What SignalHire is
SignalHire is a phone number finders tool in the B2B go-to-market stack. In the vendor's own words: “Find Email Addresses &Phone Numbers by Name.” Put plainly, a tool in this category turns a name and a company into a mobile or direct-dial number.
Where it sits in an outbound stack
Most outbound stacks are four layers: the data that decides who you talk to, the channel that carries the message, the writing that earns a reply, and the system of record that remembers what happened. SignalHire sits in the phone number finders layer. Tools beside it are worth comparing on coverage and price; tools in the other layers are worth wiring to it rather than replacing it with.
Using SignalHire with M for Mercury
SignalHire is a data layer, and data is where LinkedIn outreach either works or wastes a sender. Mercury's Lead Finder searches 450M+ contacts and returns the LinkedIn profile to connect with alongside a verified work email, then enriches whatever is missing column by column. If SignalHire already holds your list, Mercury takes it from there: enrol the audience in a journey, spread it across senders, and pace every send inside safe limits.
Questions people ask about SignalHire
What is SignalHire?
SignalHire is a phone number finders tool used by B2B sales, marketing and recruiting teams. In the vendor's own words: Find Email Addresses &Phone Numbers by Name.
What category does SignalHire fall into?
SignalHire is listed under Phone Number Finders in this directory.
What are the alternatives to SignalHire?
The closest tools in the same categories are M for Mercury, FullEnrich, Apollo, Prospeo, Clay. All 31 phone number finders listings sit on the Phone Number Finders category page.
Can I use SignalHire alongside M for Mercury?
Yes. Mercury runs the LinkedIn side — audiences, journeys, message writing, safe pacing across every sender and one shared inbox — and connects out through HubSpot, Salesforce, Zoho CRM, Attio, Slack, Zapier, Make, n8n, webhooks and its own API, so SignalHire can stay exactly where it is in the stack.
Listed for reference. M for Mercury is not affiliated with SignalHire, and no listing here is paid for. Product names and logos belong to their owners.
M for Mercury
FullEnrich
Apollo
Prospeo
Clay
LeadMagic
Floqer
Wiza