4 Hunter.io Alternatives (Email OSINT and Verification)

Hunter.io is a freemium tool that finds and verifies professional email addresses associated with a domain — useful when you have an organisation and want to find the email format or a specific person's work address.

The alternatives below solve a related but different problem: rather than finding a domain's email addresses, they take a single email address you already have and investigate it — checking which sites it's registered on, whether it appears in breaches, or what it reveals about a linked Google account. Three of them (Holehe, GHunt, h8mail) are open source and run locally, which matters if you'd rather not send the address you're investigating to a third-party server; Epieos is freemium and hosted, closer to Hunter.io's account-based model.

Weigh whether you're starting from a domain (Hunter.io's use case) or from a single email address (what these four are built for), and whether running a local open-source tool versus a hosted account-based service fits how you work.

Looking at the original? See Hunter.io in the directory.

Alternatives

EpieosFreemium · dual-useReverse email lookup and digital-footprint tracing.Epieos is a freemium reverse email lookup and digital-footprint tracing tool, the closest match to Hunter.io's account-based model but working from a single address rather than a domain.

HoleheOpen source · dual-useChecks whether an email is registered on 120+ sites via password-reset flows.Holehe is open source and checks whether an email is registered on 120+ sites via password-reset flows, giving a free, local way to see where a single address is registered.

GHuntOpen source · dual-useInvestigates Google accounts, extracting data tied to a Gmail address.GHunt is open source and investigates Google accounts, extracting data tied to a Gmail address, which suits digging into a specific Gmail address rather than finding a company's email format.

h8mailOpen source · dual-useEmail OSINT and breach-hunting tool that pulls exposures for an address.h8mail is an open-source email OSINT and breach-hunting tool that pulls exposures for an address, useful if what you need is breach exposure rather than domain email discovery.

Browse the full tools directory →

Common questions

Is Hunter.io free?

Hunter.io is freemium — it has a free tier with limited searches and paid plans for higher volume.

Do these Hunter.io alternatives require an account?

Epieos is freemium like Hunter.io, while Holehe, GHunt and h8mail are open-source command-line tools you run yourself without signing up for an account.

Is it legal to check whether an email is registered on other sites?

Laws vary by jurisdiction and consent matters — checking your own email's exposure is different from investigating someone else without their knowledge. See our guide on ethics and law before using any of these on an address that isn't yours.

Can I use these tools to check my own email exposure?

Yes — running Holehe or h8mail against your own address is a reasonable way to see which sites it's registered on and whether it has appeared in known breaches.