Hunter.io is a B2B email outreach and verification platform designed to help sales, marketing, recruiting, and founder-led teams connect with the right people at target companies. It combines a large, continuously refreshed database of professional email addresses with tools to discover new accounts, find individual contacts, verify deliverability, and run cold email campaigns from a single interface.
Founded in 2015 by Antoine Finkelstein and François Grante, Hunter was one of the first tools to systematically leverage the public web as a data source for email discovery. It began with the flagship Domain Search feature and has since expanded to include Email Finder, Email Verifier, bulk search and verification, a built-in leads database, Signals for intent and company event tracking, TechLookup, and a full campaigns module with an AI writing assistant.
The company is headquartered in Wilmington, Delaware and operates as a fully remote, privately held team in the 11–50 employee range. Hunter positions itself as a transparent and privacy-conscious alternative to opaque data brokers, emphasizing that it only uses publicly available data, surfaces the sources for each email, and provides guidance to help customers stay compliant with regulations like GDPR. More than 6 million professionals use Hunter to support use cases such as outbound sales, partnership outreach, recruiting, PR/link-building, and product-led growth initiatives.
In the email and contact data market, Hunter sits between lightweight point tools and heavyweight data platforms. Compared with larger sales intelligence and engagement suites, it is more affordable and easier to adopt, while still offering native integrations with leading CRMs, email providers, and automation platforms, plus a robust API and data platform for teams that need programmatic access to email data at scale.
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