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Find emails for LinkedIn engagers with LeadMagic

Alfredo TalibWritten by , Founder, CornersightUpdated 9 November 2026

We don't sell emails. Connect your own LeadMagic account, and Cornersight finds emails for your ICP leads using your LeadMagic credits.

A buyer comments on a post

Alex Morgan · 2nd
Founder, Northpeak
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What do you check before you cold email someone?

87 reactions24 comments
Sophie Clark
Job title first. Then whether they have engaged with us before.
Marcus Jones Great point.

Your LeadMagic finds the email

Sophie Clark
Head of Growth, Brightline
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✓ ICP match
sophie@••••••••.com
Found with your LeadMagic key

Only ICP matches get an email lookup

Cornersight finds the people who react to or comment on the LinkedIn posts you pick, flags the ones that match your ideal customer, and finds emails for those matches with your own LeadMagic account.

Does Cornersight give emails?

No. We don't sell emails. Cornersight finds the people who engage with LinkedIn posts. Your own LeadMagic account finds their emails.

How does LeadMagic work with Cornersight?

You add your LeadMagic API key to a table's ICP filter. Cornersight then looks up emails for the leads that match your ICP, and keeps the first valid email.

Which leads get an email lookup?

Only leads that match your ICP get an email lookup. Set your ICP filter first, so lookups go to the people you want to contact.

Do email lookups use Cornersight credits?

The email lookup runs on your own LeadMagic key and credits. It uses no Cornersight credits. Each lead still costs 1 Cornersight credit.

What is LeadMagic?

LeadMagic describes itself as "Verified contact and company data for the workflows you already run". Its products include an Email Finder. You need your own LeadMagic account to use it with Cornersight.

How do I set it up?

Setup takes five steps:

  1. Start a 7-day free trial. No card needed.
  2. Track a profile, company page, post or keyword search.
  3. Open the table's ICP filter and set your ideal customer.
  4. Go to Integrations, Email enrichment, LeadMagic. Paste your LeadMagic API key and click Connect.
  5. On the Leads page, open the source's "+" menu, choose ICP Filter, click Add email waterfall, pick LeadMagic and click Save ICP Filter.

Where do the emails show up?

Emails your LeadMagic key finds show up with the lead in the Leads table and in the CSV export. They also go to PlusVibe: automatic sending waits until the email is found.

Do I need my LinkedIn login?

No login or cookies are needed. Cornersight finds who engaged without your LinkedIn login or cookies. Nothing runs on your account.

What does Cornersight cost?

Cornersight costs 1 credit per lead. Starter is $99 a month for 15,000 credits.

PlanPriceCredits a month
Starter$99 / month15,000
Growth$169 / month30,000
Pro$329 / month60,000
Scale$599 / month120,000

Billing is monthly. There is no annual plan. The 7-day free trial includes 3,700 credits and needs no card. LeadMagic bills you separately for its lookups.

Works with your stack

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PlusVibe logo
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Clay logo
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REST API

FAQ

Does Cornersight include phone numbers?

No. Cornersight leads come with name, job title, company, country, company details, the post, and the comment if they left one.

Can I send these leads to my outreach tool?

Yes. Cornersight pushes leads to HeyReach and PlusVibe, or sends them by webhook, the REST API, the MCP server, the CLI or a CSV export. Emails your finder finds are in the CSV export and go to PlusVibe.

Can I use a different email finder?

Use LeadMagic today. Ask us before you plan around a different email finder.

Find emails for LinkedIn engagers with LeadMagic