Hunter.io earns a 4.4/5 on G2 and has a clear, defensible niche: domain-based email finding. You give it a company domain; it returns the email pattern and verified contacts at that company. For this specific use case, it's the best tool available, 70–80%+ accuracy, clean UI, unlimited team seats on paid plans, and transparent pricing starting at $34/mo.
But Hunter's limitations are equally clear: it is email-only. No phone numbers. No LinkedIn data. No browsable contact database. You have to know the company domain to use it, you can't search for 'VP of Engineering at SaaS companies in Austin.' For teams that have outgrown this single-channel, single-method approach, or that need phone numbers, LinkedIn enrichment, or a broader prospecting database, the alternatives below address each gap specifically.