Heybounce

About Heybounce

Heybounce is an email validation service offering both bulk list verification and a real-time verification API. Users upload CSV or XLSX files for bulk cleaning of mailing lists, or integrate the HTTP API to validate email addresses during sign-up flows, with responses returned in under 100ms.

The verification checks include SMTP verification, syntax and domain validation, disposable email detection, accept-all (catch-all) detection, free email detection, role-based address detection, mailbox-full detection, no-reply detection, spam trap removal, risk validation for high-risk keywords and TLDs, MTA/MX record checks, complainer database matching, and academic email detection. The API returns structured JSON data including deliverability status, domain and MX record details, and SMTP provider information.

The service is aimed at developers and marketing teams that need to maintain clean mailing lists and reduce bounce rates. It offers a free tier of 100 credits with no credit card required, credit-based pricing where "unknown" results are not charged, and team accounts allowing multiple members to collaborate on one account.

Key features

• Real-time email verification API with SMTP-level validation
• Bulk CSV/XLSX list upload and verification
• Detects disposable, role-based, free, and academic email addresses
• Accept-all (catch-all) and spam trap detection
• Risk scoring for high-risk keywords and shady TLDs
• Team accounts for collaborating with multiple members

Frequently asked questions