Find Emails at Apollo.io Companies
Apollo.io is a B2B sales intelligence and engagement platform. Find and verify professional email addresses at companies using Apollo.io — from decision makers to company-wide contacts — with real-time SMTP verification.
Why target Apollo.io companies?
Technology usage is one of the strongest intent signals in B2B outreach. Companies using Apollo.io share a common profile: they've invested in a specific sales intelligence solution, which tells you a great deal about their size, priorities, and buying behavior.
Knowing a company uses Apollo.io lets you write a more relevant pitch, reference their existing stack in your outreach, and identify which buyer persona is most likely to respond — before you send a single email.
How to find emails at Apollo.io companies
Identify Apollo.io companies
Use a tech stack detection tool (BuiltWith, SimilarTech, Wappalyzer) to export a list of companies using Apollo.io. Each company comes with a domain.
Find decision-maker emails
Pass each company domain to emailfinder.dev's decision-maker endpoint to get the email, name, and title of the right buyer — CEO, VP Sales, CTO, or Head of Marketing.
Or find all company emails
Use the company endpoint to return up to 20 verified email addresses per domain — useful for multi-threading your outreach across multiple stakeholders.
Verify and send
Every result is verified live via SMTP before it's returned. You only pay for confirmed deliverable addresses, so your list is clean before you send a single email.
API example
# Find decision-maker at a Apollo.io company
GET /api/find-email/decision-maker
?domain=example.com
&decision_maker_category=ceo
Authorization: Bearer YOUR_API_KEY
# Response
{
"valid_email": "jane@example.com",
"person_full_name": "Jane Doe",
"person_job_title": "CEO",
"credits_charged": 5
}FAQ
How do I find emails at companies using Apollo.io?
Use the emailfinder.dev API. First identify companies using Apollo.io (via tools like BuiltWith, SimilarTech, or Wappalyzer), then pass each company's domain to the /api/find-email/company endpoint to get verified email addresses for that organization.
Can I find decision-maker emails at Apollo.io companies?
Yes. The decision-maker endpoint returns the email, name, and title of a specific role (CEO, VP Sales, CTO, Head of Marketing, etc.) at any company domain. This is ideal for targeting the right buyer at Apollo.io companies.
How accurate are the emails for Apollo.io companies?
Every email returned by emailfinder.dev is verified live via SMTP at the moment of the request. The mail server confirms the mailbox exists before the email is returned to you. If the mailbox cannot be confirmed, you receive not_found and are not charged.
How do I use tech stack data for outreach?
Technology usage is a strong intent signal. Knowing a company uses Apollo.io lets you personalize your pitch around their existing stack, identify the right buyer persona, and qualify accounts for fit before reaching out. Combine tech stack filtering with emailfinder.dev to go from company list to verified contacts in minutes.
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Find emails at Apollo.io companies free
Free credits included. No credit card required. Pay only for verified results.