About Signal Plug
Signal Plug is a professional email discovery platform built for sales teams, marketers, and recruiters who need accurate contact information to power their outreach. Our mission is to make finding verified professional email addresses fast, accurate, and accessible for every team.
What We Do
Signal Plug searches for and verifies professional email addresses in real time. When you enter a person's name and their company domain, we search our verification network, test email deliverability, and return the most likely valid address along with a confidence score and contact enrichment data including job titles and LinkedIn profiles.
Our Data Standards
We only surface email addresses we have evidence for. Every result includes a deliverability status (Valid, Risky, or Invalid) and a confidence score from 0 to 100. We do not fabricate or guess email addresses — if we can't verify an address with sufficient confidence, we say so.
Our company directory covers 14,872 real companies with verified data sourced from public records, Wikipedia, and Wikidata. We maintain strict quality standards: only real, verified descriptions appear in our directory. We removed over 10,700 AI-generated descriptions to ensure accuracy.
Use Cases
- Sales prospecting — reach decision-makers at target accounts
- Marketing outreach — build contact lists for ABM and demand gen
- Recruiter sourcing — reach passive candidates directly