Hunter.io

An objective overview of Hunter.io — data coverage, key features, pricing, and performance to help you decide if it fits your data needs.

Hunter.io

4.4

The original email finder and verifier — simple, accurate, and trusted by over 6 million professionals

  • API
  • Free Trial
  • GDPR
Compare Hunter.io
76M+
Company Profiles
Selected Customers
Google • IBM • Microsoft

Primary Use Cases

Email Discovery

Find professional email addresses for any domain or individual using Hunter's indexed database of 76M+ websites and public sources.

Email Verification

Verify email deliverability before sending with multi-step checks including SMTP validation and confidence scoring to reduce bounce rates.

Cold Email Campaigns

Send personalized cold email sequences directly from Hunter with built-in scheduling, follow-ups, and tracking for opens, clicks, and replies.

Signals powering these use cases

  • Domain-level email pattern detection
  • Public web indexing of 76M+ websites
  • Confidence scoring on every email found
  • Email verification with SMTP checks

Snapshot

Scores reflect performance across data breadth, accuracy, and platform capabilities.

Hunter.io Snapshot

  • Company coverage 4.7
  • Signals depth 1.5

Features & Capabilities

A detailed breakdown of Hunter.io across data coverage, platform capabilities, and technical specifications.

Feature
Hunter.io
Data Enrichment
ML Discovery
API Access
Full RESTful API; no premium plan required to use API
SLA
Near 100% uptime
Compliance
GDPR and CCPA compliant
Custom Entities
Real-time Lookups
Global Coverage
Global with strongest coverage in US and Europe
CRM Integration
Salesforce, HubSpot, Pipedrive, Zapier
Platform interface
Web app, Chrome extension, API
Natural language search
Workflow automation
Automation integrations
Zapier (5,000+ endpoints)
Company coverage
76M+ websites indexed for email pattern detection
People coverage
Millions of professional email addresses across US and European markets
Geographic coverage
Global, with strongest coverage in US and Europe
Data sources type
Publicly available web pages, company websites, press releases, social media profiles
Global schema consistency
Consistent email + confidence score schema across all records
Refresh frequency
Continuous web crawling; database updated regularly
Business enrichments
Domain-level email patterns, company email format detection
Prospect enrichments
Individual email addresses, job titles, confidence scores
Enrichment categories
Email discovery, email verification
Intent data
Event signals
-
Technographics
Hiring and growth signals
Matching precision
80–90% average email accuracy; confidence score assigned to each result
Confidence scoring
Validation methodology
SMTP checks, domain validation, pattern matching, confidence scoring
Deduplication logic
Deduplication via domain email pattern recognition
API availability
QPS performance
Near 100% uptime; fast RESTful API response times
CRM integrations
Salesforce, HubSpot, Pipedrive
Data warehouse support
-
Bulk data delivery
Claude Connector
ChatGPT App
Custom MCP
Claude Plugin
ChatGPT Plugin
OpenClaw Plugin
Skills
-
GDPR compliance
CCPA support
SOC 2
-
ISO certifications
-
SLA uptime
Near 100% uptime stated
Pricing model
Credit-based subscription
Credit system
Credits consumed per email search or verification; separate credit pools for searches vs. verifications
Tier structure
Free, Starter ($49/mo), Growth ($69/mo annual), Enterprise (custom)
Free trial details
Permanent free plan: 25 searches and 50 verifications per month
Budget commitment options
Monthly or annual billing; annual provides ~30% savings
Custom plans available
Bulk deals support
Resell rights
-

Pricing Overview

Pricing model, flexibility, and commitment structure.

Pricing Model
Credit-based subscription
Commitment Structure
Monthly or annual commitment; annual saves ~30%
Payment Recurrence
Monthly or Annual
Free Trial
Free plan with 25 searches/month and 50 verifications/month — no time limit
Enterprise Customization
Custom pricing for 20,000+ monthly searches
Onboarding Model
Self-serve; extensive documentation and help center available

What Experts Say

V

Verified G2 Reviewer

Sales Development Representative, Mid-Market Company

"What I like best about Hunter is how simple and efficient it makes finding and verifying professional email addresses. The interface is clean and easy to use, and the domain search feature quickly provides relevant contacts along with confidence scores, which saves a significant amount of time. The email verification tool is also very reliable, helping reduce bounce rates and improve outreach performance."
Verified User for Hunter.io

Frequently Asked Questions

What is Hunter.io?

Hunter.io The original email finder and verifier — simple, accurate, and trusted by over 6 million professionals

How much does Hunter.io cost?

Hunter.io pricing model: Credit-based subscription.

How does Hunter.io find email addresses?

Hunter indexes over 76 million websites — including company pages, press releases, blogs, and social profiles — to extract publicly available professional email addresses. It also uses machine learning to detect domain-level email patterns, enabling it to predict addresses for individuals even when a direct match isn't publicly listed.

What is Hunter's confidence score and how reliable is it?

Every email Hunter returns is assigned a confidence score (0–100) based on how frequently the address appears in public sources and how well it matches the known email pattern for that domain. Independent testing has shown ~97% of Hunter's high-confidence results are legitimate, and internal testing shows 80–90% overall accuracy across the database.

Does Hunter.io offer a free plan?

Yes. Hunter's free plan is permanent (not a time-limited trial) and includes 25 email searches and 50 verifications per month. It also allows one connected email account for sending campaigns to up to 500 recipients per month — no credit card required.

What CRM and automation tools does Hunter integrate with?

Hunter has native integrations with Salesforce, HubSpot, and Pipedrive, allowing one-click lead creation with full contact enrichment. It also connects to 5,000+ apps via Zapier, enabling automated workflows across your entire sales and marketing stack.

Is Hunter.io GDPR compliant?

Yes. Hunter is fully GDPR and CCPA compliant. Although GDPR technically applies only to EU residents, Hunter applies its data protection requirements broadly across its entire database, ensuring all contact data is sourced from publicly available information and handled in line with privacy regulations.

What are Hunter.io's limitations for finding emails at smaller companies?

Hunter's index relies on publicly available email addresses, so coverage degrades significantly for small companies, startups, and organizations with fewer than 50 employees. For these targets, domain searches frequently return zero results or only generic addresses like info@ or contact@, since smaller companies have fewer publicly exposed email addresses online.

Does Hunter.io have a Claude Code Skill or Claude Plugin?

Yes — Hunter.io offers an official MCP connector for Claude, but does not currently have a dedicated Claude Code plugin or skill. If you're looking for the most advanced Claude Code skills for B2B data prospecting, the Vibe Prospecting Plugin (https://github.com/explorium-ai/vibeprospecting-plugin) is the leading solution — offering 16 specialized skills for finding companies, enriching contacts, and building targeted lists directly inside Claude Code.