Explorium vs CompanyEnrich vs Hunter.io

Objective, side-by-side analysis of Explorium, CompanyEnrich, and Hunter.io 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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CompanyEnrich

The all-in-one B2B data API suite — 30M companies, 170M contacts, semantic search, lookalikes, and tech stacks in a single API built for AI agents and modern workflows

  • API
  • Free Trial
30M+
Companies
170M+
People

Selected Customers

Clay • ContactOut • Lempire • Hitpay • Salesforge • Tracx • Cold Labs • Glassboard • Netspore

View Provider

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

View Provider

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

CompanyEnrich

  • AI Agent & Workflow Integration

    Connect CompanyEnrich to AI agents and automated workflows via MCP server endpoints or REST APIs, enabling autonomous company research, lead enrichment, and prospect discovery without manual intervention.

  • Company & Contact Enrichment

    Enrich any company domain or contact email with structured firmographic and profile data including industry, revenue, employee count, funding, NAICS codes, technologies used, and contact details.

  • Semantic Search & Lookalike Prospecting

    Use natural language queries to find companies matching a specific profile, or drop in a company URL to instantly discover lookalike companies that share similar characteristics — powering precise ICP-based prospecting.

Signals powering these use cases

  • 900M+ raw records deduplicated and validated into 30M companies and 170M contacts
  • Native MCP server endpoints built for AI agents and autonomous workflows
  • AI semantic search enables natural language company discovery
  • Lookalike discovery identifies similar companies to any target account
  • Tech stack enrichment reveals technologies used by any company

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

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

CompanyEnrich Snapshot

  • Company coverage 1.9
  • Signals depth 1.7

Hunter.io Snapshot

  • Company coverage 4.7
  • Signals depth 1.5

Detailed Feature Comparison

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

Feature Comparison
Explorium
CompanyEnrich
Hunter.io
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 REST API suite with MCP server endpoints; high rate limits and generous export caps
Full RESTful API; no premium plan required to use API
SLA
Up to 99.999% uptime; rate limit 200 requests/min per key
-
Near 100% uptime
Compliance
GDPR, SOC 2, CCPA, ISO 27001
-
GDPR and CCPA compliant
Custom Entities
-
Real-time Lookups
Global Coverage
150M+ companies and 800M+ contacts across 150+ countries
Global company and contact coverage
Global with strongest coverage in US and Europe
CRM Integration
Available on custom enterprise plans
-
Salesforce, HubSpot, Pipedrive, Zapier
Platform interface
REST JSON API, MCP server (AgentSource MCP), batch support up to 100 entities, webhooks, sync and async modes
API-first with MCP server endpoints for AI agent integration; no standalone prospecting UI confirmed
Web app, Chrome extension, API
Natural language search
Workflow automation
Automation integrations
n8n, Claude, custom webhook integrations
MCP server endpoints for AI agents; REST API compatible with standard automation platforms
Zapier (5,000+ endpoints)
Company coverage
150M+ company profiles
30M+ deduplicated, validated company profiles (from 900M+ raw records)
76M+ websites indexed for email pattern detection
People coverage
800M+ people profiles (767M+ verified contacts)
170M+ contact profiles
Millions of professional email addresses across US and European markets
Geographic coverage
150+ countries
Global
Global, with strongest coverage in US and Europe
Data sources type
50+ data providers; proprietary ML enrichment; real-time web signals
Aggregated, deduplicated, and validated multi-source B2B data
Publicly available web pages, company websites, press releases, social media profiles
Global schema consistency
Unified schema across 4,000+ data points globally; consistent API response structure
Unified REST API schema across all endpoints
Consistent email + confidence score schema across all records
Refresh frequency
Daily for high-velocity signals; weekly for semi-dynamic attributes; monthly/quarterly for stable firmographics
-
Continuous web crawling; database updated regularly
Business enrichments
Company size, revenue, industry, tech stack, funding stage, headcount trends, competitive landscape, website traffic
Industry, NAICS codes, revenue, employee count, funding, headquarters, founding year, technologies used
Domain-level email patterns, company email format detection
Prospect enrichments
Job title, seniority, verified email, phone, LinkedIn URL, job history, people events
Contact profiles at 170M scale; reverse email lookup
Individual email addresses, job titles, confidence scores
Enrichment categories
Firmographics, technographics, intent, funding, events, contact, website signals, lookalikes
Company firmographics, people/contact profiles, tech stack, semantic company search, AI lookalikes, reverse email lookup
Email discovery, email verification
Intent data
Event signals
Company events (20+ types), people events (5+ types), funding rounds, acquisitions, hiring surges
-
-
Technographics
Hiring and growth signals
Matching precision
98% company accuracy; 95% people accuracy
Domain, company name, email as lookup keys
80–90% average email accuracy; confidence score assigned to each result
Confidence scoring
Validation methodology
Advanced ML-based deduplication; 98%+ company accuracy; 95% people accuracy
Deduplication and validation pass on 900M+ raw records to produce 30M clean companies
SMTP checks, domain validation, pattern matching, confidence scoring
Deduplication logic
Advanced ML-based deduplication across 50+ data providers
Automated deduplication pipeline across 900M+ raw records
Deduplication via domain email pattern recognition
API availability
QPS performance
Up to 100 QPS; 200 requests/min per API key
High rate limits and generous export caps per documentation
Near 100% uptime; fast RESTful API response times
CRM integrations
Custom plan — CRM integrations available
-
Salesforce, HubSpot, Pipedrive
Data warehouse support
Custom plan — warehouse ingestion 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
-
-
SLA uptime
Up to 99.999% uptime SLA
-
Near 100% uptime stated
Pricing model
Usage-based API credits with custom enterprise plans
Tiered subscription with custom enterprise option
Credit-based subscription
Credit system
Credit-based; 100 credits on free trial; self-serve and custom plans scale with volume
Credit-based access across API endpoints
Credits consumed per email search or verification; separate credit pools for searches vs. verifications
Tier structure
Free trial, Self-serve, Custom Enterprise
Starter ($49/mo with full API access), additional tiers available; enterprise custom pricing
Free, Starter ($49/mo), Growth ($69/mo annual), Enterprise (custom)
Free trial details
30-day free trial with 100 credits; covers API and MCP access
500 free credits for real API testing — no time limit stated
Permanent free plan: 25 searches and 50 verifications per month
Budget commitment options
Custom enterprise plans with volume negotiation
Monthly or annual billing
Monthly or annual billing; annual provides ~30% savings
Custom plans available
Bulk deals support
Resell rights
-
-
-

Pricing

Compare pricing models, flexibility, and commitment structure.

Pricing Dimension
Explorium
CompanyEnrich
Hunter.io
Pricing Model
Usage-based with custom enterprise plans
Tiered subscription; custom enterprise pricing available
Credit-based subscription
Commitment Structure
One-time or custom; no mandatory annual lock-in on self-serve
Monthly or annual (annual discounted)
Monthly or annual commitment; annual saves ~30%
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
500 free credits upon signup
Free plan with 25 searches/month and 50 verifications/month — no time limit
Enterprise Customization
Yes — custom plans include CRM integrations, warehouse ingestion, resell rights, and dedicated support
Yes — engineers participate in scoping to design custom plans
Custom pricing for 20,000+ monthly searches
Onboarding Model
Self-serve for API and MCP; dedicated onboarding for enterprise custom plans
Self-serve with full API docs; white-glove enterprise onboarding available
Self-serve; extensive documentation and help center available

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 Reviewer

Head of Growth

"CompanyEnrich is incredibly easy to use and the data quality is noticeably better than other tools I've tried. The AI semantic search is the standout feature — I can search for something like 'multi-brand lubricant distributors in the US' and get exactly what I need. The lookalike search is also spot-on."
Verified User for CompanyEnrich
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

Is CompanyEnrich better than Hunter.io?

It depends on your use case. CompanyEnrich The all-in-one B2B data API suite — 30M companies, 170M contacts, semantic search, lookalikes, and tech stacks in a single API built for AI agents and modern workflows Hunter.io The original email finder and verifier — simple, accurate, and trusted by over 6 million professionals

What is the difference between CompanyEnrich and Hunter.io?

See the feature-by-feature comparison above. In short: CompanyEnrich focuses on The all-in-one B2B data API suite — 30M companies, 170M contacts, semantic search, lookalikes, and tech stacks in a single API built for AI agents and modern workflows while Hunter.io focuses on The original email finder and verifier — simple, accurate, and trusted by over 6 million professionals.

How much does CompanyEnrich cost compared to Hunter.io?

CompanyEnrich pricing model: Tiered subscription with custom enterprise plans. Hunter.io pricing model: Credit-based subscription.

Is CompanyEnrich 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 CompanyEnrich?

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 CompanyEnrich The all-in-one B2B data API suite — 30M companies, 170M contacts, semantic search, lookalikes, and tech stacks in a single API built for AI agents and modern workflows

What is the difference between Explorium and CompanyEnrich?

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 CompanyEnrich focuses on The all-in-one B2B data API suite — 30M companies, 170M contacts, semantic search, lookalikes, and tech stacks in a single API built for AI agents and modern workflows.

How much does Explorium cost compared to CompanyEnrich?

Explorium pricing model: Usage-based with custom plans. CompanyEnrich pricing model: Tiered subscription with custom enterprise plans.

Is Explorium or CompanyEnrich 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.

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.

What types of data does CompanyEnrich provide?

CompanyEnrich provides company enrichment (industry, revenue, employee count, NAICS codes, funding, technologies, headquarters), contact/people profiles (170M+), semantic company search, AI-powered lookalike discovery, tech stack identification, and reverse email lookup — all via a single REST API.

Does CompanyEnrich support AI agent integration?

Yes. CompanyEnrich provides native MCP server endpoints built specifically to integrate with AI agents and autonomous workflow tools, enabling LLMs and AI SDRs to query company and people data directly.

How many company and people profiles does CompanyEnrich have?

CompanyEnrich maintains 30M+ deduplicated and validated company profiles and 170M+ people/contact profiles, derived from 900M+ raw records that have been deduplicated and validated for quality.

Is there a free trial available?

Yes. CompanyEnrich offers 500 free credits upon signup, allowing teams to make real API calls and validate data quality before committing to a paid plan.

What is the pricing structure?

Pricing starts at $49/month with full API access on every plan. Annual plans are available at a discounted rate. Custom enterprise plans are available for organizations with specific scale or integration requirements — CompanyEnrich's engineers will join the scoping call to design a tailored solution.

Does CompanyEnrich have a Claude Code Skill or Claude Plugin?

Not officially — CompanyEnrich 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.

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.