly validate and verify your email lists.
BizProspex - BizProspex offers CRM data cleaning solutions.
BriteVerify - Email Validation & Email Verification reduces bounce rates up to 98%. Rapidly verifying email addresses has never been easier, just drag drop and deliver!
PCA Predict - PCA Predict is a customer data cleansing and enrichment solution.
Trumail - Free email verification API
Data Ladder - Data Ladder is a data quality software helping business users get the most out of their data through data matching, profiling, deduplication