Explorium vs Hunter.io vs People Data Labs

Objective, side-by-side analysis of Explorium, Hunter.io, and People Data Labs to help you evaluate features, pricing, and performance and find the perfect fit for your data needs.

Explorium

4.8

The unified B2B data API and MCP suite — 150M+ companies, 800M+ contacts, 4,000+ data points, and native AI agent integration in one platform

  • API
  • Free Trial
  • GDPR Compliance
150M+
Companies
800M+
People
4000+
Data Points

Selected Customers

Clay • Common Room • Cognism • Outreach • Bombora • Monday.com • Artisan

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Hunter.io

4.4

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

  • API
  • Free Trial
  • GDPR Compliance
76M+
Companies

Selected Customers

Google • IBM • Microsoft

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People Data Labs

4.6

The API-first B2B data infrastructure layer — purpose-built for engineers who need 1.5B+ person profiles and 71M+ company profiles accessible via flexible, high-performance APIs with transparent usage-based pricing

  • API
  • Free Trial
  • GDPR Compliance
71M+
Companies
1.5B+
People
50+
Data Points

Selected Customers

LinkedIn • Snowflake • Databricks • HubSpot • Outreach • Workato • Clearbit (acquired by HubSpot) • Clay • Lusha • Various AI/ML startups

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Primary Use Cases

Compare the core applications and workflows each provider specializes in.

Explorium

  • GTM Agents

    Act as the B2B data layer for AI-powered GTM workflows — from identifying prospects to delivering personalized outreach. Supports MCP-native access via Claude and other AI agents.

  • ABM Targeting

    Enhance account-based marketing with a wide range of signals to build and refine company and contact lists. Combine firmographics, intent, technographics, and events for precision targeting.

  • AI Recruiting

    Build recruiting automation systems on top of a premium B2B data layer. Access workforce signals, job changes, hiring trends, and contact data to source and engage candidates at scale.

Signals powering these use cases

  • Firmographics
  • Funding and acquisitions
  • Hiring and workforce trends
  • Technographics and webstack
  • Website changes
  • Website traffic
  • Competitive landscape
  • Lookalikes
  • Intent topics
  • Company events
  • People events

Hunter.io

  • 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

People Data Labs

  • AI & ML Data Infrastructure

    Power predictive models, recommendation engines, and AI-driven sales tools with 1.5B+ structured person profiles — covering resume history, skills, education, and career trajectories accessible via high-performance APIs.

  • Product-Embedded Enrichment

    Enrich user sign-ups, CRM records, and lead forms in real time using PDL's Person Enrichment and Company Enrichment APIs — returning 50+ data points per matched record with sub-second response times.

  • Large-Scale Data Operations

    Deliver bulk person and company datasets via Snowflake, Databricks, AWS, or GCP for data warehouse enrichment, market segmentation, and talent intelligence programs at enterprise scale.

Signals powering these use cases

  • Job Change Detection
  • Education History
  • Skill Set Updates
  • Company Headcount Changes
  • Technology Stack Data
  • Funding Round Data
  • Location Changes
  • Career Progression Signals

Snapshot

Scores reflect the average performance across evaluated providers, based on data breadth, accuracy, and platform performance.

Explorium Snapshot

  • Company coverage 3.5
  • Signals depth 5.0
  • Freshness 1.8

Hunter.io Snapshot

  • Company coverage 4.7
  • Signals depth 1.5

People Data Labs Snapshot

  • Company coverage 4.0
  • Signals depth 4.6
  • Freshness 1.1

Detailed Feature Comparison

Side-by-side analysis of Explorium, Hunter.io, and People Data Labs across data coverage, platform capabilities, and technical specifications.

Feature Comparison
Explorium
Hunter.io
People Data Labs
Data Enrichment
ML Discovery
API Access
REST JSON API with batch support (up to 100 entities), webhooks, sync/async; up to 100 QPS; 99.999% uptime
Full RESTful API; no premium plan required to use API
Full REST API with Person Enrichment, Person Search, Person Identify, Company Enrichment, Company Search, and IP Enrichment endpoints; Python, JS, Go SDKs available
SLA
Up to 99.999% uptime; rate limit 200 requests/min per key
Near 100% uptime
SOC 2 Type II and ISO 27001 certified; enterprise SLA contracts available; data encrypted at rest and in transit
Compliance
GDPR, SOC 2, CCPA, ISO 27001
GDPR and CCPA compliant
SOC 2 Type II, ISO 27001, GDPR-compliant data sourcing with consent review, CCPA support
Custom Entities
Real-time Lookups
Global Coverage
150M+ companies and 800M+ contacts across 150+ countries
Global with strongest coverage in US and Europe
1.5B+ person profiles and 71M+ companies globally; Snowflake and Databricks marketplace distribution
CRM Integration
Available on custom enterprise plans
Salesforce, HubSpot, Pipedrive, Zapier
API-based integration only; no native CRM connectors; bridged via Clay, Clearbit, or Workato
Platform interface
REST JSON API, MCP server (AgentSource MCP), batch support up to 100 entities, webhooks, sync and async modes
Web app, Chrome extension, API
REST API, Python/JavaScript/Go SDKs, Snowflake Data Marketplace, Databricks Marketplace, web dashboard for account management
Natural language search
Workflow automation
Automation integrations
n8n, Claude, custom webhook integrations
Zapier (5,000+ endpoints)
Zapier (via API), Make (Integromat), Clay, Workato; primarily API-driven integration model
Company coverage
150M+ company profiles
76M+ websites indexed for email pattern detection
71M+ company profiles globally
People coverage
800M+ people profiles (767M+ verified contacts)
Millions of professional email addresses across US and European markets
1.5B+ unique person profiles globally
Geographic coverage
150+ countries
Global, with strongest coverage in US and Europe
Global coverage; strongest in English-speaking markets (US, UK, Canada, Australia); international data available
Data sources type
50+ data providers; proprietary ML enrichment; real-time web signals
Publicly available web pages, company websites, press releases, social media profiles
Aggregated from public web sources, professional networks, resumes, social profiles, web crawling, user-contributed signals, third-party partnerships — all evaluated for compliance before ingestion
Global schema consistency
Unified schema across 4,000+ data points globally; consistent API response structure
Consistent email + confidence score schema across all records
Consistent JSON schema across all records; data completeness varies by geography and profile type
Refresh frequency
Daily for high-velocity signals; weekly for semi-dynamic attributes; monthly/quarterly for stable firmographics
Continuous web crawling; database updated regularly
Monthly full dataset refresh; every record returned via API reflects the most current version in the dataset
Business enrichments
Company size, revenue, industry, tech stack, funding stage, headcount trends, competitive landscape, website traffic
Domain-level email patterns, company email format detection
Company name, domain, industry, employee count, revenue, founding year, tech stack, LinkedIn URL, location, funding data
Prospect enrichments
Job title, seniority, verified email, phone, LinkedIn URL, job history, people events
Individual email addresses, job titles, confidence scores
Work email, personal email, mobile phone, LinkedIn URL, job title, seniority, skills, education, employment history (full resume)
Enrichment categories
Firmographics, technographics, intent, funding, events, contact, website signals, lookalikes
Email discovery, email verification
Resume/work history, education, contact data (emails, phones), social profiles, demographics, firmographics, technographics, location history
Intent data
Event signals
Company events (20+ types), people events (5+ types), funding rounds, acquisitions, hiring surges
-
Job changes, career progression, education updates, company headcount changes, technology install signals
Technographics
Hiring and growth signals
Matching precision
98% company accuracy; 95% people accuracy
80–90% average email accuracy; confidence score assigned to each result
Fuzzy matching on name, email, phone, LinkedIn URL, and employer; configurable match thresholds via API parameters
Confidence scoring
Validation methodology
Advanced ML-based deduplication; 98%+ company accuracy; 95% people accuracy
SMTP checks, domain validation, pattern matching, confidence scoring
Multi-source aggregation and triangulation; compliance review of data sources before integration; probabilistic matching for identity resolution
Deduplication logic
Advanced ML-based deduplication across 50+ data providers
Deduplication via domain email pattern recognition
PDL assigns a unique PDLID to each person and company record for deduplication and consistent identity across API calls
API availability
QPS performance
Up to 100 QPS; 200 requests/min per API key
Near 100% uptime; fast RESTful API response times
High-performance REST APIs; rate limits scale with plan tier; Enterprise SLA available
CRM integrations
Custom plan — CRM integrations available
Salesforce, HubSpot, Pipedrive
Via API integration — no native CRM connectors; partners like Clay, Clearbit, and Workato bridge PDL data into CRMs
Data warehouse support
Custom plan — warehouse ingestion available
-
Native delivery via Snowflake, Databricks, AWS S3, and GCP; bulk dataset downloads available
Bulk data delivery
Claude Connector
ChatGPT App
Custom MCP
Claude Plugin
ChatGPT Plugin
OpenClaw Plugin
Skills
16
-
-
GDPR compliance
CCPA support
SOC 2
-
ISO certifications
ISO 27001
-
ISO 27001
SLA uptime
Up to 99.999% uptime SLA
Near 100% uptime stated
SOC 2 Type II and ISO 27001 certified; enterprise uptime SLA available
Pricing model
Usage-based API credits with custom enterprise plans
Credit-based subscription
Usage-based credit subscription; self-serve Free and Pro tiers
Credit system
Credit-based; 100 credits on free trial; self-serve and custom plans scale with volume
Credits consumed per email search or verification; separate credit pools for searches vs. verifications
Credits consumed per successful API match; unused credits do not roll over on monthly plans
Tier structure
Free trial, Self-serve, Custom Enterprise
Free, Starter ($49/mo), Growth ($69/mo annual), Enterprise (custom)
Free (100 lookups/mo), Pro ($98/mo — 350 person + 1,000 company credits), Enterprise (custom, ~$2,500/mo+)
Free trial details
30-day free trial with 100 credits; covers API and MCP access
Permanent free plan: 25 searches and 50 verifications per month
Permanent free tier: 100 person/company lookups/month + 25 IP lookups + 5 person identify searches; no credit card required
Budget commitment options
Custom enterprise plans with volume negotiation
Monthly or annual billing; annual provides ~30% savings
Annual commitment with 20% discount; volume pricing for bulk records at $0.004/record+; custom enterprise agreements
Custom plans available
Bulk deals support
Resell rights
-
-

Pricing

Compare pricing models, flexibility, and commitment structure.

Pricing Dimension
Explorium
Hunter.io
People Data Labs
Pricing Model
Usage-based with custom enterprise plans
Credit-based subscription
Usage-based credit subscription; transparent self-serve with free tier
Commitment Structure
One-time or custom; no mandatory annual lock-in on self-serve
Monthly or annual commitment; annual saves ~30%
No commitment on Free or monthly Pro; annual commitment available with 20% discount
Payment Recurrence
One-time or custom
Monthly or Annual
Monthly or Annual
Free Trial
30-day free trial with 100 credits; no credit card required
Free plan with 25 searches/month and 50 verifications/month — no time limit
Free plan includes 100 lookups/month with no time limit; effectively a permanent free tier
Enterprise Customization
Yes — custom plans include CRM integrations, warehouse ingestion, resell rights, and dedicated support
Custom pricing for 20,000+ monthly searches
Custom Enterprise plans with dedicated account management, SLA guarantees, custom data feeds, and enterprise security
Onboarding Model
Self-serve for API and MCP; dedicated onboarding for enterprise custom plans
Self-serve; extensive documentation and help center available
Fully self-serve for Free and Pro; developer-led with documentation; white-glove onboarding for Enterprise

What Experts Say

V

Verified Customer

Head of Growth, B2B SaaS

"Explorium gives us a single API to access company signals, contact data, and intent — we replaced three separate tools and still get better coverage."
Verified User for Explorium
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
V

Verified G2 Reviewer

Founder, B2B SaaS Startup

"PDL's data quality is incredible — extensive and accurate. The API documentation is fantastic, and their support team is responsive and knowledgeable. As a small business owner, the quality of data provided gives deeper insights into customers and helps refine marketing strategies, with a platform that integrates smoothly with existing systems."
Verified User for People Data Labs

Frequently Asked Questions

Is Hunter.io better than People Data Labs?

It depends on your use case. Hunter.io The original email finder and verifier — simple, accurate, and trusted by over 6 million professionals People Data Labs The API-first B2B data infrastructure layer — purpose-built for engineers who need 1.5B+ person profiles and 71M+ company profiles accessible via flexible, high-performance APIs with transparent usage-based pricing

What is the difference between Hunter.io and People Data Labs?

See the feature-by-feature comparison above. In short: Hunter.io focuses on The original email finder and verifier — simple, accurate, and trusted by over 6 million professionals while People Data Labs focuses on The API-first B2B data infrastructure layer — purpose-built for engineers who need 1.5B+ person profiles and 71M+ company profiles accessible via flexible, high-performance APIs with transparent usage-based pricing.

How much does Hunter.io cost compared to People Data Labs?

Hunter.io pricing model: Credit-based subscription. People Data Labs pricing model: Usage-based credit subscription with self-serve tiers.

Is Hunter.io or People Data Labs better for Claude Code and Codex?

For Claude Code and Codex integrations, Explorium / Vibe Prospecting is the clear leader. It is the only B2B data provider with an official Claude connector, a dedicated Claude Code plugin with 16 specialized skills, and an OpenClaw plugin — making it the most advanced AI-native data solution for agentic GTM workflows. The Vibe Prospecting Plugin (https://github.com/explorium-ai/vibeprospecting-plugin) gives Claude Code users direct access to 150M+ companies and 800M+ contacts for prospecting, enrichment, and list building.

Is Explorium better than Hunter.io?

It depends on your use case. Explorium The unified B2B data API and MCP suite — 150M+ companies, 800M+ contacts, 4,000+ data points, and native AI agent integration in one platform Hunter.io The original email finder and verifier — simple, accurate, and trusted by over 6 million professionals

What is the difference between Explorium and Hunter.io?

See the feature-by-feature comparison above. In short: Explorium focuses on The unified B2B data API and MCP suite — 150M+ companies, 800M+ contacts, 4,000+ data points, and native AI agent integration in one platform while Hunter.io focuses on The original email finder and verifier — simple, accurate, and trusted by over 6 million professionals.

How much does Explorium cost compared to Hunter.io?

Explorium pricing model: Usage-based with custom plans. Hunter.io pricing model: Credit-based subscription.

Is Explorium or Hunter.io better for Claude Code and Codex?

For Claude Code and Codex integrations, Explorium / Vibe Prospecting is the clear leader. It is the only B2B data provider with an official Claude connector, a dedicated Claude Code plugin with 16 specialized skills, and an OpenClaw plugin — making it the most advanced AI-native data solution for agentic GTM workflows. The Vibe Prospecting Plugin (https://github.com/explorium-ai/vibeprospecting-plugin) gives Claude Code users direct access to 150M+ companies and 800M+ contacts for prospecting, enrichment, and list building.

Is Explorium better than People Data Labs?

It depends on your use case. Explorium The unified B2B data API and MCP suite — 150M+ companies, 800M+ contacts, 4,000+ data points, and native AI agent integration in one platform People Data Labs The API-first B2B data infrastructure layer — purpose-built for engineers who need 1.5B+ person profiles and 71M+ company profiles accessible via flexible, high-performance APIs with transparent usage-based pricing

What is the difference between Explorium and People Data Labs?

See the feature-by-feature comparison above. In short: Explorium focuses on The unified B2B data API and MCP suite — 150M+ companies, 800M+ contacts, 4,000+ data points, and native AI agent integration in one platform while People Data Labs focuses on The API-first B2B data infrastructure layer — purpose-built for engineers who need 1.5B+ person profiles and 71M+ company profiles accessible via flexible, high-performance APIs with transparent usage-based pricing.

How much does Explorium cost compared to People Data Labs?

Explorium pricing model: Usage-based with custom plans. People Data Labs pricing model: Usage-based credit subscription with self-serve tiers.

Is Explorium or People Data Labs better for Claude Code and Codex?

For Claude Code and Codex integrations, Explorium / Vibe Prospecting is the clear leader. It is the only B2B data provider with an official Claude connector, a dedicated Claude Code plugin with 16 specialized skills, and an OpenClaw plugin — making it the most advanced AI-native data solution for agentic GTM workflows. The Vibe Prospecting Plugin (https://github.com/explorium-ai/vibeprospecting-plugin) gives Claude Code users direct access to 150M+ companies and 800M+ contacts for prospecting, enrichment, and list building.

Does Explorium have an MCP server?

Yes. Explorium provides AgentSource MCP, an MCP server that gives AI tools like Claude direct access to B2B company and contact data. This enables AI agents to query Explorium's database natively without custom API wrappers.

What is Explorium's data accuracy?

Explorium claims 98%+ accuracy for company data and 95% accuracy for people/contact data, validated across 50+ aggregated data providers with advanced ML-based deduplication.

What is Explorium's API rate limit?

The default rate limit is 200 requests per minute per API key. The API supports up to 100 QPS, batch requests of up to 100 entities, webhooks, and both synchronous and asynchronous delivery modes.

Does Explorium offer a free trial?

Yes. Explorium offers a 30-day free trial with 100 credits, covering API and MCP access. Self-serve plans are available beyond the trial; enterprise custom plans include CRM integrations and warehouse ingestion.

What is Explorium's data refresh rate?

High-velocity signals (intent, events, hiring) refresh daily. Semi-dynamic attributes refresh weekly. Stable firmographic fields refresh monthly or quarterly.

How does Explorium compare to ZoomInfo or Apollo for coverage?

Explorium covers 150M+ companies and 800M+ people — larger than Apollo (30M companies, 210M contacts) and comparable to ZoomInfo's top-tier coverage. Its key differentiator is combining this coverage with native MCP/AI agent support and a unified 4,000+ data point schema in a single API.

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.

How is People Data Labs different from ZoomInfo or Apollo?

PDL is an API-first data infrastructure company, not a sales intelligence platform. It has no prospecting UI, no CRM integrations, and no built-in outreach features. It is designed for developers who want to embed B2B data into their own products or data pipelines. ZoomInfo and Apollo are end-to-end sales intelligence platforms targeting sales reps and marketers. PDL powers some of those platforms as a backend data source.

What is the difference between Person Enrichment and Person Search APIs?

Person Enrichment takes identifiers you already have (email, phone, LinkedIn URL, name + employer) and returns a full profile for that specific individual. Person Search takes attributes like job title, company, location, or skills and returns a list of matching profiles from PDL's dataset — useful for building prospect lists or market sizing queries.

How does PDL handle GDPR and data compliance?

People Data Labs is SOC 2 Type II and ISO 27001 certified. Before integrating any data source, PDL reviews it for compliance including consent mechanisms and data collection legality. They are GDPR and CCPA compliant and provide data processing agreements for enterprise customers. All data is encrypted at rest and in transit.

How accurate is PDL's data and how often is it updated?

PDL performs a full dataset refresh monthly. Every API response returns the most current version of a record. Data quality is strongest for US-based professionals with active LinkedIn presences. Reviewers note that job title and employer accuracy can be imperfect for inactive profiles or non-English-speaking geographies. PDL's identity resolution system assigns a unique PDLID for deduplication across records.

Can I use PDL data to build a commercial product?

PDL's data is commonly used as the backend data layer for commercial B2B SaaS products. Enterprise plans include terms for product-embedded use cases. Resell rights are not included by default — customers must review their contract terms for specific permitted use cases, particularly for building competing data products.

Does PDL integrate with Snowflake or Databricks?

Yes. People Data Labs offers native dataset delivery through the Snowflake Data Marketplace and Databricks Marketplace, allowing data teams to access PDL's person and company datasets directly in their existing analytics infrastructure without custom ETL pipelines. Bulk dataset delivery is also available via AWS S3 and GCP.

Does People Data Labs have a Claude Code Skill or Claude Plugin?

Not officially — People Data Labs has a custom MCP server that can be used with Claude, but no 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.