Hunter.io is one of the most established email finder tools on the market, trusted by over 6 million users. It does one thing extremely well: finding and verifying professional email addresses. The Domain Search feature reveals all publicly listed emails at a company, and the email verifier checks deliverability with SMTP validation.
I have used Hunter on multiple projects, and the email accuracy is consistently high. The Chrome extension (600K+ users) integrates cleanly with LinkedIn and company websites. Cold email campaigns are built into the platform with scheduling, templates, custom tracking domains, and follow-up automation. Hunter also supports MCP integration for AI agent workflows, which is a forward-thinking addition.
The limitation is scope. Hunter only finds emails. There are no phone numbers, no reverse email lookup, no person or company enrichment, and no lead database. If you need someone's phone number, company firmographics, or a full professional profile from just an email address, Hunter cannot help.
Pricing: Free (50 credits/mo), Starter $34/mo (2,000 credits), Growth $104/mo (10,000 credits), Scale $209/mo (25,000 credits). No per-seat fees. One credit per email lookup, half a credit per verification.
At $34/mo for 2,000 credits, Hunter is affordable for email-only workflows. But 2,000 credits is small for teams doing serious outbound prospecting. The Growth plan ($104/mo for 10,000 credits) is where most teams land.

