This page does not find emails. We don't run an email-finder service. What we do: explain how the popular email-finder tools work, when to use them ethically, and what to do with the email once you have it.
How email-finder tools work
Email finders use a few techniques in combination:
- Pattern guessing. Most B2B emails follow predictable patterns:
firstname.lastname@company.com,flastname@company.com, etc. Tools build a database of which pattern each company uses by observing which emails actually get delivered. - SMTP verification. Connect to the company's mail server and ask whether a specific address exists, without actually sending mail. Most servers respond honestly.
- Public-data scraping. Press releases, GitHub commits, conference programs, and company directories often expose emails publicly.
- Crowdsourced contributions. Some tools (Hunter, Apollo) build their database from emails their users have legitimately collected through normal use.
The major tools and what they're good at
Hunter.io
Pattern-finder + SMTP verification. Solid bulk-export workflows. ~$49–399/mo by volume tier. Best for: targeted prospecting where you know the company and want the email for a specific person.
Apollo
Includes email-finder as part of broader prospecting database. Good database, weaker deliverability than dedicated tools. ~$59–179/mo. Best for: teams already using Apollo for sourcing.
RocketReach
Strong on senior-executive emails (where the public-data sources are richer). ~$80–165/mo. Best for: enterprise sales targeting C-suite.
Wiza
LinkedIn-first email enrichment. Pulls emails for prospects in a Sales Navigator search. ~$83–500/mo by volume. Best for: pairing with LinkedIn-driven prospecting.
Lusha
Chrome extension that surfaces emails on LinkedIn profile views. ~$36–79/mo per seat. Best for: real-time prospect-by-prospect lookup.
The legal posture
Email enrichment is generally lawful for B2B professional contacts under GDPR's legitimate-interest basis (Article 6(1)(f)) and similar US/Canada/UK regulatory frameworks. The conditions:
- The contact is being approached in their professional capacity, at their work email.
- The outreach is relevant to their professional role.
- The email is sourced from public/professional contexts, not consumer breach data.
- Opt-out is honored immediately and tracked across campaigns.
Email enrichment for personal email addresses (gmail.com, yahoo.com, icloud.com) is much more legally risky and we'd avoid it unless you have explicit consent. Full GDPR guide.
Email deliverability is the bigger problem
Finding the email is the easy part. Getting it delivered to the inbox in 2026 is the hard part.
Two major issues kill cold email deliverability:
- Sender reputation. Cold-email volume from new domains lands in spam. Warming up a sending domain takes 4–6 weeks of low-volume warmup before serious sending.
- Apple Mail Privacy + aggressive Gmail filtering. Open rates are broken since 2021, and Gmail's Postmaster Tools spam filter is increasingly intolerant of cold email at scale.
The result: most cold-email campaigns in 2026 land at 1–3% reply rates, down from 4–6% in 2020. The math has shifted. Multi-channel (LinkedIn + email) is the right shape; email-only campaigns rarely work anymore.
What to do with the email once you have it
- Coordinate with LinkedIn outreach. Send the LinkedIn invite first; email follow-up Day 4. Channel order matters.
- Use a warmed-up sending domain. Don't send cold email from your primary company domain. Use a sub-domain (
send.yourcompany.com) that you've warmed up specifically for cold sending. - Skip tracking pixels for EU contacts. Tracking pixels in cold email require ePrivacy consent. Don't include them for EU recipients.
- Suppress on negative reply. Single global suppression list across all your campaigns. Honor opt-outs within 24 hours.
How Infonet handles email enrichment
Infonet integrates with Apollo, Hunter, Clay, RocketReach, and others via API. We don't run our own email-finder — the existing tools do the job well, and we focus on the LinkedIn + multi-channel sending layer where we have differentiation.
The pattern: enrich in Apollo or Clay, push to Infonet for sequenced multi-channel sending, log replies back to your CRM.
Run multi-channel sequences with Infonet
Email follow-up after LinkedIn, coordinated with your enrichment tool of choice. Free 14-day trial.
Start free trial