HeroBounce is a B2B email verification platform built to solve the #1 problem in email validation: catch-all domains. While traditional email verifiers mark 30-40% of B2B emails as "unknown" when they encounter catch-all domains, HeroBounce uses advanced pattern analysis, SMTP intelligence, and domain behavior modeling to resolve these with industry-leading accuracy. Built for sales teams, growth marketers, and RevOps professionals who rely on cold outreach, HeroBounce goes beyond basic syntax and DNS checks. Its 6-layer verification engine combines real-time SMTP handshakes, MX record validation, disposable email detection, role-based account filtering, and proprietary catch-all resolution to deliver actionable results instead of unknowns. Key capabilities include bulk list verification, a developer-first REST API, domain intelligence that identifies email providers and security gateways, and a pattern discovery engine that learns domain-specific email formats to improve accuracy over time. HeroBounce is GDPR compliant, SOC-2 ready, and built for B2B teams that need reliable email data before hitting send.