Email Finder API — Find Business Email Addresses
An email finder API resolves a person's or company's professional email from a domain or name — the missing piece between a lead list and an outbound campaign. This guide covers the main players and how to combine them for maximum deliverability.
How email finder APIs work
Given a company domain (or name + company), the API returns verified email addresses with sources and confidence scores. Domain email finders crawl contact pages and check public sources; people finders match names to address patterns.
Build a complete lead pipeline
The classic stack: Google Maps scraper (business list) → company website scraper (domain + context) → email finder (addresses) → outreach. This directory contains every step as a ready worker — no code required.
Deliverability best practices
Only send to verified addresses (the APIs return confidence scores — use them), personalize every first line, warm up sending domains, and honor unsubscribes immediately. List quality beats list size every time.
Recommended workers
Ready-to-use scraping APIs from this directory — each with a live health score.
Frequently asked questions
Are email finder APIs legal?
Finding business emails for B2B outreach is standard practice; follow CAN-SPAM/GDPR, verify consent where required, and always provide an unsubscribe.
What's the accuracy of found emails?
Varies by provider — quality APIs return confidence scores and source attribution so you can filter to verified addresses only.
How is an email finder different from a data provider?
Data providers sell prebuilt lists; email finders build fresh, targeted lists from your own account selection — higher quality, more compliant.