NeverBounce

Bulk Email Checker has verified more than 12 billion addresses since 2012 for over 400,000 customers. Real-time SMTP verification delivers 99.7% accuracy by handshaking directly with mail servers rather than querying cached databases. Upload a CSV or TXT file to clean an existing list, or call the REST API to validate addresses at signup and checkout. Every result includes disposable detection, role account flags, catch-all handling, spam trap identification, domain typo correction, and MX server intelligence returning IP, hostname, location, ISP, and ASN. Pricing is pay-as-you-go from $2.95 per 1,000 verifications down to $0.000132 per address at 25 million. No monthly fees, no contracts, and credits never expire. Duplicates and unknown results consume nothing. High-volume users can switch to the Unlimited API for flat thread-based pricing from $250 per month with no per-email cost.

ZeroBounce is an email verification, scoring and deliverability platform helping businesses improve their inbox placement. The service detects email typos, nonexistent and abusive email accounts, spam traps and other risky email addresses. ZeroBounce also provides an email scoring service and a suite of deliverability tools to further enhance email inbox placement. The company operates a military-grade security infrastructure, ensuring customer data is protected at the highest levels. With more than 23 billion emails validated to date, ZeroBounce serves 400,000+ businesses in 190+ countries and adds up to 200 new clients every day. Companies using email lists validated by ZeroBounce report a 99%+ accuracy rate and maintain a good sending reputation. In 2019, ZeroBounce took no. 851 on the Inc. 5000 list of the fastest-growing private companies in the United States. In 2020, ZeroBounce rose to no. 40 on the list. In 2021, ZeroBounce was number 9 on the Inc. 5000 Regionals list.